Refrigerator design
Thread Content
The company plans to design a liquid rapid freezer for frozen seafood. The initial temperature of the seafood is 18°C, the freezing temperature is -25°C, and the temperature of the freezing fluid is -35°C. Since the cooling efficiency of compressors decreases at low temperatures, one compressor manufacturer suggested using a two-stage freezing process: in the first stage, the freezing fluid is cooled to around -15°C, and in the second stage, its temperature is reduced to -35°C. What is the difference in efficiency between these two temperatures, namely -15°C and -35°C?
Gradually cooling in stages is a good method; the results are indeed different.