Power Generation From Coal

Coal comes from the forest (wood) that buried in the ground, where the older the age, the higher caloric value. Coal is basically carbon (C) isobtained from mines with different qualities, because it is mixed with otheringredients depending on the condition of the mine. The things thatdetermine the quality of coal, among other caloric value. Calorific value ofthis there are 2 kinds, namely the value of (Ho) and lower value (Hu).
The value of the calories of fuel obtained by burning the fuel as much astwo pounds and measure the calories obtained by using the calorimeter at a temperature of 15 ° C so that water vapor is obtained from the burning(combustion) condenses and releases pengembunannya calories. While the lower caloric value fuels are obtained by way of reducing the caloricvalue of condensing it with water it contains. Fuel combustion in thermalpower plant flue gas released at temperatures far above the dew point ofwater, energy balance calculation is based on the calorific value because of the exhaust gas temperature as high as it is in the face of water vapor.
In addition to the amount of calories it has, the quality of coal is alsodetermined by its purity. Coal-rat is always attached other substances,such as water and the elements of H, 0, N. and S. The purity of coal in addition to concerns generally, is also influenced by the coal miner was taken.
Solid fuels such as coal is burned in power plant boiler combustion chamber to obtain heat energy. Combustion itself is actually a chemical reaction with oxygen 02 is in the air, with chemical reactions are as follows:
C + 02 → CO2 + heat energy
But because coal is mixed with elements of H, 0, N, and S, then the coalcombustion process also arises chemical reaction between the elements
those with oxygen in the air like the following:
→ 2H2 + 02 2H20
N2 + 02 → NO2
hereinafter with H2O in the air to react to a variety of nitric acid HNO2.
S + 02 → SO2
SO2 further with H2O and 02's in the air reacts
2502 + 2H2O + 02 → 2H2S02


Materials that are essential for the power generation process batubar are:
a) The flow of entry such as coal, oil or gas, limestone, sand and liquid and compressedgas.
b) The flow out like a flow of electricity, steam in the process, ash and flue gas.
c) The flow of internal materials such as water coolers.


One way to reduce pollution by exhaust gases from burning coal is by using fluedizedbed combustion, in which the coal washing water flows along the combustion chamber.


If in my opinion, we must reduce the energy consumption of coal with renewable energyis environmentally friendly and efficient so it takes a huge cost that is by using solarthermal energy or the sun, from the garbage that littered the city