In a steam generator, the feed water supply rate is 205 kg/h, and the rate of coal-fired is 23 kg/h. The net enthalpy rise of water for conversion to steam is 145 kJ/kg. If the calorific value of coal is 2050 kJ/kg, the steam generator efficiency will approximately be:

In a steam generator, the feed water supply rate is 205 kg/h, and the

1.	In a steam generator, the feed water supply rate is 205 kg/h, and the rate of coal-fired is 23 kg/h. The net enthalpy rise of water for conversion to steam is 145 kJ/kg. If the calorific value of coal is 2050 kJ/kg, the steam generator efficiency will approximately be:
A.	42%
B.	72%
C.	52%
D.	62%
Answer» E.