Can coefficient of performance of a refrigerator be greater than unity?
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. Thus it is but obvious that the value of COP is bound to be greater than unity since efficiency is always less than 1.
Is coefficient of performance greater than 1?
The COP usually exceeds 1, especially in heat pumps, because, instead of just converting work to heat (which, if 100% efficient, would be a COP of 1), it pumps additional heat from a heat source to where the heat is required.
What is the coefficient of performance of this refrigerator?
The coefficient of performance, COP, of a refrigerator is defined as the heat removed from the cold reservoir Qcold, (i.e. inside a refrigerator) divided by the work W done to remove the heat (i.e. the work done by the compressor).
How do you increase the coefficient of performance of an ideal refrigerator?
To improve the coefficient of performance, its requires that the compressor work should decrease and refrigeration effect should increase. It means that decrease in condenser pressure and temperature so the refrigeration effect will increase and compressor input work due to this cop will increase.
What is the formula of coefficient of performance?
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.Mehr 4, 1398 AP
Is coefficient of performance of a refrigerator constant?
No, the coefficient of performance of a refrigerator decreases as its inside temperature decreases.Shahrivar 1, 1395 AP
What is chiller IPLV?
The Integrated Part Load Value (IPLV) is a performance characteristic developed by the Air-Conditioning, Heating and Refrigeration Institute (AHRI). It is most commonly used to describe the performance of a chiller capable of capacity modulation.Esfand 7, 1393 AP
What are the two basic categories of chillers?
When a chiller is used, the secondary refrigerant that circulates in the building is _________. Water2. What are the two basic categories of chillers? High & Low Pressure3.
How do you calculate EER for chiller?
Electric motor driven chillers are rated in kilowatts per ton cooling.
- kW/ton = 12 / EER.
- kW/ton = 12 / (COP x 3.412)
- COP = EER / 3.412.
- COP = 12 / (kW/ton) / 3.412.
- EER = 12 / (kW/ton)
- EER = COP x 3.412.
What is the standard rating of refrigeration machine?
The standard unit of refrigeration is ton refrigeration or simply ton denoted by TR. It is equivalent to the rate of heat transfer needed to produce (or that results in the freezing) of 1 short ton (2000 lbs; 907kg) of pure ice at 32°F/0°C from water at 32°F/0°C in one day, i.e., 24 hours.
What is the cop of domestic refrigerator?
coefficient of performance