SSC JE Mechanical Engineering 2018 Set 3 Paper

Question : 170 of 200

Marks: +1, -0

A Carnot heat pump works between temperature limits of 277°C and 27°C. Its COP is

Solution:

Carnot efficiency

=1-T_2/T_1

=1-300/550

= 0.45
Carnot COP of heat engine

=1/{\Carnot \efficiency}

=1/0.45=2.2

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