The evaporation temperature of refrigeration equipment is subject to the requirements of food cold processing techniques. The evaporation temperature of cold storage is an important factor to consider when maintaining proper conditions for food preservation. Therefore, during the freezing process of foods with special requirements, do not arbitrarily increase the evaporation temperature. However, in most cold storage enterprises in my country, the load on the cold storage rooms is far less than the design heat load. In fact, it is generally only 20% to 30% of the design load.
When the heat transfer of the equipment remains constant, but the heat transfer coefficient changes slightly, the evaporation temperature can be appropriately reduced when the load on the cold storage room decreases. In other words, increase the evaporation temperature of the operating equipment while maintaining the internal heat transfer temperature. According to relevant data, increasing the evaporation temperature by 1°C can save approximately 2% of energy. Therefore, increasing the evaporation temperature by 5°C can result in approximately 10% energy savings.
Furthermore, the increased evaporation temperature reduces the temperature difference between the evaporator and the air inside the cold storage. This change thereby reduces the drying loss of food, improving food quality, and further enhancing the economic efficiency of the equipment. This point deserves attention in the operation and management of cold storage refrigeration equipment.
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