Freezing point temperature of brine, economic temperature, refrigerant evaporation temperature, professional information
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I have a few questions and would like to ask the experts for their advice. Please feel free to share your insights. 1. What should be the appropriate difference between the evaporation temperature of frozen brine and that of the refrigerant? Current suggestions: a) below the evaporation temperature is sufficient; b) 10~13°C below the evaporation temperature. 2. What is the suitable temperature range for frozen brine (within the range of 0~-40°C)? Current recommendation: a) Above -20, ethylene glycol is suitable. For temperatures below -20°C, use a salt solution. 3. Could anyone recommend professional design manuals or books on frozen saline systems? I’ve gathered some information recently, but it’s scattered and not organized.
1. During actual operation, the difference between the temperature of the brine outlet water and the evaporation temperature should be within 5°C; if this difference exceeds 5°C, it indicates that the evaporator is dirty. Under normal operation, this difference is only around 2°C, but it is necessary to choose a value that results in a larger difference; after all, outdoor temperatures vary between summer and winter, and the heat exchanger can also develop scale. An increased difference requires a larger compressor to be selected. That is, the increased margin. . 2. Ethylene glycol is used at temperatures above -15. Compared to saline water, operational and investment costs need to be considered