Simple reversed heat engine problem

  • #1
85
2

Homework Statement


In a reversed heat engine, the work done on the engine is 85 kJ and the heat transfer to the engine from the low temperature region is 260 kJ. Determine:
1. the heat transfer to the high temperature region
2. the coefficient of performance as a refrigerator

Homework Equations


Q(hot) + Q(cold) + W = 0

The Attempt at a Solution


260 + 85 = 345 kJ for question 1 if I am correct.
COP = W / Q(input) = 260 / (345-260) =3.05
 

Answers and Replies

  • #2
stockzahn
Homework Helper
Gold Member
498
136
Your results are correct (even though the symbols of your last equation are wrong - it should read ##COP=\frac{Q_0}{W}##).
 
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Likes Joon
  • #3
85
2
Thanks!
 

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