A boiler
produces 1000 kg/hr steam with rise in enthalpy of steam of 2500 kJ/kg. The calorific
value of coal used is 30000 kJ/kg and its consumption is 100 kg/hr. What would
be the boiler efficiency?
एक बॉयलर 1000 kg/hr भाप पैदा करता है, जिसकी भाप की एन्थैल्पी में 2500 kJ/kg की वृद्धि होती है। उपयोग किए गए कोयले का कैलोरी मान 30000 kJ/kg है और इसकी खपत 100 kg/hr है। बॉयलर की दक्षता क्या होगी?
73.33%
18.33%
8.33%
83.33%
83.33%
The thermal
efficiency of boiler is calculated as:
Where, Q is steam generated kg/hr
H is steam
enthalpy kJ/kg
h is feed water enthalpy kJ/hr
q is fuel quantity used per hour
kg/hr
Putting the above values from the given data we have
Hence, the
correct option is (D).
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