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document.writeln('tp:[\'1 - Cooling Tower\',\'The cooling tower collects the water from the condensor.&nbsp; The water is cooled and then pumped back to the cooling water cycle.&nbsp; The by-product is a visible plume from the top.\',\'10 - Steam Governor\',\'A steam governor valve allows for both manual control of the turbine and automatic set-point following.\',\'11 - High Pressure Turbine\',\'The steam passes through a superheater, where its temperature and pressure increase rapidly before it is piped to the high pressure turbine, the first of a three-stage turbine process. \',\'12 - Deaerator\',\'The deaerator is used to remove the air from the condensed water as it passes from the condensor through the feed pump and feed heater on its way back to the boiler drum.\',\'13 - Feed Heater\',\'The feed heater is powered by steam from the high pressure set.&nbsp; The water flows through a series of six or seven intermediate feed heaters, heated up at each point with steam extracted from an appropriate duct on the turbines and gaining temperature at each stage.\',\'14 - Coal Conveyor\',\'Coal is prepared for use by crushing the rough coal to pieces less than 2 inches (50 mm) in size.&nbsp; The coal is transported from the storage yard to in-plant storage silos by rubberized conveyer belts at rates up to 4,000 tons per hour. \',\'15 - Coal Hopper\',\'The coal hopper serves as a collection drum for coal entering the plant from the conveyor and feeds it into the pulverised fuel mill.\',\'16 - Pulverised Fuel Mill\',\'The coal is ground by large metal spheres in the pulverised fuel mill.&nbsp;A 400 ton silo may feed each coal pulverizer at a rate of up to 60 tons per hour. Coal is fed into the top of the pulverizer and ground to a powder, the consistency of face powder, and blown, with air, into the furnace where&nbsp;it rapidly burns, forming a large fireball at the center.\',\'17 - Boiler Drum\',\'The boiler is a rectangular furnace about 50 ft (15 m) on a side and 130 ft (40 m) tall. Its walls are made of a web of high pressure steel tubes about 2.3 inches (60 mm) in diameter. As the water in the boiler circulates it absorbs heat and changes into steam at 700 °F (370 °C) and 3,200 psi (22.1 MPa). It is separated from the water inside a drum at the top of the furnace. \',\'18 - Ash Hopper\',\'The ash hopper collects the residual ash present in the steam.\',\'19 - Superheater\',\'Water of a high purity flows vertically up the tube-lined walls of the boiler, where it turns into steam, and is passed to the boiler drum, where steam is separated from any remaining water. The steam passes through a manifold in the roof of the drum into the pendant superheater (19) where its temperature and pressure increase rapidly to around 200 bar and 570°C, sufficient to make the tube walls glow a dull red. \',\'2 - Cooling water pump\',\'From the bottom of the condenser, powerful pumps recycle the condensed steam (water) back to the feedwater heaters for reuse. The heat absorbed by the circulating cooling water in the condenser tubes must also be removed to maintain the ability of the water to cool as it circulates.\',\'20 - Forced Draught Fan\',\'The pulverised coal&nbsp;is mixed with preheated air&nbsp;driven by the forced draught fan. The hot air-fuel mixture is forced at high pressure into the boiler where it rapidly ignites.\',\'21 - Reheater\',\'Superheated steam from the boiler is delivered through 14–16 inch (350–400 mm) diameter piping to the high pressure turbine where it falls in pressure to 600 psi (4 MPa) and to 600 °F (315 °C) through the stage. It exits via 24–26 inch (600–650 mm) diameter cold reheat lines and passes back into the boiler where the steam is reheated in special reheat pendant tubes back to 1,000 °F (540 °C). \',\'22 - Air Intake\',\'The air intake is used to introduce air into the superheating system.\',\'23 - Economiser\',\'The economiser is used to pre-warm condensed water before it is returned to the boiler drum.\',\'24 - Air Preheater\',\'As the combustion flue gas exits the boiler it is routed through a rotating flat basket of metal mesh which picks up heat and returns it to incoming fresh air as the basket rotates. This is called the air preheater. \',\'25 - Precipitator\',\'The gas exiting the boiler is laden with fly ash, which are tiny spherical ash particles. The flue gas contains nitrogen along with combustion products carbon dioxide, sulfur dioxide, and nitrogen oxides. The fly ash is removed by fabric bag filters or electrostatic precipitators. Once removed, the fly ash byproduct can sometimes be used in manufacture of concrete.\',\'26 - Induced Draught Fan\',\'Exhaust gas from the boiler is drawn by the induced draft fan through an electrostatic precipitator and is then vented through the chimney stack.\',\'27 - Chimney Stack\',\'Where required by law, the sulfur and nitrogen oxide pollutants are removed by stack gas scrubbers which use a pulverized limestone or other alkaline wet slurry to remove those pollutants from the exit stack gas. The gas travelling up the flue gas stack may by this time only have a temperature of about 50 °C (120 °F). A typical flue gas stack may be 150–180 m (500–600 ft) tall to disperse the remaining flue gas components in the atmosphere. \',\'3 - Transmission Line\',\'The generator creates an intermediate level voltage (typically 20-25 kV). This is stepped up by the unit transformer to a voltage more suitable for transmission (typically 250-500 kV) and is sent out onto the transmission system.\',\'4 - Unit Transformer\',\'The unit transformer&nbsp;steps up the voltage to a more suitable for transmission (typically 250-500 kV) and is sent out onto the transmission system.\',\'5 - Generator\',\'The turbine generator consists of a series of steam turbines interconnected to each other and a generator on a common shaft. There is a high pressure turbine at one end, followed by an intermediate pressure turbine, two low pressure turbines, and the generator. As steam moves through the system and loses pressure and temperature energy it expands in volume, requiring increasing diameter and longer blades at each succeeding stage to extract the remaining energy. \',\'6 - Low Pressure Turbine\',\'The lower the pressure of the exhaust steam leaving the low pressure turbine the more efficient is the train of turbine stages. The exhaust steam from the low pressure turbine enters condenser-tube bundles that have cooling water circulating through them. Typically the cooling water causes the steam to condense at a temperature of about 32–38 °C (90–100 °F) and that creates an absolute pressure in the condenser. \',\'7 - Boiler Feed Pump\',\'The condensed water is passed by a feed pump&nbsp; through a deaerator, and pre-warmed, first in a feed heater powered by steam drawn from the high pressure set, and then in the economiser, before being returned to the boiler drum.\',\'8 - Condensor\',\'After passing through the intermediate and low-pressure pressure turbines the steam is a little above its boiling point and is brought into thermal contact with cold water in the condensor, where it condenses rapidly back into water, creating near vacuum-like conditions inside the condensor chest.&nbsp; The condenser, in effect, creates the low pressure required to drag steam through and increase the efficiency of the turbines. \',\'9 - Intermediate Pressure Turbine\',\'The hot reheated steam is conducted to the intermediate pressure turbine where it falls in both temperature and pressure and exits directly to the long-bladed low pressure turbines and finally exits to the condenser.\'],');
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document.writeln('          <div id="maPageTitleText">Coal-fired Thermal Power Station</div>');
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document.writeln('        <td style="width:25%; text-align:right"><select id="maSlideDropdown" onchange="maClient.showSlide(this[selectedIndex].value)" name="slides"><option value="-1" selected>- Choose a slide -</option>');
document.writeln('            <option value="3067">1 - Cooling Tower</option>');
document.writeln('            <option value="3078">10 - Steam Governor</option>');
document.writeln('            <option value="3079">11 - High Pressure Turbine</option>');
document.writeln('            <option value="3080">12 - Deaerator</option>');
document.writeln('            <option value="3081">13 - Feed Heater</option>');
document.writeln('            <option value="3082">14 - Coal Conveyor</option>');
document.writeln('            <option value="3083">15 - Coal Hopper</option>');
document.writeln('            <option value="3084">16 - Pulverised Fuel Mill</option>');
document.writeln('            <option value="3085">17 - Boiler Drum</option>');
document.writeln('            <option value="3086">18 - Ash Hopper</option>');
document.writeln('            <option value="3087">19 - Superheater</option>');
document.writeln('            <option value="3068">2 - Cooling water pump</option>');
document.writeln('            <option value="3088">20 - Forced Draught Fan</option>');
document.writeln('            <option value="3089">21 - Reheater</option>');
document.writeln('            <option value="3090">22 - Air Intake</option>');
document.writeln('            <option value="3091">23 - Economiser</option>');
document.writeln('            <option value="3092">24 - Air Preheater</option>');
document.writeln('            <option value="3093">25 - Precipitator</option>');
document.writeln('            <option value="3094">26 - Induced Draught Fan</option>');
document.writeln('            <option value="3095">27 - Chimney Stack</option>');
document.writeln('            <option value="3069">3 - Transmission Line</option>');
document.writeln('            <option value="3070">4 - Unit Transformer</option>');
document.writeln('            <option value="3071">5 - Generator</option>');
document.writeln('            <option value="3072">6 - Low Pressure Turbine</option>');
document.writeln('            <option value="3073">7 - Boiler Feed Pump</option>');
document.writeln('            <option value="3074">8 - Condensor</option>');
document.writeln('            <option value="3077">9 - Intermediate Pressure Turbine</option></select></td>');
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