Questions regarding refrigeration
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While generating a certain amount of cooling capacity to lower the temperature of the refrigerant, a refrigerator must also release heat to prevent its own temperature from rising too high. I have only come across one type of refrigerator that uses air cooling for heat dissipation. So, how is the heat discharged by a refrigerator with a specific power calculated? The energy efficiency ratio of refrigerators can be as high as over 3.5; so how much heat do they actually emit? How to calculate it?
Find a book on the principles of refrigeration and read it; you’ll understand then. For example, the one by Wu Yezheng is quite classic. Let’s go into more detail about the question you raised. The energy efficiency ratio is the ratio of cooling capacity to electrical power, that is, the amount of cooling capacity that can be achieved by consuming a unit amount of electricity. The heat released is the sum of the cooling capacity and the electrical work done; this is necessary, as energy must be conserved. I wonder if you understand?
This post was last edited by luodanwsk on 2011-1-7 at 16:38. Roughly speaking, if an air conditioner with a power rating of 750W has a cooling capacity of 2500W, then its heating capacity is 2500 + 750 (slightly more) W. The figures above are based on empirical values; for precise information, you may need to consult a textbook. Based on the 2L figure…