How to Make Cold Storage More Energy Efficient

　　1.The indicator for reducing the unit heat flow rate of the cold storage enclosure structure In cold storage design,the unit heat flow rate q of the exterior wall of a low-temperature cold storage is generally around 11.63W.If q can be reduced to 6.9 W,it is estimated that for a 5000T to 10000T low-temperature cold storage,the power cost can be reduced by about 10%.Of course,the reduction in the unit heat flow index means that the insulation layer of the enclosure structure needs to be thickened,and the one-time investment cost increases.However,compared to the reduction in the regular operating costs of the cold storage,it is reasonable and cost-effective to adopt the reduction in the unit heat flow index of the cold storage enclosure structure,regardless of the economic or technical management perspective.

　　2.According to different refrigerated foods and different storage periods,determine the corresponding storage temperature values.For various types of foods,especially meat,during low-temperature storage,determine the corresponding storage temperature based on the biochemical changes and the degree of inhibition of the growth and reproduction of low-temperature bacteria.If low-temperature storage does not exceed half a year,the commonly used storage temperature is-18-15℃;For storage over half a year,a low temperature of≤-18℃should be used;For foods with high fat content,such as fish with high fat content,in order to prevent oxidation of fat during low-temperature storage,a storage temperature below-18℃and between-24℃and-20℃should be used.

　　It can be seen that after adopting different storage temperatures,for certain foods,especially for short-term storage,it is equivalent to increasing the evaporation temperature of the refrigeration system,thereby increasing the cooling capacity of the refrigeration compressor.To achieve energy conservation.

　　3.Reducing the temperature difference between the evaporation temperature of the refrigerant and the temperature inside the cold storage When the temperature inside the cold storage is constant,the evaporation temperature can increase accordingly as the temperature difference between the evaporation temperature and the temperature inside the warehouse decreases.At this time,if the condensation temperature of the cold storage remains unchanged,it means that the refrigeration capacity of the refrigeration compressor increases.In other words,under the same refrigeration capacity,the consumption of electric energy can be reduced.

　　According to estimates,when the evaporation temperature decreases by 1℃,it will consume 3-4%more power.In addition,reducing the temperature difference is also extremely beneficial for reducing the dry consumption of food stored in the warehouse.Because a small temperature difference can enable the warehouse to obtain a larger relative humidity,which can slow down the exchange of heat load in the air in the warehouse,thereby reducing the dry consumption of stored food.Especially for stored food that has not been packaged,a small temperature difference should be used.

　　4.The freezing room is equipped with a dual speed or variable speed fan.During the freezing process of food,the actual heat release is an uneven heat release process,and the corresponding cooling requirements for the cooling equipment are also uneven.The freezing process of food can be divided into three stages,namely,the first stage is the cooling stage,where the temperature of the food drops from>0℃to about 0~C;The second stage is the formation of ice crystals,where the food temperature drops from about 0 to about-5℃;The third stage is the freezing and cooling stage,where the food temperature drops from-5℃to about-15℃.

　　From the above analysis,it can be seen that among the three stages of food freezing,the second stage requires a large amount of refrigeration,at which time all the equipment in the freezing room must be put into operation.However,in the first and last stages,due to the small heat load per unit time,the wind speed and air volume of the air cooler can be appropriately reduced to achieve the goal of saving electricity.If the cooling fan used in the freezing room is only one type of rotational speed and cannot be adjusted,it will affect the adjustment of circulating air volume and indoor blowing speed during the freezing process.Thereby increasing the consumption of electric energy.

　　5.Comprehensively utilize the building space of the cold storage to give full play to its multifunctional role.There are busy and slack seasons between freezing periods,and the slack season is greater than the peak season.In the off-season,it can also be used as a cold storage room to store packaged food.This not only increases the use efficiency and economic benefits;It alleviates various damages to the enclosure structure and solves the temperature impact on adjacent cold storage rooms;Accelerated food freezing speed,shortened time,and improved food quality;It can also be used in conjunction with the use of air coolers to store special foods in ultra-low temperature environments.

　　If you still don't understand anything,you can call Anhui Xinhe Electromechanical 0551-63749777.Xinhe Xiaoxin will solve your confusion and 20 years of experience in cold storage construction will help you solve your worries!

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