A researcher during an experiment found that mean temperature of heat addition and heat rejection for a steam power plant operating on a Carnot cycle is 127 deg C and 27 deg C respectively. Later, he calculated the thermal efficiency of the steam cycle. Can you predict what was it?
A. 0.20
B. 0.25
C. 0.30
D. 0.35
Answer:A
A researcher during an experiment found that mean temperature of heat addition and heat rejection for a steam power plant operating on a Carnot cycle is 127 deg C and 27 deg C respectively. Later, he calculated the thermal efficiency of the steam cycle. Can you predict what was it?
A. 0.20 B. 0.25 C. 0.30 D. 0.35
Explanation: Thermal efficiency of a Carnot cycle is given by ( Mean temperature of heat addition-Mean temperature of heat rejection)/(Mean temperature of heat addition)