Inside Power Station

Blackfriars Station Solar Bridge

2012-02-12T03:17:00.001+07:00

Work on the world's largest solar bridge formally begins today as the first of more than 4,400 solar panels are installed above the new Blackfriars station platform.The historic London site is undergoing a multi-million pound refit, which includes extending the platform along Blackfriars Bridge, a structure built in 1886.When complete in 2012, the Victorian bridge will play host to some 6,000

Condenser Tube Leak.

2012-02-12T02:55:00.000+07:00

The first indication of a tube leak will come from the change in conductivity or chemical analysis of the condensate out of the hot-well. The sampling connection can be brought into service to draw off samples of condensate from particular sections of the condenser to locate and isolated the section with the offending tube bundle.When sections and tube bundles with the leak have been located, the

Exhaust Hood pressure and temperature.

2012-02-11T21:46:00.003+07:00

It is not necessary to trip the turbine if the vacuum is extremely lower than the limit. However, exhaust hood temperature, differential expansion, vibration and any other limitations should be closely watched.Temperature exhaust from rolling turbine to taking initial load with exhaust hood spray the upper limit is 52C, and 80C is high alarm and 107C turbine should be trip.In this case it would

Emergency Condition

2012-02-10T23:10:00.013+07:00

Power station at emergency condition meaning that the instrument values or parameters which show are not interlock to trip the equipment or unit of power station for safety but the situation is going to danger for operators and equipments. This situation fully under operators decision to take action to save the operator and equipment.Pulverizer Fire When a Pulverizer system fire is suspected,

Sasol selects BrightSource technology for solar plant design

2012-02-09T06:21:00.002+07:00

Oil and gas company Sasol has selected BrightSource Energy's solar technology to assist in designing a solar thermal power plant in South Africa.Under the agreement, BrightSource and its French engineering group partner Alstom will conduct a comprehensive front-end engineering and design (FEED) study for the South Africa market.The FEED study is a critical step in the design and installation of a

Strengthening a Heat Exchanger

2012-02-09T06:14:00.001+07:00

A heat exchanger is an essential thermal machine used for industrial cooling, with several types existing: shell and tube, plate exchangers, spiral heat exchanger, block and fin heat exchangers.These exchangers are crucial equipment for industrial thermoregulation but also required in residential and commercial air-conditioning plants, achieving heat transfer between two fluids with different

Sundry Losses

2012-02-07T20:10:00.003+07:00

Steam and water leak in steam power station called sundry losses whatever they are expected or unexpected, but now in modern power plant those leak still can be useful. The leakage water from continuous blow-down (expected leakage) goes to blow-down tank and before is deliver to waste water plant we need to reduce the temperature by service water or we called quenching water, but now it is not

Magnetic Storm Can Disturb Power Grid

2012-01-29T01:33:00.004+07:00

Geomagnetic Storms Can Threaten Electric Power Grids. Recall the "Northern Lights"? When the Earth's magnetic field captures ionized particles carried by the solar wind, geomagnetically induced currents (GIC) can flow through the power system, entering and exiting the many grounding points on a transmission network. Systems in the upper latitudes of North America are at increased risk because

Solar Power Wing

2012-01-28T02:17:00.006+07:00

The NASA Helios prototype solar-powered wing on its first test flight over the Pacific Ocean on July 14, 2001.Each of the 14 solar panels powered a 2-horsepower electric motor which drives one of the fourteen propellers. This remarkable vehicle has reached an altitude 0f 81,000 ft(24,700 m) and, under ideal weather condition can go even higher.It is also ideal for checking the wing theory since

Turbine Eccentricity

2012-01-26T20:58:00.014+07:00

A rotor which has been sitting idle during overhaul or has been inadvertently stopped during coastdown for an extended period will develop a bow or bend. This condition must be corrected by turning gear operation and, possibly, with auxiliary heating prior to high speed operation to prevent internal clearance rubbing.Eccentricity is the measurement of Rotor Bow at rotor slow roll which may be

Mollier Chart

2012-01-26T03:23:00.006+07:00

To determine the steam wet or dry is esier use mollier chart. For example the turbine design which has 85 barg minimum pressure set point has 330C permissive to add steam caused by 310C saturation point (20C superheat degree).Mollier chart frequently use at old power station. In modern power station we have facilities that call HP-IPR (high pressure - initial pressure regulator) which prevent wet

Derivative Kicker

2012-01-15T17:47:00.005+07:00

Derivative kicker is used for elimination excessive overshoot and undershoot control at begin and after reach the set point. As we know that proportinally control already have overshoot and undershoot and will reduce by integral control but will get long time to reach the set point. Derivative control is solved the long time problem to reach the set point but the result get derivative kicker

P-I Control for Boiler

2012-01-03T02:40:00.008+07:00

Automatic control system usually consist three kind, Proportional, Combine of Proportional & Integral and Combine of Proportional-Integral-Derivative Control. Proportional Control is simple control but the output or the result is not stable or got overshoot and undershoot value compare with its set value. To minimize overshoot and undershoot valve, we could combine the control with

Generator Protection

2011-12-25T23:28:00.009+07:00

Main protection device functions are: - Differential Protection ANSI code 87G - Time Overcurrent an Short-circuit Protection ANSI code 51/50/67 - Stator Earth Fault Protection ANSI code 51N/50N/67N - Restricted Earth Fault Protection ANSI code 64REF - System Earth Fault Protection ANSI code 59N - Rotor Earth Fault Protection ANSI code 64 - Excitation Field Protection ANSI code 40 - Under- and

SmartGrid in Indonesia

2011-12-23T09:50:00.009+07:00

Smart grid is the new generation of electricity systems characterized by the growing use of communications and information technology in power generation, distribution and consumption of electric energy.This is energy source of electricity with this concept integrated and reduce dependence on natural resources which can not be renewed. Potential energy sources that can be used in the development

Load Shedding

2011-12-19T15:25:00.009+07:00

Economic growth is proportionally with electric demand. Java Bali grid in 1985 peak load only 2196MW with every delta frequency 200MW/Hz. Now in the late of 2011, Java Bali grid peak load is more than 19,000MW with the biggest Unit with Boiler Super-critical 800MW in Paiton 3 East Java.How much decreasing the frequency system if the biggest load got trip? The value of inertia constant (H) still

Fluid Coupling

2011-12-17T01:09:00.008+07:00

Fluid coupling is used for equipment protection which potential to get over torque, for example SSCC (subemerged scraper chain conveyor) and gas air heater.To better understand what benefit a fluid coupling provides when connected between an electric motor and gear train, the speed and torque profile of the electric motor must be considered. During start-up, an across-the-line started motor

Relay

2011-12-12T04:51:00.004+07:00

This below is how the relay trigger manually. Now the relay already use by automatically based on temperaruter or pressure trigger to energize the equipment.Bucholz Relay.a Buchholz relay is a safety device mounted on some oil-filled power transformers and reactors, equipped with an external overhead oil reservoir called a conservator. The Buchholz Relay is used as a protective device sensitive

Gypsum Product

2011-12-01T02:30:00.004+07:00

In every coal fire power station always produce gas, CO2, CO, NO2, NO and S02. Specially for SO2 gas can be absorbed to the auxilliary plant system that we call Flue Gas De-sulphurization plant (FGD). In the coal which sulphur contain more than 2% should be used FGD with limestone slurry as absorb media and from chemical reaction produced gypsum slurry. Final product of gypsum need de-watering

Cathodic Protection

2011-11-11T19:23:00.004+07:00

How Does Steel Corrode in Water?For corrosion to occur, three conditions must be present.1. Two dissimilar metals2. An electrolyte (water with any type of salt or salts dissolved in it)3. A metal (conducting) path between the dissimilar metals.I don't know where I got this information but at least it is very useful to understand how cathodic protection work as explanation below.• If the above

Generator Theory

2011-11-05T14:33:00.021+07:00

Faraday LawAny change in the magnetic environment of a coil of wire will cause a voltage (emf) to be "induced" in the coil. No matter how the change is produced, the voltage will be generated. The change could be produced by changing the magnetic field strength, moving a magnet toward or away from the coil, moving the coil into or out of the magnetic field, rotating the coil relative to the

Hydrogen Plant

2011-11-03T20:08:00.008+07:00

Hydrogen plant is producing hydrogen gas for generator rotor cooling because its properties is better than air cooled but right now rarely be operated due to high cost maintenance and full hazard from explosive.As long for hydrogen plant operator remember that in that area do not activated mobile phone, radio, smoking or created other naked flame, the plant is running without danger. Now let's

Cation Conductivity

2011-11-01T06:01:00.008+07:00

The simple theory of cation conductivity use for detected sea water (NaCl) leak at condenser and then condesate will contaminated with sea water where NaCl + H2O will be reacted be HCl + NaOH. NaOH will be absorb at cation (positive ion) resin and so HCl will be shown as cation conductivity.The complicated explanation was as in high pressure steam systems, cation conductivity is a useful tool for

Transformer life time

2011-10-30T18:16:00.005+07:00

This picture show that after the design life time and/or reaching the 60% substances level only a short time of suitable and reliable service is possible.The preservation measure resulting in reduction the a going accelerators. The result is that the curve (green) of the residual life time is kept in high levels. A improvement of 5 - 15 years of the useful life time is typical.Copy from DTC (

Non Stoichiometric Treatment

2011-10-27T06:28:00.007+07:00

Water treatment plant for power station consist three steps: filtration, reverse osmosis and de-mineralization.Non stoichiometric method is particularly treatment on the filtration use ultra filtration with full polymer plus neutralizing amine and pH conditioner so that HCl consumption will reduce at de-mineralization step on cation exchanger and mix-bed process.Finally water treatment product is