What is a good coefficient of performance?

A good COP for heat pump units starts at about 2.0 for an air source heat pump and about 3.1 for geothermal, but heat pump COP can be well above 4.0 too, as seen in the chart below. A geothermal heat pump is also called a ground source heat pump.

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What does the coefficient of performance tell us?

The Coefficient Of Performance (COP) is a performance rating that tells us how effective a heat pump or air conditioner is at transfering heat versus the amount of electrical power it consumes. What is COP formula? COP (Coefficient of Performance)

The Co-efficient of performance (COP) is an expression of the efficiency of a heat pump. When calculating the COP for a heat pump, the heat output from the condenser (Q) is compared to the power supplied to the compressor (W). _{COP =} |Q| W.

How is refrigerator COP calculated?

For a refrigerator the coefficient of performance is COP = Q_low/(-W). Details of the calculation: (a) COP = Q_low/(-W). (-W) = Q_low/COP = 120/5 J = 24 J. Why are COPs more than 1? Hence option (a) is correct. COP is the ratio of heat extracted from the refrigerator to the work done on the refrigerant. Thus it is but obvious that the value of COP is bound to be greater than unity since efficiency is always less than 1.

Can COPs be less than1?

COP less than 1 is almost "unheard of"..but yes it is possible to have COP less than 1. Even though VARS has COP less than 1 ;it is still an energy efficient system because VARS uses low grade thermal energy as the energy input which can be waste heat from gas turbines ,geothermal energy etc. Is higher coefficient of performance better? Coefficient of Performance (COP) is the efficiency ratio of the amount of heating or cooling provided by a heating or cooling unit to the energy consumed by the system. The higher the Coefficient of Performance the more efficient the system.

What is COP refrigerator?

The efficiency of refrigeration systems and heat pumps is denoted by its Coefficient Of Performance (COP). What is refrigerant and examples? Examples of secondary refrigerants include water, air, hydrocarbons, ammonia, and carbon dioxide, which are more environmentally benign than traditional refrigerants such as HCFCs. They are safer and generally suitable for refrigeration systems.

Can fridge COPs be infinity?

The coefficient of cannot be infinity because a refierator cannot work without external work on the system.