What is a typical coefficient of performance?
The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. Most air conditioners have a COP of 2.3 to 3.5. …
Can the COP of a refrigerator be less than 1?
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 coefficient of performance of refrigerator always greater than 1?
The coefficient of performance (COP) of refrigeration is always 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.
What is the limit on the coefficient of performance for refrigerators and heat pumps?
The COP of the refrigerator and air-conditioner can be less than one or greater than one. The above formula also shows that the COP of the heat pump can never be less than one; it is always more than one.
What is COP refrigerator?
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).
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.
How do you calculate coefficient of performance?
Coefficient of Performance Formula You can calculate the coefficient of performance by dividing how much energy a system produces by the amount of energy you input into the system.
Can the coefficient of performance of a refrigerator be less than 1?
Thus, we can say that the COP of the refrigerator and air-conditioner can be less than one or greater than one. The above formula also shows that the COP of the heat pump can never be less than one; it is always more than one.
Why COP of HP is more than COP of refrigerator?
ANSWER: [COP]H.P. = 1 + [COP]ref the desired effect is to maintain temperature of the body A lower than the surrounding temperature. Therefore, A refrigerator is a device, which operates in a cycle and maintains the temperature a particular body lower than the surrounding temperature.
How do you find the coefficient of performance for a refrigerator?
For a refrigerator the coefficient of performance is COP = Qlow/(-W). Details of the calculation: (a) COP = Qlow/(-W). (-W) = Qlow/COP = 120/5 J = 24 J.
What is the maximum coefficient of performance?
Maximum Coefficient of Performance where: is the temperature of the space to which the heat is delivered. is the temperature of the environment that heat is taken from. is the maximum coefficient of performance for a heat pump.
Which has more COP AC or refrigerator?
In a domestic refrigerator, the temperature of the evaporator or refrigerated space is lower than the air conditioner. Since work input in the case of the refrigerator is higher, the COP of the domestic refrigerator will be less than that of a comfort air conditioning plant.