When the calorific value is high, a lesser quantity of coal is required to generate energy, resulting in less global CO2 emissions per unit of coal
We convert the calorific value of different kinds of coals to standard unit of coal
and let the unit heat value of fuel p equal 8.13 (kW x h)/kg standard unit of coal
, the amount of C[O.sub.2] emissions by per unit of fuel complete combustion h equal 2.62 kg C[O.sub.2]/kg standard unit of coal
in uniform, and the maximum allowable C[O.sub.2] emissions E equal 150 ton.
Heat generation rates in unit of coal
mass against time t or vessel temperature, denoted by s = q/dx/dt (J x [mg.sup.-1]), are shown in Figure 18.
According to the papers, after carrying out initial negotiations with the L1 bidder Thiess Minecs, the NTPC tender committee had also said the revised mining fees and the levelised transfer price of coal from the mine was higher than that of Central Coalfields Ltd ( CLL), a unit of Coal
India Ltd ( CIL).
The efficiency, and the consequent reduction in carbon dioxide production per unit of coal
burned, is directly due to the progress made in designing and building more efficient combustion systems, steam production and turbine efficiency.
If we assume a plant efficiency of 33.33 percent and exclude the contribution of the capital costs, then a unit of electricity will cost three times more than a unit of coal