Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion

Because heat engine absorbs temp from higher source and converts to work and sends the remaining energy to cold sink, where as its totally reverse in case of heat pump work is done to supply the heat from a cold source to heat source.

Answer is A as "A heat pump is a machine or device that moves heat from one location (the 'source') at a lower temperature to another location (the 'sink' or 'heat sink') at a higher temperature using mechanical work".

What Anand has said is not right no heat is converted to mechanical work, mechanical work is done to remove heat from lower temperature area and transfer it to higher temperature area.

Heat pump acts like removing heat from earth and delivering that heat to the sun by using mechanical work.

I think answer is C as heat taken by pump and given to sink by doing work on pump.

B is right answer as work is done to remove heat from sink.

Reverse of Air Condition is Heat Pump. i.e. taking heat from high temperature reservoir to low temperature reservoir.

I think answer C is right and I agree with Banty.

In heat pump the heat absorb from low-temperature body and reject it to high-temperature body when work is done.

B is the correct answer as heat is extracted from the lower temperature body and to do this a we have to supply work.

I think the answer is c.

Because B is for refrigeration.

B is correct one. I agree.