In a boiler, feed water supplied per hour is 225 kg while coal-fired per hour is 25 kg. The net enthalpy rise per kg of water is 150 KJ. If the calorific value of the coal is 2050 kJ/kg, then the boiler efficiency will be
1
75%
2
45%
3
66%
4
55%
In a boiler, feed water supplied per hour is 225 kg while coal-fired per hour is 25 kg. The net enthalpy rise per kg of water is 150 KJ. If the calorific value of the coal is 2050 kJ/kg, then the boiler efficiency will be