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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Complete Question
The complete question is shown on the first uploaded image
Answer:
a) The elongation of the composite bar is given as δ = 0.072 in
b) The axial stress induced in each material is = 5485.7 psi
Explanation:
The explanation to the answer above is shown on the second uploaded image
Answer:
Explanation:
= Area of section 1 =
= Velocity of water at section 1 = 100 ft/min
= Specific volume at section 1 =
= Density of fluid =
= Area of section 2 =
Mass flow rate is given by
The mass flow rate through the pipe is
As the mass flowing through the pipe is conserved we know that the mass flow rate at section 2 will be the same as section 1
The speed at section 2 is .