DiSCUSSION 3

1)      Explain the tem of COPref and its effect in rating refrigeration systems against economic considerations  

 

The energy efficiency or Coefficient of Performance (COP) of a refrigerating system can be defined as the ratio between the refrigerating capacity of the plant, which is given by Q (cooling/freezing capacity, kW) as well as the power or electricity consumption, P (kW) of the compressors and pumps. In terms of the COP, it is basically and primarily depending on the working cycle and the levels of temperature at evaporating or condensing temperature and the same goes with the properties of the refrigerant and system design as well as the size factor. In a way or another. The efficiency of a refrigerator is expressed in terms of the coefficient of performance (COP) and it denoted by the COP_ref as equation below:

For the refrigerator, the important thing is the quantity of the heat supply to the system from the surrounding. The power input is important because from its quantity, we can know how much must be paid for and constitutes the main item of the running cost. In a way or another, if the usage of electricity is high, certainly it may result to a higher cost and be very costly. Whereas, at lower electricity power consumption, it will certainly be more economical and lower down the cost factor.