Chemical Engineering Software

Online Calculator: Refrigerant HFC-134A Property

2011-05-04T02:29:00.003+07:00

Online Calculator: Ammonia Property

2011-05-04T02:29:00.000+07:00

Online Calculator: CO2 Property

2011-05-04T02:28:00.000+07:00

Online Calculator: Steam Table

2011-05-04T02:25:00.002+07:00

Heater Design: Heater Stack Draft Analysis

2011-05-04T01:03:00.000+07:00

Heater Stack Draft Analysis
Fired heaters come in numerous configurations and designs. These configurations include systems that are forced draft, induced draft or a combination of both, but many are natural draft. The natural draft designs are what we will concentrate on in this section.

Regardless of the mechanics involved, the stacks purpose is the same, to safely disperse the products of combustion into the atmosphere. For environmental reasons, many stacks are required to discharge at a particular height. But in most cases they are designed only to meet the needs of the furnace or furnaces they are designed for. In the case of the natural draft furnace, the stack serves another purpose, that of assuring that the furnace stays below atmospheric pressure throughout the setting.

For most stack designs, a gas velocity at the exit of about 15 to 25 ft/sec is sufficient to discharge the gasses into the atmosphere at a rate that will assure they disperse properly. Additionally, most natural stack are designed for 125% of the design flue gas flow to assure that if the furnace is operated above the design point that it will still operate safely.

We can use the sketch of a typical horizontal cabin heater to look at the important features affecting the heater draft.

Natural Draft

In this sketch, the area marked "A" is the height available, for the differences in the density of the ambient air and the flue gas, to create the draft required. Normally the draft required is that which will result in a slightly negative pressure at point "B". It should be noted that, for most heaters, the draft at point "C" required by the burners to induce combustion air is not considered in setting the stack height. The burners are normally sized to use only the draft in the firebox.

The resistance to the draft is the pressure loss across the tubes in the convection, the entry to the stack, the transition to the stack, the damper obstruction, the friction loss, and the stack exit.

Net loss across convection:

The calculation of this pressure loss was covered in detail on page 4 of this section. This loss is discounted by the draft gain across the convection section.

Pressure loss across stack entry:

This pressure loss can normally be considered as a sudden entry since the area of the outlet gas plenum in the heater is usually much greater than the area of the inlet to the transition. A sudden entry pressure loss can be approximated by the following equation.

D_p = 0.34 * V_h
Where,

D_p = Pressure drop, inH₂O

V_h = Velocity head at inlet area, inH₂O

Pressure loss across stack transition:

This pressure loss can normally be considered as a gradual contraction since the area of the inlet and the outlet are usually close in area. A gradual contraction pressure loss can be approximated by the following equation.

D_p = C_a * V_h

Where,

D_p = Pressure drop, inH₂O

V_h = Velocity head at outlet area, inH₂O

C_a = Coefficient based on included angle

And the coefficient can be described as,

Included Angle	C_a
30	0.02
45	0.04
60	0.07

Pressure loss across stack damper:

This pressure loss is normally accounted for by rule of thumb. This may be 0.5 or 0.25 velocity head. We will use 0.25.

D_p = 0.25 * V_h

Where,

D_p = Pressure drop, inH₂O

V_h = Average velocity head of stack, inH₂O

Stack friction loss:

For the stack friction loss, we can use the following equation.

D_p = (0.002989 * 0.018 * r_g * V_g²) / D_s * L_s

Where,

D_p = Pressure drop, inH₂O

V_g = Average velocity of stack, ft/sec

r_g = Density of flue gas, lb/ft³

D_s = Stack diameter, ft

L_s = Stack length, ft

Stack draft gain:

The draft gain will be taken based on the height, "A" on above sketch.

G_d = (r_a - r_g)/5.2 * A

Where,

G_d = Draft Gain, inH₂O

r_g = Density of flue gas, lb/ft³

r_a = Density of ambient air, lb/ft³

A = Height of gas path, ft

Pressure loss across stack exit:

This pressure loss, since it normally exits to atmosphere, can be considered as a sudden exit. A sudden exit pressure loss can be approximated by the following equation.
D_p = 1.0 * V_h

Where,

D_p = Pressure drop, inH₂O

V_h = Velocity head at inlet area, inH₂O

Velocity head of gas:

V_h = V_g² * r_g / 2 / 32.2 / 144 * 27.67783

Using these formulas, we can now determine the height that A is needed to be to provide the draft required. It should be noted that many heaters are not this simple, in that they may have multiple stacks, collection ducts, etc.

Stack Data
Stack inside daimeter, ft:	Include stack damper:
Transition height, ft:	Convection plenum height, ft:
Transition included angle, °:	Transition inlet area, ft²:
Process Data
Flue gas flow, lb/hr:	Density of flue gas, lb/ft³:
Density of ambient air, lb/ft³:	Net Convection loss, inH_2O:
Pressure under shield, inH_2O:	Flue gas multiplier:

Stack Length above transition, ft:

Stack velocity, ft/sec:

Design, ft/sec:

Heater Design: Gas Side Pressure Drop Across Tubes, Online Calculation

2011-05-04T00:54:00.002+07:00

Gas Side Pressure Drop Across Tubes

The gas side pressure drop may be calculated by any number of methods available today, but the following procedures should give sufficient results for heater design.

Bare Tube Pressure Loss
Fin Tube Pressure Loss
Stud Tube Pressure Loss

Bare Tube Pressure Loss:

For bare tubes we can use the method presented by Winpress(Hydrocarbon Processing, 1963),

D_p = P_v /2 * N_r

Where,

D_p = Pressure drop, inH₂O

P_v = Velocity head of gas, inH₂O

N_r = Number of tube rows

And the velocity head can be described as,

P_v = 0.0002307 * (G_n /1000)² / r_g

Where,

G_n = Mass velocity of gas, lb/hr-ft²

r_g = Density of gas, lb/ft³

The Mass velocity is described as,

G_n = W_g / A_n
Where,

W_g = Mas gas flow, lb/hr

A_n = Net free area, ft²

And,

A_n = A_d - d_o/12 * L_e * N_t

For staggered tubes without corbels,

A_d = ((N_t +0.5) * P_t/12) * L_e

For staggered tubes with corbels or inline tubes,

A_d = (N_t * P_t/12) * L_e

Where,

A_d = Convection box area, ft²

d_o = Outside tube diameter, in

L_e = Tube length, ft

P_t = Transverse pitch of tubes, in

N_t = Number of tubes per row

We can now use the following script to try some calculations,

Fin Tube Pressure Loss:

For the fin tube pressure drop, we will use the Escoa method.

D_p = ((f+a)*G_n²*N_r)/(r_b*1.083E+10⁹)

And,
For staggered layouts,

f = C₂ * C₄ * C₆ * (d_f/d_o)^0.5
For inline layouts,

f = C₂ * C₄ * C₆ * (d_f/d_o)^1.0

And,

a = ((1+B²)/(4*N_r))*r_b*((1/r_out)-(1/r_in))

Where,

D_p = Pressure drop, inH₂O

r_b = Density of bulk gas, lb/ft³

r_out = Density of outlet gas, lb/ft³

r_in = Density of inlet gas, lb/ft³

G_n = Mass gas flow, lb/hr-ft²

N_r = Number of tube rows

d_o = Outside tube diameter, in

d_f = Outside fin diameter, in

And,

B = A_n / A_d

For staggered tubes without corbels,

A_d = ((N_t +0.5) * P_t/12) * L_e

For staggered tubes with corbels or inlune tubes,

A_d = (N_t * P_t/12) * L_e

Net Free Area, A_n:

A_n = A_d - A_c * L_e * N_t

Where,

A_d = Cross sectional area of box, ft²

A_c = Fin tube cross sectional area/ft, ft²/ft

L_e = Effective tube length, ft

N_t = Number tubes wide

And,

A_c = (d_o + 2 * l_f * t_f * n_f) / 12

t_f = fin thickness, in

n_f = number of fins, fins/in

Reynolds correction factor, C₂:

C₂ = 0.07 + 8 * R_e^-0.45

And,

R_e = G_n * d_o/(12*m_b)

Where,

m_b = Gas dynamic viscosity, lb/ft-hr

Geometry correction, C₄:

For segmented fin tubes arranged in,

a staggered pattern,
C₄ = 0.11*(0.0 5*P_t/d_o)^{(-0.7*(lf/sf)^0.23)}

an inline pattern,
C₄ = 0.08*(0. 15*P_t/d_o)^{(-1.1*(lf/sf)^0.20)}

For solid fin tubes arranged in,

a staggered pattern,
C₄ = 0.11*(0.0 5*P_t/d_o)^{(-0.7*(lf/sf)^0.20)}

an inline pattern,
C₄ = 0.08*(0. 15*P_t/d_o)^{(-1.1*(lf/sf)^0.15)}

Where,

l_f = Fin height, in

s_f = Fin spacing, in

Non-equilateral & row correction, C₆:
For fin tubes arranged in,

a staggered pattern,
C₆ = 1.1+(1.8-2.1*e^{(-0.15*Nr^2)})*e^(-2.0*Pl/Pt) - (0.7*e^{(-0.15*Nr^2)})*e^(-0.6*Pl/Pt)

an inline pattern,
C₆ = 1.6+(0.75-1.5*e^(-0.70*Nr))*e^{(-2.0*(Pl/Pt)^2)}

Where,

N_r = Number of tube rows

P_l = Longitudinal tube pitch, in

P_t = Transverse tube pitch, in

We can now use the following script to try some calculations,

Coil Data
Tube outside dia., in:	Tube length, ft:
Number of tubes wide:	Number of rows:
Trans. pitch of tubes, in:	Long. pitch of tubes, in:
Fin height, in:	Fin thickness, in:
Fins density, fins/in:	Fin type:
Tube layout:	Corbels:
Process Data
Mass flow, lb/hr:	Bulk density of gas, lb/ft³:
Inlet density of gas, lb/ft³:	Outlet density of gas, lb/ft³:
Bulk viscosity of gas, lb/hr-ft:

Pressure Drop, inH₂O:

Stud Tube Pressure Loss:
For the stud tube pressure loss we will use the Muhlenforth method,
The general equation for staggered or inline tubes,

D_p = N_r*0.0514*n_s((C_min-d₀-0.8*l_s)/((n_s*(C_min-d_o-1.2*l_s)²)^0.555))^1.8*G²*((T_g+460)/1460)

Where,

D_p = Pressure drop across tubes, inH₂O

N_r = Number of tube rows

C_min = Min. tube space, diagonal or transverse, in

d_o = Outside tube diameter, in

l_s = Length of stud, in

G = Mass gass velocity, lb/sec-ft²

T_g = Average gas Temperature, °F

Correction for inline tubes,

D_p = D_p*((d_o/C_min)^0.333)²

And,

G = W_g/(A_n*3600)

A_n = L_e*N_t*(P_t-d_o-(l_s*t_s*r_s)/12)/12
Where,

W_g = Mass flow of gas, lb/hr

A_n = Net free area of tubes, ft²

L_e = Length of tubes, ft

N_t = Number of tubes wide

P_t = Transverse tube pitch, in

l_s = Length of stud, in

t_s = Diameter of stud, in

r_s = Rows of studs per foot

We can now use the following script to try some calculations,

Heat Exchanger Tube Pressure Drop Calculation, Online Calculator

2011-05-04T00:16:00.003+07:00

Intube Pressure Drop

The intube pressure drop may be calculated by any number of methods available today, but the following procedures should give sufficient results for heater design. The pressure loss in heater tubes and fittings is normally calculated by first converting the fittings to an equivalent length of pipe. Then the average properties for a segment of piping and fittings can be used to calculate a pressure drop per foot to apply to the overall equivalent length. This pressure drop per foot value can be improved by correcting it for inlet and outlet specific volumes.

Friction Loss:

D_p = 0.00517/d_i*G²*V_lm*F*L_equiv

Where,

D_p = Pressure drop, psi

d_i = Inside diameter of tube, in

G = Mass velocity of fluid, lb/sec-ft²

V_lm = Log mean specific volume correction

F = Fanning friction factor

L_equiv = Equivalent length of pipe run, ft

And,

V_lm = (V₂-V₁)/ln(V₂/V₁)

For single phase flow,

V₁ = Specific volume at start of run, ft³/lb

V₂ = Specific volume at end of run, ft³/lb

For mixed phase flow,

V_i = 10.73*(T_f/(P_v*MW_v)*V_frac+(1-V_frac)/r_l

Where,

V_i = Specific volume at point, ft³/lb

T_f = Fluid temperature, °R

P_v = Press. of fluid at point, psia

MW_v = Molecular weight of vapor

V_frac = Weight fraction of vapor %/100

r_l = Density of liquid, lb/ft³

Fanning Friction Factor:

The Moody friction factor, for a non-laminar flow, may be calculated by using the Colebrook equation relating the friction factor to the Reynolds number and relative roughness. And the Fanning friction factor is 1/4 the Moody factor. For a clean pipe or tube, the relative roughness value for an inside diameter given in inches is normally 0.0018 inch.

With this, we can calculate the factor,

Equivalent Length Of Return Bends:

The equivalent length of a return bend may be obtained from the following curves based on Maxwell table and can be corrected using the Reynolds number correction factor.

L_equiv = Fact_Nre*L_rb

Where,

Fact_Nre = Reynolds number correction

L_rb = Equivalent length of return bend, ft

Return Bend Equivalent Length:

Reynolds Correction:

Where,

G = Mass velocity, lb/sec-ft²

D_i = Inside tube diameter, in

Visc = Viscosity, cp

Now that we have all the details described, we can calculate the pressure drop for some typical heater coils.

Online Heat Transfer Coefficient Calculator

2011-05-03T23:44:00.013+07:00

Heat Transfer Coefficients

The inside film coefficient needed for the thermal calculations may be estimated by several different methods. The API RP530, Appendix C provides the following methods,

For liquid flow with R_e =>10,000,

h_l = 0.023(k/d_i)R_e^0.8*P_r^0.33(m_b/m_w)^0.14

And for vapor flow with R_e =>15,000,

h_v = 0.021(k/d_i)R_e^0.8*P_r^0.4(T_b/T_w)^0.5

Where the Reynolds number is,

R_e = d_i*G/m_b

And the Prandtl number is,

P_r = C_p*m_b/k

Where,

h_l = Heat transfer coefficient, liquid phase, Btu/hr-ft²-°F

k = Thermal conductivity, Btu/hr-ft-°F

d_i = Inside diameter of tube, ft

m_b = Absolute viscosity at bulk temperature, lb/ft-hr

m_w = Absolute viscosity at wall temperature, lb/ft-hr

h_v = Heat transfer coefficient, vapor phase, Btu/hr-ft²-°F

T_b = Bulk temperature of vapor, °R

T_w = Wall Temperature of vapor, °R

G = Mass flow of fluid, lb/hr-ft²

C_p = Heat capacity of fluid at bulk temperature, Btu/lb-°F

For two-phase flow,

h_tp = h_lW_l + h_vW_v

Where,

h_tp = Heat transfer coefficient, two-phase, Btu/hr-ft²-°F

W_l = Weight fraction of liquid

W_v = Weight fraction of vapor

The following script will allow us to try these formulas out using our browser.

It should be stressed at this time, that there are many ways to calculate the inside heat transfer coefficient, and a lot of care should be taken in the procedure selected for use in heater design. Other methods, such as HTRI, Maxwell, Dittus-Boelzer, or others may be more appropriate for a particular heater design.

Heat Loss Calculations and System Design

2011-05-02T06:25:00.002+07:00

Heat Loss Calculations and System Design

Note: Urecon offers a complete computer assisted engineering service providing such information as: heat loss, time to freeze, fluid outlet temperature, minimum flow rates, tracing wattage required, heat gain, etc., all based on the specific requirements of each project. Basic information needed for typical heat trace design includes: project name/location; minimum ambient temperature; above and/or below ground; depth of bury if applicable; core pipe material and diameter; pipe length per circuit; insulation thickness; required maintain temperature; flow direction for sensor positioning; power point location (one or both ends, middle etc.); voltage available.

Contact Urecon for more info and help with custom design/calculations.

It is recommended that a safety factor of 10 to 25% be added to allow for such field conditions as voltage drop, under voltage condition, etc.

Heat Flow Chart Watts/ft/hr/100°F T⁽²⁾

Dia.⁽¹⁾	Urethane Insulation Thickness
Dia.⁽¹⁾	25 mm (1 in)	40 mm (1½ in)	50 mm (2 in)	63 mm (2½ in)	75 mm (3 in)
1	1.8	1.4	1.2	1.1	1.0
2	2.9	2.2	1.8	1.6	1.4
4	4.9	3.6	2.9	2.5	2.2
6	6.9	4.9	3.9	3.3	2.9
8	8.9	6.3	4.9	4.1	3.6
10	n/a	7.6	5.9	4.9	4.2
12	n/a	9.0	6.9	5.8	4.9
14	n/a	10.4	7.9	6.5	5.6
16	n/a	n/a	8.9	7.4	6.2
18	n/a	n/a	9.9	8.3	6.9
20	n/a	n/a	10.8	9.0	7.6
22	n/a	n/a	11.8	9.9	8.3
24	n/a	n/a	12.7	10.8	9.0

Heat flow in watts per lineal foot

The table is based upon the application of the following formula:

Where:

W = Watts/ft/hr (W x 3.414 = Btu/hr)

K = Btu/ft²/hr/1°F/ft = 0.0108 for Urethane

T = temperature differential°F

D = outside diameter of insulation

d = outside diameter of pipe
Diameters for (D/d) taken as 3/1 for 1" pipe +1" insulation and is typical for all other combinations.

For other than 100°F T, divide by 100 and multiply by required T.

Formula

The heat loss for an externally traced pipe may be calculated by the following formula:

Where:

W = Watts per foot of pipe

Tm = maintained temperature°F

Ta = ambient temperature°F

Ln = natural log

Di = outside diameter of insulation (in)

Dp = outside diameter of pipe (in)

Ki = K value of insulation (BTU • in / hr • ft² •°F)

Dj = outside diameter of jacket (in)

Kj = K value of jacket (BTU • in / hr • ft² •°F)

Sf = Safety Factor

QUICK HYDRAULICS - Flowsheet Simulator and Pressure Drops

2011-04-29T12:24:00.001+07:00

QUICK HYDRAULICS - Flowsheet Simulator and Pressure Drops
Windows 95/98/NT/2000/ME/XP

Quick Hydraulics offers a low cost alternative for flowsheet simulation, heat and mass balances and pressure drop applications. Quick Hydraulics has a wide range of application in process design. Calculations utilize an integrated component database that includes detailed properties for more than 800 components. User specified distillation curves and pseudo components are handled with a properties generation routine. Heat and mass balances as well as flash calculations are carried out automatically. The user has a choice of thermodynamic options and calculation modules to cater for most process flowsheet simulations.

Heat Exchangers - Use heat exchangers in your flowsheet simulations. Specify the number of tubes, passes etc and get the program to calculate the pressure drops. Checks on heat exchange area are also carried out.

Comprehensive fluid database and estimation technology - Quick Hydraulics contains detailed properties for over 800 components. Users can add distillation curves, pseudo components and user defined components. Equations of state include Ideal, Soave Redlich Kwong, Peng Robinson, Chao Seader and Grayson Streed. Fluids include: supercritical and other common gases, water, paraffins, olefins, dienes, naphthalenes and aromatics, sulphur containing organics, halogen containing organics, nitrogen containing organics, alcohols and phenolics, ketones and aldehydes, esters, ethers, organic acids, oxygen containing organics, inorganic acids and inorganic halogen components.

Pumps and Piping - Pipe calculations can be done as single or two phase flow, with or without heat loss. Pipe fittings, insulation and elevation changes are taken into account. Fittings can be combined to simulate manifolds based on database or user supplied resistance coefficients. Pump simulation with differential heads, discharge pressure and power is performed. User supplied pump curves can be entered.

Range of simulation modules - Flowsheet simulation is performed by graphically connecting process equipment modules. Hydraulics systems are drawn using flowsheets. The simulation modules include:

Piping, elbows and tees, reducers, valves (gate, globe, butterfly, plug), check valves, pumps, heating/cooling coils, compressors/expanders, vertical and horizontal vessels (gravity settlers), axial and radial flow packed beds, shell and tube heat exchangers, air cooler heat exchangers, fired tubular heaters, restriction orifices, relief valves, control valves, strainers, steam traps, stream modifiers, stream splitters (including flashing) and component splitters.

Piping Systems FluidFlow3 - Design and Simulation Software

2011-04-29T12:08:00.008+07:00

Piping Systems FluidFlow3 - Design and Simulation Software

A truly original software program for the design and optimization of pipe networks, transporting compressible, incompressible, gas-liquid two phase, settling slurries or non-Newtonian fluids.

The efficient and accurate modelling of your networks is essential for the design of energy efficient, safe, reliable flow systems that are easy to operate and maintain.

This product is used successfully in many diverse industries to model new and existing systems, size pipes, select boosters, controllers and other fluid equipment.

Please take a few minutes to discover why we are best in class.

The tools within FluidFlow3 enable you to:

Build your networks rapidly [2 min]
Evaluate the results and consider design alternatives [5 min]
Communicate your design effectively to others [1 min]

Heat transfer capabilities are included as standard within FluidFlow. At each network element you can select from any of 3 heat transfer options (pipes have 4 options):

Ignore Heat Loss/Gain

Fixed Temperature Change

Fixed Transfer Rate

Do Heat Transfer Calculation

For pipes, the software can also calculate heat loss/gain from the pipe. Pipes can be insulated with different types of materials using any thickness. Convection, conduction and radiation losses are calculated. This means you can use FluidFlow to optimize energy use by selecting the economic insulation thickness.

FluidFlow can model shell and tube exchangers, plate exchangers, coils and autoclaves.

The example opposite shows the heat loss from a 1 kilometer length of uninsulated pipe.

There are over 300 QA example calculations made before each release of FluidFlow. This is one of the verification heat transfer calculation examples.

An example circuit showing 2 heat exchangers with full modelling of both the shell and tubeside. Usually modelling of one side is sufficient.

Several Pressure Loss correlations can be used including: Deleware method, using manufacturers loss data, or using a fixed pressure loss.

With the 2-phase module you can also consider condensors and evaporators.

This network, shows how FluidFlow is used by a customer to model a chilled water cooling system in a Data Centre. Modelling of what happens due to pump failures is also considered in this model.

We have many other customers who model chiller circuits and/or district heating circuits using FluidFlow.

One customer has sucessfully modelled the chiller system for Heathrow Airport and another the storage tank heating system at Europoort. Both networks contain over 5000 pipes and node and solve in a few minutes.

HYDRONET™ - Fluid Network Analysis for MS-DOS™

2011-04-29T11:56:00.002+07:00

HYDRONET Version 4.0
Download Small Version

Overview

HYDRONET is a powerful MS-DOS based application that solves for the steady-state pressures and flows throughout fluid conveyance networks conveying any type of incompressible liquid. Systems of up to 3,000 pipes, 1,000 fittings and valves, 300 pumps and 3,000 nodes can be analyzed. Easy data entry, fast solutions and 3-D system graphics make this software essential for all hydraulic design professionals.

Features -

Incredibly fast solutions
Offers the Hazen-Williams equation for water systems and the Darcy-Weisbach equation for any fluid system.
Full 2-D and 3-D system graphics with zoom capabilities.
Ability to analyze systems conveying ANY type of liquid.
Can use digitizers (graphics tablets) for node coordinates input.
Directly imports HYDROFLO II (MS-DOS) data files.
Graphics output to PCX files.
Full menus of fittings and control valves with optional use of the equivalent length method.
Output system design to DXF files (with our NET2DXF software).
Offers both English and SI (metric) units.

Requirements -

MS-DOS 3.X or higher, 1 Mb RAM and 2 Mb disk space. SummaSketch and Calcomp Drawing Boards optional. Includes manual with numerous examples.

PumpBase™ - Advanced Pump Selection Software for Windows™

2011-04-29T11:55:00.000+07:00

PumpBase™ 2.0
Download 15 Day Trial

Overview

PumpBase™ finds the best pumps for your fluid conveyance application. You can refine your selection by specifying up to 40 selection criteria. PumpBase's database contains thousands of curves from dozens of participating pump manufacturers. Detailed reports are created that can be submitted to pump manufacturers and sales representative for further application verification and price quotes.

Features -

Complete pump curve database access and editing.
Communicates with HYDROFLO for system curve development.
Quick affinity law conversions for speed and trim.
Extensive and editable liquid property database.
Automatic viscosity corrections to pump curves.
Efficiency and NPSHR curves are plotted on pump graphics.
Both English and SI (metric) units.
User Project files save all selection information.
Technical Bulletins/Dimensional Schematics available.
Liquid temperature rise calculations.

Operation -
View all pumps by default. As you add restrictions, the database is filtered for those criteria. Optionally specify operating point data TDH (total dynamic head) and operating flow to select pumps whose operating envelopes include the operating point.
Specify NPSHA (Net Positive Suction Head Available) to restrict selection to pumps whose NPSH required is adequate for operation. Specify (or select) liquid property data to obtain pumps that can provide the required flow and TDH. Enter just the pumped liquid properties and view pump curves with viscosity corrections applied. Manual correction factors can be specified and applied to stocks, slurries and other liquids.
Specify additional selection criteria such as specific manufacturer, curve key, series/model, speed, 60/50 Hz, max sphere size, pump orientation (horizontal, vertical, in-line, side-suction, end-suction), application type (fire, well, process, sludge/slurry, dewatering, sewage, wastewater, HVAC), features (portable, submersible, split-case, solids handling, non AC powered, self-priming, high temperature, high corrosive, ANSI, ISO 2858).

Data Output -

PumpBase provides graphic output of pump performance, system and NPSHR curves. Summary pump selection reports list all pumps suitable for a specific application. Detailed specification reports can be sent to a manufacturer or sales rep for confirmation of proper application.
Selected pumps are ranked by efficiency and are displayed with associated data.
Calculated viscosity correction factors and liquid temperature changes are displayed.
NPSHR is calculated for pumps along with Brake horsepower and specific speeds at the actual operating point for a given impeller trim or speed. Maximum power for the actual trim or speed and maximum power for pump is calculated and displayed.
Databases -
All users have the ability to enter and edit pump curves. Registered pump manufacturers have password access to add and edit their pump curves. Users can access and save copies of all pump curves but cannot alter original pump curves.
Liquid property database elements: temperature, specific gravity, viscosity, vapor pressure, specific heat.
Pump database elements: manufacturer name, ISO certified, address, phone, fax, brochure graphic, pump curve key, pump description, series/model, suction size, discharge size, max working temp, max working pressure, max stages, speed, 60/50 Hz, max sphere size, impeller size, performance curve data, max and min flow, efficiency, NPSHR and additional data for selection criteria.
No data input is required to view all the pump curves. If you enter a system's TDH (total dynamic head) and desired flow, all the pumps that meet your requirements are listed in order of efficiency. Once the pumped liquid's properties are specified, standard centrifugal viscosity corrections are automatically applied to all curves. Manual correction factors can be applied to curves also. NPSHA (Net Positive Suction Head Available) and system curve information can optionally be specified. Users can specify up to 40 additional selection criteria to narrow their search. Pump performance curves with iso-efficiency and iso-NPSHR (Net Positive Suction Head Available) lines are displayed along with the design and actual operating points plotted along the system curve.

PumpBase Participating Pump Manufacturers...

American Seal - Information on mechanical seals and mechanical seal repairs.

ANSIMag Inc. - Magnetically driven centrifugal pumps.

Ace Pump Co. - Centrifugal water pumps for OEM applications.

American Turbine Pump, Inc. - Vertical turbine and submersible pumps.

Bombas Itur - Centrifugal pumps.

Carter Pump/Coffin Turbo, Inc. - Plunger positive displacement and marine boiler feed centrifugal pumps.

Chesterton - High strength, low maintenance line of centrifugal pumps for the process industry.

Crown Pump Corp., Submersible and vertical turbine pumps.

Dickow Pumps - World leader in magnetic drive pumps.

Dorr-Oliver Inc. - Stainless-steel centrifugal pumps.

Endura/Liquiflo Co - Liquiflo gear and Endura centrifugal pumps.

Finish Thompson Inc. - Industrial/process horizontal end-suction centrifugal pumps for corrosive fluids.

Flowserve - ANSI, ISO and API standard pumps and specially engineered pumps and nuclear upgrades.

Fybroc Div. Met-Pro Corp. - Horizontal ANSI fiberglass centrifugal pumps.

Graco Pumps - Air operated diaphragm pumps.

Gorman-Rupp Co. - Full line of centrifugal, vertical, submersible, rotary gear and diaphragm pumps.

Griswold Pump Co. - Full line of vertical and submersible turbine, end suction centrifugal and ANSI process pumps.

Gusher Pumps - Centrifugal and gear pumps.

H & H Pump & Dredge Co. - Hydraulic powered dredge pumps.

HOMA Pump Technology - Submersible pumps.

Hannmann Machinery/Alyan Pump - Centrifugal pumps for boiler feed, sump, sewage and process applications.

Hayward Gordon Ltd. - Recessed impeller and screw centrifugal pumps.

Homelite, Subs. Deere & Co. - Portable dewatering pumps.

ITT Marlow Pumps - Self-priming, straight centrifugal and split case pumps for water, commercial pool or waterpark applications.

Industrial Filter & Pump Mfg - Horizontal elastomer-lined centrifugal pumps for general chemical process and plating industries.

Liberty Pumps - Drainage, sump and effluent pumps.

Liquid Waste Technology - Portable Chopper pumps for handling sludge and debris in ag, industrial and municipal waste handling applications.

Little Giant Pump Co. - Small submersible pumps for sewage, sump pumps, condensate and mag-drive chemical pumps.

MP Pump (div of Tecumseh Prod) - Horizontal end-suction centrifugal pumps for process applications.

Mody LLC - Submersible drainage and non-clog pumps for contractor and industrial applications.

Multiquip Inc. - Electric submersible pumps for various applications. Gas and diesel powered centrifugal and trash pumps.

Pumpac - AOD pumps, mag-drive pumps and Ebara stainless steel centrifugal pumps.

SERFILCO, Ltd. - Corrosion resistant, sealless, leakproof, submersible plastic pumps in both vertical and horizontal orientation.

Solarjack - Solar powered (DC) submersible centrifugal pumps.

Sterling Fluid Sys/LaBour Pump - Series LV, AB and AVS horizontal end-suction ANSI chemical process pumps.

SyncroFlo Inc. - Vertical multi-stage and horizontal end-suction pump packages for process, HVAC, municipal and irrigation.

Vertiflo Pump Co. - Industrial vertical immersion sump and slurry pumps and pumps for pits, tanks, sumps or basins.

Waterous Co. - Portable gas powered fire pumps.

Weber Industries, Inc. - HT booster pumps.

Wilfley, A. R. & Sons, Inc. - HD line of horizontal side-suction slurry pumps.

Zoeller Pump Co. - High volume water, sewage/waste and hazardous environment pumps. Heads to 153 feet, capacities to 2700 gpm.

HCALC™ - Pipe Flow Calculator and Unit Converter for Windows™

2011-04-29T11:52:00.002+07:00

HCALC™ Ver. 1.1
Download Free Version

Overview

HCALC solves for...

head loss given diameter, length, friction and flow
diameter given length, friction, flow and head loss
flow given diameter, length, friction and head loss
pipe area given diameter
velocity given diameter and flow
diameter given flow and velocity
flow given diameter and velocity
Reynolds numbers and friction factors

Head loss calculations are available using these equations...

Darcy-Weisbach for any incompressible liquid
Hazen-Williams for water systems
Manning's equations for water systems

Viscosity will be fixed at 60 degree F water's value when using the Hazen-Williams or Manning equation.

HCALC converts values between various common units. First, make sure the initial unit is displayed to the right of the appropriate data field. Enter the value in the edit field. Right-click the unit and select a new unit type from the pop-up menu. The value will be converted to the appropriate new value for the units selected.

Run HCALC as a stand alone application or have it load at startup and always be available on system tray. Calculations can be copied to the Windows™ clipboard for use in reports and other text applications. A very useful tool for engineers.

Databases

Pipe schedules are available for use. Selection of a specific pipe schedule and a nominal diameter allows the actual inside diameter to be used for a more exact flow calculation. When using the Darcy-Weisbach equation, specific roughness will be initially set to an appropriate value when a schedule is selected, but can be altered by selecting from the specific roughness drop-down list or entering a custom value. Likewise, lists of Hazen-Williams coefficients and Manning's n values are available when using those equations.
The Liquid Property database provides viscosity and specific gravity data when using the Darcy-Weisbach equation and a specific liquid type is selected from the viscosity drop-down menu.

HYDROFLO™ 2.1 - Piping System Design Software for Windows™

2011-04-29T11:51:00.000+07:00

New Version!

HYDROFLO Upgraded To Version 2.1
Download 15 Day Trial

Overview

HYDROFLO 2.1 is a powerful software tool that assists piping system designers in the modeling and analysis of single source/single discharge, re-circulating and gravity flow piping systems. These systems are commonly found in industrial process, water supply, wastewater treatment, fire protection, chemical process, mine de-watering, irrigation and HVAC applications among others. The models created with HYDROFLO can consist of up to 10 parallels and hundreds of elements (pipes, valves, fittings, pumps and tanks). Virtually any type of system element can be described from the wide variety of available elements available on HYDROFLO's menus. Element head losses can be described using flow vs. head loss curves, fixed head loss curves and custom friction coefficients.

HYDROFLO models systems conveying any type of incompressible fluid and solves for the full-pipe, steady-state pressures and flows. Hydraulic grade line plots are displayed in the workspace of solved systems so that suction and high-head conditions are easily observed. The Hazen-Williams equation is available for use with water systems and the Darcy-Weisbach equation is available for use with any type of incompressible fluid. Once a system's total dynamic head and flow are found, PumpBase™ can be used to find the best pump for your application.

Systems are built by dragging and dropping both individual or groups of elements onto the workspace. HYDROFLO's new clipboard is available for mass storage, moving and copying of elements. The clipboard can be saved separately from project data, so that a collection of pumps and/or other elements can be brought into any design.Fly-over element inspection (placing the mouse cursor over elements) lets you rapidly identify system components. Elements can be stretched and/or increased in image size for easier viewing. Eleven example problems with their data files are presented in the Help file that depict most of the possible situations that arise in system design.

Once a system is built, PDF reports of flows, pressures, line and pump graphics and other operational results can be previewed and printed. Individual or groups of elements can be edited using the new Group Editor. Elements can be "tagged" to assist with editing.

Many types of hydraulic problems can be solved...

Validation/calibration of existing single source/discharge systems.
Modeling a proposed system’s operation.
Determination of line head losses at a specific flow rate (termed a forced-flow system).
Analysis of cavitation (Net Positive Suction Head) problems.
Comparison of equivalent SI unit to English unit designs.
Modeling of re-circulating and gravity (non-pumped) flow systems.

Element types

Pumps - Pumps can be defined (described by entering points from their performance curves) or undefined (setting a design flow). When pumps are in series, a combined series curve is built and depicted graphically.
Data Input...ID - all elements have this alphanumeric 15 character string (required, unique).
Allowable Flow Direction - set this flow direction (required).
Description - all elements have a description available (optional).
Elevation - elevation of pump (required).
Design Flow - desired flow level.
or Pump Curve - flow increment and 4 points of head.
NPSHR curve - 3 points at the flow increment (optional).
Speed - and 2 other speeds (optional).

Results...
Operating head - total dynamic head (TDH) of pump.
Operating flow - flow at operating head.
NPSHA - net positive suction head available.
Pipes - circular cross-section tubes.
Parameters...Length - length of pipe (required).
Specification - select from drop-down list (optional)
Nominal diameter - if specification used, nominal diameters will be available (optional)
Inside diameter - exact inside diameter used in head loss calculation (required).
Friction coefficient - Hazen-Williams C or specific roughness for Darcy-Weisbach (required).

Results...
Flow - amount with direction (arrow).
Velocity - speed of flow.
Head Loss - loss due to friction.
Fittings and Valves - Various types of typically minor loss devices, control valves, some directional.
Parameters...
Type - dozens of standard types from menus, custom, check valves,
enlargements/reducers, Nozzles/orifices, Fixed Head Loss (FHL) devices,
Flow Control Valves (FCV), Pressure Reducing Valves (PRV),
Pressure Sustaining Valves (PSV), Flow vs. Head (FVH) devices.
Diameter - nominal diameter (required).
Friction coefficient - standard K (or Cv) coefficient.
Allowable flow direction - for directional types above (required).

Results...
Flow - amount with direction (arrow).
Velocity - speed of flow.
Head Loss - loss due to friction.
Supplys - Pressurized (closed tanks) or open tanks (or lakes, ponds or reservoirs) at atmospheric
pressure, hydrants or force mains, discharges to free (open to atmosphere) pressure.

Parameters...
Type - open/closed tank, force main or free discharge.
Pressure - required for closed tank or force main.
Elevation - liquid surface elevation (only data for free discharge type).
Inlet/exit type - (i.e., flush, sharp-edged) - optional for tanks.
Inlet/exit elevation - required for tanks.
Inlet/exit pipe diameter - optional for tanks.

Results...
Inlet/Exit Headloss - if coefficient entered for inlet/exit.
Flow - flow into or out of system.
HGL - Hydraulic grade line elevation (elevation + pressure head).
Gauges - Used to set elevations in system, start and end parallel lines.
Parameters...
Demand (flow into or out of system) - set flows into or out of system at this point.
Elevation - elevation at gauge.
Parallel Number - if a parallel starts/ends at this gauge.

Results...
Pressure - required for closed tank or force main.
HGL - Hydraulic grade line elevation (elevation + pressure head).
Flow - flows into or out of system by parallels at this point.

Reports

Elements By Type - presents the project information and elements by type (pipes, pump, gauges, etc.)
Elements In Sequence - presents the project information and element data in the order they appear -- from the first element in the main line to the last element of the last parallel. It also gives a running HGL (hydraulic grade line) accounting.
Plot Current Line - presents graphics of the line in the current workspace. If solved, hydraulic grade lines are also depicted.
Complete Report - presents all information from the three reports above including all line and pump curve graphics.

Databases

Pipe schedules are available for use. Selection of a specific pipe schedule and a nominal diameter allows the actual inside diameter to be used for a more exact flow calculation. When using the Darcy-Weisbach equation, specific roughness will be initially set to an appropriate value when a schedule is selected, but can be altered by selecting from the specific roughness drop-down list or entering a custom value. Likewise, lists of Hazen-Williams coefficients and Manning's n values are available when using those equations.
Fittings and Valves are available off of two menus. There are dozens of standard types, custom, check valves, enlargements/reducers, Nozzles/orifices, Fixed Head Loss (FHL) devices, Flow Control Valves (FCV), Pressure Reducing Valves (PRV), Pressure Sustaining Valves (PSV).
The Liquid Property database provides viscosity and specific gravity data when using the Darcy-Weisbach equation and a specific liquid type is selected from the viscosity drop-down menu.

CONVAL® - the PC software for engineers, planners and operators of industrial plants.

2011-04-29T11:48:00.000+07:00

CONVAL^® integrates extensive calculation functionalities for components and processes in industrial systems, based on tried-and-tested methods, such as DIN, VDI, VDMA EN/ISO and ISA.

By strictly avoiding all forms of dependence on equipment manufacturers, CONVAL^® guarantees flexible, professional working.

The range of available calculations extends from control valves and throttle elements through piping systems to heat exchangers, including integrated property calculations (based on a property database) and comprehensive databases for control valves, safety valves, materials, etc. as standard.

The current release of CONVAL^® is 8.0

Supportinformations for older CONVAL^® versions can still
be found in the support area for CONVAL^® 7.0, CONVAL^® 6.0 andCONVAL^® 5.0.

CONVAL^® can calculate pressure and temperature-dependent properties according to various methods.

Almost all the program modules require a certain amount of information about the pressure and temperature-dependent properties of the medium being used in the process.

CONVAL^® is capable of calculating this process data automatically for a large number of media (approx. 1000) in connection with the calculation program.

Three different calculation methods for process data are offered at present, namely:

Using approximation equations based on a property database for physical constants.
By interpolation on the basis of a property database for actual measurement series.
With the help of extremely accurate thermodynamic equations of state.

Approximation is a very useful option if no special calculation methods, such as the steam table (IAPWS 97) for water, are available.

CONVAL^® integrates an extensible property database containing around 800 substances and their physical constants, which can be taken as a basis for pressure and temperature-dependent calculations of the substance properties.

The boiling pressure p_v of a liquid can be calculated, for example, in its state at a temperature t₁, or the boiling temperature t_v of this liquid in its state at a pressure p₁, in accordance with Riedel's correlation (error < 10%).

Alternatively, it is possible to calculate the real gas factors Z₁ and Z_n, and thus also the specific gas densities. This calculation is based on Newton and Raphson's correlations and on publications by Dranchuk, Purvis, Robinson and Takacs.

The operating density of liquids is calculated with the help of the physical constants stored in the database according to mathematical approximation methods described by R. W. Hankinson and G. H. Thomson. In conjunction with other authors these methods are also referred to as the COSTALD correlation. The error is < 1% for the majority of applications and only exceeds 5% under a very limited number of boundary conditions.

Approximation methods are also available for calculating the isentropic exponent, the sound velocity, etc.

Economics

2007-01-19T13:13:00.000+07:00

Economics
Cogeneration economics
Calculates the the return on investment, present worth, and payback for a power plant that
produces electrical power or produces both electrical power and heat energy.
Flash tank economics
This program calculates the economic results that can be achieved by using a flash tank and a
heat exchanger to recover boiler blowdown. The program calculates the amount of flash steam and saturated
condensate that will separate when a high pressure, high temperature water steam is flashed in a tank of
lower pressure. It then assigns a dollar value to each of the two components based on the value of fuel,
boiler efficiency, etc.
Insulation economics
This program calculates the heat loss and surface temperature of an insulated pipe of
specified diameter and internal temperature. It then calculates the present worth cost, $/foot, to own
and operate each insulated system. This allows the user to select the optimum insulation thickness for
each pipe based either on the cost of the insulation and heat loss or on the maximum acceptable surface
temperature. Four types of insulation are supported. Pipe sizes through 36" are included. Three layers of
insulation are supported ranging in thickness from 0 to 10".

Heat Transfer

2007-01-19T13:12:00.001+07:00

Heat Transfer

PHEdesign (Plate Heat Exchangers)
PHEdesign 1.0 program for simulations of the plate heat exchanger. By setting our controlled variables
and material properties, the optimum plate dimensions and materials can be selected by the computer program. These
are included rate of heat transfer, the size of plate heat exchanger, and chevron angle (beta) between 25 to 65
degrees under single pass condition. Also this program is capable of calculating the pressure drop in plate, from
which the energy and material can be saved by decreasing the pressure drop (decreasing horsepower per unit area)
and increasing chevron angle

Space heating load

This program calculates the maximum heating load required in a space (single zone) so
that a furnace can be sized. Heat transfer coefficients are built in for many types of wall, floors,
doors, windows, etc. Custom values can also be used. The heat needed for infiltration & humidity
control are also calculated. Final furnace sizes are tabulated with several values of efficiency.

Surface Condenser
This program, for analysis of turbine steam condensers, can either calculate the performance
of a known condenser, or can calculate the design requirements of a new condenser for a known steam load.
The steam and condensate properties are built in. Also a complete range of tube properties are built in.
The cleanliness of a given condenser can be etermined quickly using a trial and error method.

Cooling Tower
Cooling Tower Analysis is a powerful, user friendly, program for the analysis of induced,
mechanical-draft, counterflow cooling towers. The program can be used for the analysis of existing
towers or for the preparation of specifications for new towers.

Steam Heater

This program calculates the performance of a steam, shell-and-tube heat exchanger of known
construction using rigorous formulations. Steam and water properties are built in. The type of fouling can
be specified. The shell-side fluid is always steam. The tube side fluid can be any non-condensing fluid.

Heat Recovery Steam Generator
This program calculates the amount of steam that can be generated by a fired or unfired waste heat
boiler (Heat Recovery Steam Generator). The steam and condensate properties are built in. The program first
calculates a design mode and then an "off-performance mode" for changed conditions.

Insulation Economics
This program calculates the heat loss and surface temperature of an insulated pipe of specified
diameter and internal temperature. It then calculates the present worth cost, $/foot, to own and operate
each insulated system. This allows the user to select the optimum insulation thickness for each pipe based
either on the cost of the insulation and heat loss or on the maximum acceptable surface temperature. Four
types of insulation are supported. Pipe sizes through 36" are included. Three layers of insulation are
supported ranging in thickness from 0 to 10".

Shell & Tube Heat Exchanger

Heat Exchanger Performance is a powerful, user friendly, program for the analysis of two types of
Heat Exchangers: Shell & Multi-Tube Exchangers, and Double Pipe Exchangers. In either case, the tubes are of the
bare-tube type. The program will analyze the performance of a known heat exchanger: Given the flows and inlet
temperatures of the Tube-side fluid and the Shell-side fluid, the program will predict the exit temperatures
of both fluids and the total heat exchanged.

Physical Properties and Steam Tables

2007-01-19T13:12:00.000+07:00

Physical Properties and Steam Tables

TriMax^TM
Tri MAX^TM is a powerful software resource for the practicing engineer, chemist, or student. It is
your best source of data. Through the use of menus: data and functionality are put at the finger tips of the
power user. Tri MAX^TM provides data such as periodic table, steam tables, heat capacities, critical values,
viscosities, diffusion coefficients, thermal conductivities. Math functions are also provided, such as linear
regression, quadratic equation, curve fitting, and a calculator that goes far beyond the standard calculators
available for Microsoft^TM Platforms.

zCalc
zCalc is a compressibility calculator for natural gas mixtures using the American
Gas Association methodology from their AGA-8 Report. The software quickly takes a mixture of natural
gas (up to 20 components) and calculates the compressibility, molar density, mass density, base
compressibility and supercompressibility.

Steampak
Steampak is a high-accuracy steam and water physical properties database and
process calculator. Steampak's algorithm is based on the equation of state of Keenan, Keyes,
Hill and Moore which is the basis of the published International Steam Tables. The process
calculator allows calculation of steam compression and expansion processes at user-selected
efficiencies including isentropic & adiabatic expansions and flash calculations.

Chempak
Chempak is a powerful physical properties software package giving details of thermodynamic and transport properties of over 600 common organic and inorganic compounds as
functions of temperature and pressure. All common chemical engineering constant and variable
properties are included. Liquid and vapor phases are covered as well as saturated and
unsaturated states. Mixtures of database compounds and new liquids can be defined.
Numerical and graphical output are supported. Chempak links to Chempak II - Madison's
user-defined compounds software package.

Chempak II
Chempak II enables the user to define the thermodynamic and transport properties
of new compounds not already in the Chempak database. From as little information as the
compound chemical formula, the user can build up a complete profile of the compound
properties and add the compound to the Chempak database for future recall and calculation.
Chempak II allows the user to enter known property data and also provides sophisticated
estimation methods where no data is available. Chempak II provides the perfect companion
software to Chempak.

Steam Properties
This program calculates the properties of superheated, saturated, or wet steam.
In addition it calculates the properties of saturated water.

Steam Tables
(Metric and US units) This program provides the thermodynamic properties of
water using IFC formulation for industrial use. Knowing any two properties, the user is able
to completely define the properties of water/steam. Unlike most steam table programs, this
program also provides the user with the point's location on the T-S diagram. Multiple points
can be connected by a line, defining the user's process system. It even gives you the steam
quality.

Physical Properties
Quickly, easily and reliably calculates thermodynamic and transport properties
of gaseous, liquid and solid species.

Steam Approximations
quickly, easily and reliably calculates thermodynamic and transport properties of steam for both saturated
and superheated areas.

Physical Properties and Steam Approximations
Quickly, easily and reliably calculates thermodynamic and transport properties of gaseous, liquid and
solid species and steam approximations for both saturated and superheated areas.

Physical Properties Spreadsheet
Physical Properties Spreadsheet quickly, easily and reliably calculates thermodynamic and
transport properties of a few gaseous, liquid and solid species.

This spreadsheet should prove to be a good tool for those who are involved at various levels with design,
operation and management of power and propulsion systems. It should provide you with the opportunity to more
quickly, easily and effectively do your work, explore more options, save time and give more confidence in
carrying out your calculations.

Steam Approximations Spreadsheet

Steam Approximations Spreadsheet quickly, easily and reliably calculates thermodynamic
and transport properties of steam for saturated and superheated areas.

This software package should prove to be a good tool for those who are involved at various levels
with design, operation and management of power systems. It should provide you with the opportunity to
more quickly, easily and effectively do your work, explore more options, save time and give more confidence
in carrying out your calculations.

Physical Properties and Steam Approximations Spreadsheet

Physical Properties and Steam Approximations Spreadsheet quickly, easily and reliably calculates
thermodynamic and transport properties of a few gaseous, liquid and solid species and steam approximations for both
saturated and superheated areas.

This software package should prove to be a good tool for those who are involved at various levels with design,
operation and management of energy conversion systems. It should provide you with the opportunity to more quickly,
easily and effectively do your work, explore more options, save time and give more confidence in carrying out your
calculations.

2007-01-19T13:11:00.001+07:00

Psychrometrics
Psychrometrics (Archon)
This program provides Psychrometric properties of air given two properties as input values
at a known altitude (or atmospheric pressure). The properties are determined using the ideal gas law for
the behavior of air. Once the properties are determined, the point is indicated on the Psychrometric chart.
Process lines can be connected between any two know points, this will provide the user with the differences
in moving from one point to the next. Additionally, this program will allow the user to perform some basic
HVAC calculations that depend on psychrometrics.

Psychrometrics (CU Services)
This program calculates the properties of a mixture of air and water vapor such as used in HVAC
applications. In addition, the porgram calculates the results of the four most common types of heating and
cooling psychrometrics processes.

Psychrometrics

2007-01-19T13:11:00.000+07:00

Processing, Storage Tanks, Pressure Vessels, Mixing Systems

2007-01-19T13:10:00.001+07:00

Processing, Storage Tanks, Pressure Vessels, Mixing Systems

Cerebro Mix

CerebroMix is a unique PC-based program which encompasses all the functionality
of the other Cerebro products, CerebroTank, CerebroPV and CerebroMixLight. It is an indispensable
tool for anyone involved in the evaluation and design of mixers in vertical tanks, either pressurized
or atmospheric. Using input data such as primary dimensions, fluid properties and certain desired
mixing objectives, the program will output full operating conditions, critical impeller speeds,
liquid level gradation, solid suspension and all system dimensions.

Cerebro PV
CerebroPV is an easy-to-use PC program to assist in the evaluation and design of
vertical and horizontal storage tanks, running either pressurized or at atmospheric conditions.
Using input data such as principal dimensions, fluid density, material, desired tank shape
(including heads) and support type, the software calculates structural characteristics for
both the tank and the support structure using ASME Section VIII Division 1 standards. This
software allows both users and manufacturers of pressure vessels to check their equipment for
various operating conditions, in order to provide a risk assessment. The program produces
output in the form of a Microsoft Word Document, with all data listed in tabular form,
together with a scale drawing of the tank and its support structure.

Cerebro Tank
CerebroTank is an easy-to-use PC program to assist in the evaluation and design of
vertical and horizontal storage tanks. Using input data such as geometric dimensions, fluid density,
support type, tank material and shape (including heads), the software calculates structural characteristics
for the tank and the supports (legs and saddles). Using the wall thicknesses provided by the software, the
user can select from a database of standard plate thicknesses; these thicknesses will be factored depending
on the degree of corrosiveness of the liquid. The program also gives flange thicknesses for the tank head,
allowing for weld efficiency.

Combustion

2007-01-19T13:10:00.000+07:00

Combustion

Enviropak

Enviropak is a combustion calculator and incinerator design package for
organics. The user can choose from the resident database of compounds or define new
compounds. Recovery heat exchange, combustor sizing and destruction efficiency are
all features of this powerful software package. Included is a useful combustion properties
estimation module. Output includes analysis of combustion gases with computed temperature
and residence times.

Combustion Analysis
This program calculates boiler efficiency using the heat loss method of the ASME
Boiler Code PTC-4.1. The program accepts the ultimate analysis of any fuel, % by weight
for liquids and % by volume for gases.
It performs a stochiometric analysis of the combustion and calculates the individual losses,
the quantities and types of gases produced, and the air flow required for the given %
excess air.

Fluid Flow

2007-01-19T12:56:00.000+07:00

Fluid flow

Piping Pressure Loss
This program calculates the pressure loss of fluids flowing under pressure in circular pipes.
The program can calculate flow in either compressible mode (for gases) or incompressible flow. It allows a
choice of units: gpm, pph, scfm, or acfm. Any single-phase liquid or gas can be accepted. The properties of
water, steam and air are built in.

Pipe Network (Hardy Cross)
Hardy-Cross algorithm to determine the flow and pressure loss in each leg of a series-parallel pipe network.

HSC Chemistry Chemical Reaction and Equilibrium Software

2006-06-22T12:12:00.000+07:00

HSC Chemistry is the world's favorite thermochemical software. HSC is designed for various kinds of chemical reactions and equilibria calculations.

HSC Chemistry offers a quick and easy way to solve chemical reaction problems on your personal computer. HSC has a wide range of application possibilities in industry, research and education. All calculations utilize automatically integrated thermochemical database that includes more than 17000 compounds. See the full species list pdf version (2703Kb) or zipped pdf version (622Kb)

Whats new in version 5.0. If you have an older version, check out the changes.

The current version contains fourteen calculation modules displayed as fourteen options in the HSC main menu:

Coil Data
Tube inside dia., in:	Pipe straight length, ft:
Bend radius, in:	Number of returns:
Process Data
Mass vel., lb/sec-ft²:	Viscosity, cp:
Spec. vol. at start, ft³/lb:	Spec. vol. at end, ft³/lb:

Tube diameter, in:		Mass flow, lb/hr-ft²:
Percent vapor, %:		Bulk Temp., °F:
Liquid Properties		Vapor Properties
Thermal cond., Btu/hr-ft-°F:		Thermal cond., Btu/hr-ft-°F:
Visc. bulk, lb/ft-hr:		Visc. bulk, lb/ft-hr:
Spec. Heat, Btu/lb-°F:		Spec. Heat, Btu/lb-°F:
Visc. @ wall, lb/ft-hr:		Temp. @ wall, °F:

Chemical Engineering Software

Online Calculator: Refrigerant HFC-134A Property

Online Calculator: Ammonia Property

Online Calculator: CO2 Property

Online Calculator: Steam Table

Heater Design: Heater Stack Draft Analysis

Heater Design: Gas Side Pressure Drop Across Tubes, Online Calculation

Heat Exchanger Tube Pressure Drop Calculation, Online Calculator

Online Heat Transfer Coefficient Calculator

Heat Loss Calculations and System Design

QUICK HYDRAULICS - Flowsheet Simulator and Pressure Drops

Piping Systems FluidFlow3 - Design and Simulation Software

Piping Systems FluidFlow3 - Design and Simulation Software

HYDRONET™ - Fluid Network Analysis for MS-DOS™

HYDRONET Version 4.0 Download Small Version

Overview

Features -

Requirements -

PumpBase™ - Advanced Pump Selection Software for Windows™

PumpBase™ 2.0 Download 15 Day Trial

Overview

HCALC™ - Pipe Flow Calculator and Unit Converter for Windows™

HCALC™ Ver. 1.1 Download Free Version

Overview

Databases

HYDROFLO™ 2.1 - Piping System Design Software for Windows™

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HYDROFLO Upgraded To Version 2.1 Download 15 Day Trial

Overview

Many types of hydraulic problems can be solved...

Element types

Reports

Databases

CONVAL® - the PC software for engineers, planners and operators of industrial plants.

CONVAL® integrates extensive calculation functionalities for components and processes in industrial systems, based on tried-and-tested methods, such as DIN, VDI, VDMA EN/ISO and ISA.

The current release of CONVAL® is 8.0

Economics

Heat Transfer

Physical Properties and Steam Tables

Psychrometrics

Processing, Storage Tanks, Pressure Vessels, Mixing Systems

Combustion

Fluid Flow

HSC Chemistry Chemical Reaction and Equilibrium Software

HYDRONET Version 4.0
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PumpBase™ 2.0
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HCALC™ Ver. 1.1
Download Free Version

HYDROFLO Upgraded To Version 2.1
Download 15 Day Trial

CONVAL^® integrates extensive calculation functionalities for components and processes in industrial systems, based on tried-and-tested methods, such as DIN, VDI, VDMA EN/ISO and ISA.

The current release of CONVAL^® is 8.0