A heat pump has a coefficient of performance that is 60 of the Carnot heat pump coefficient of performance. The heat pump is used to heat a home to 24.0C during the winter with the low temperature reservoir at the outdoor temperature.
At which outdoor temperature would it be more efficient to add the energy directly to the interior of the home than use it to run the heat pump? A)
-25.2C
B)
-154C
C)
-40.0C
D)
-83.4C
E)
-4.00C
Question 2
Which of the following cannot occur?
A)
+ + + v
B)
2
C)
+ + p K+ + +
D)
- + p n +
E)
- - + p
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