A heat pump and a refrigerator are operating between the same two thermal reservoirs. Which one has a higher COP?
1 answer:
Answer:
Heat pump
Explanation:
COP:
As we know that COP can be defines as the ratio of desired effect to the work in put.
The desired effect can be different for heat pump our desired effect to heat the space and for refrigeration our desired effect is cooled the space.
So
When heat pump and refrigerator are operating with same temperature limits then from expression we can say that
COP of heat pump = 1 + COP of refrigeration.
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Answer: hello some parts of your question is missing attached below is the missing information
The radiator of a car is a type of heat exchanger. Hot fluid coming from the car engine, called the coolant, flows through aluminum radiator tubes of thickness d that release heat to the outside air by conduction. The average temperature gradient between the coolant and the outside air is about 130 K/mm . The term ΔT/d is called the temperature gradient which is the temperature difference ΔT between coolant inside and the air outside per unit thickness of tube
answer : Total surface area = 3/2 * area of old radiator
Explanation:
we will use this relation
K =
change in T = ΔT
therefore New Area ( A ) = 3/2 * area of old radiator
Given that the thermal conductivity is the same in the new and old radiators