First, rational use of the Treasury, off-season and timely storage

The power consumption of refrigerators is calculated according to the amount of cooling capacity consumed in the refrigerator, which usually includes two parts: one is the cooling consumption when the goods are cooled and refrigerated; the other is the refrigerating room itself (that is, the envelope) and operation management The consumption of cold. The key to saving electricity is the utilization of refrigerators, cold storage with low utilization of cold and more power consumption. In actual operation, the power of the motor is selected according to the cooling capacity of the mechanism, that is, the cooling capacity of the storage is less than the cooling capacity of the refrigerator. Cold storage in the off-season operation, due to the cold storage of goods less, the operation is "big horse-drawn car," a waste of electricity. Therefore, in the off-season when several refrigerated goods can be stored in time and by storage, in order to reduce energy consumption.

Second, regular oil, dirt and air

When the evaporator coil with 0.1mm thick film, in order to maintain the set temperature requirements, the evaporation temperature will drop 2.5 ℃, power consumption increased by 10% or more; when the condenser water wall scaling up to 1.5mm , The condensing temperature will be 2.8 ℃ higher than the original temperature and the power consumption will increase by 9.7%. When the refrigeration system is mixed with non-condensable gas, its partial pressure will reach 0.196MPa, the power consumption will increase about 18%. This shows the regular cold storage refrigeration system, the importance of descaling and air release.

Third, reasonable regulation of cold storage evaporator, timely defrosting

In general, cold storage evaporation temperature increased by 1 ℃, can save 2% to 2.5%. Therefore, to be able to meet the premise of product cooling technology, you can adjust the amount of liquid supply, as far as possible to raise the evaporation temperature. The thermal resistance of the frost layer is generally much greater than the thermal resistance of the steel pipe. When the frost layer thickness is greater than 10 mm, the heat transfer efficiency drops by more than 30%. When the pipe wall temperature difference between inside and outside of 10 ℃, the library temperature at -18 ℃, the tube evaporator refrigeration system running for one month, the heat transfer coefficient K value of only about 70% of the original. When the chiller frosting is particularly serious, not only the thermal resistance increases, but also the flow resistance of the air increases. In severe cases, the air can not be blown. Therefore, the surface of the evaporator needs to be defrosted timely. In large and medium-sized cold storage refrigeration system, the general use of hot ammonia (Fluoride) red cream and water red cream instead of using high energy consumption of electric defrosting, and small freon refrigeration system to simplify the pipeline, the use of electric defrosting , But should be based on the amount of heat required to melt the frost layer to configure the appropriate electric power.

Fourth, pay attention to the energy saving lighting system

Cold storage lighting should be safe, scientific and reasonable basis, from the energy saving and environmental protection point of view, according to the cold room area, height and warehouse temperature and other comprehensive consideration. The lighting inside the refrigerator is generally concentrated in the work area. Should be in the case of operator safety to ensure timely turn off the lights, in order to reduce the thermal load and power consumption of the Treasury. At the same time to try to use high-efficiency low-voltage lighting to reduce the frequency of lamp replacement. LED lighting system has the advantages of environmental protection and power saving, uniform illumination, good luminous efficiency at low temperature and high power supply efficiency. It is a promising new light source and also the future development direction of the lighting system in cold storage.