Cold storage design selection series-refrigeration compressor

Cold storage design selection series-refrigeration compressor Refrigeration compressor is one of the main equipments in the cold storage. The correct selection is very important. The refrigeration capacity of the refrigeration compressor and the power of the matching motor are closely related to the evaporation temperature and condensation temperature. Condensation temperature and evaporating temperature are the main parameters of refrigeration compressors, called refrigeration conditions. After calculating the cooling load of the cold storage, you can select a compressor unit with a suitable cooling capacity. The most commonly used refrigeration compressors for cold storage refrigeration systems are piston type and screw type. Now scroll compressors have gradually become the most commonly used compressors in small cold storage systems. General principles for selection of refrigeration compressors in cold storage 1. The refrigerating capacity of the compressor should be able to meet the maximum load requirement of the cold season, and generally no equipment is used. 2. The determination of single unit capacity and number of units should be considered according to factors such as easy energy adjustment and changes in working conditions of the cooling object. Large-scale compressors should be selected for cold storages with large cooling loads to prevent excessive number of machines. For two units, one can be selected for life service cold storage. 3.Select the appropriate compressor based on the calculated compression ratio. For the Freon compressor, use a single-stage compressor with a compression ratio less than 10, and use a two-stage compressor with a compression ratio greater than 10. 4. When selecting multiple compressors, it is necessary to comprehensively consider the possibility of mutual spares and parts interchange between the units. The compressor model between one unit should adopt the agreed series or the same model. 5. The working conditions of the refrigeration compressor should meet the basic conditions of the design as much as possible, and the working conditions should not exceed the specified operating range of the compressor manufacturer. Today, the refrigeration control technology continues to mature, and the compressor unit controlled by a microcomputer is an ideal choice. 6. Due to the structural characteristics of the screw compressor, its volume ratio changes with the change of operating conditions, so the screw compressor can adapt to different open spaces, the single-stage screw compressor has a large compression ratio and a wide operation Under working conditions, with an economizer, higher operating efficiency can be obtained. 7. Due to its high operating efficiency, low noise, and stable operation, scroll compressors have received people's attention in recent years, and more and more are used in small and medium-sized cold storage projects.

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