Energy-saving techniques for refrigerator systems Energy-saving techniques for refrigeration systems: Energy adjustment enables the cooling capacity of the compressor to change with changes in thermal load, which is one of the important contents of automatic refrigeration energy-saving control. Different refrigeration compressors or refrigeration units have different emphasis on energy-saving operation and energy regulation.
Screw-type refrigeration compressor: when setting the cooling capacity of the compressor, avoid its low energy efficiency ratio operating range; for refrigeration systems with a wide range of operating conditions, automatic adjustment of the internal volume ratio; for the screw with economizer operation Machine, discuss the implementation of automatic adjustment of the operating conditions of the economizer. Piston compressor: The method of reducing the number of cylinders working by a certain compressor as the energy adjustment unit, avoiding the reactive operation of the piston, and also avoiding the operation of reducing the COP value of the compressor; using frequency conversion technology to achieve stepless energy adjustment, in Improve energy saving in operating conditions. Adjustment of multiple parallel operation: try to use the number of compressors as the energy adjustment unit, try to keep each compressor in a high energy efficiency operation state; design a combination of different sizes of compressor heads, and invest in the corresponding energy combination for load changes. . About frequency conversion adjustment: Frequency conversion technology for compressor energy regulation is one of the more popular methods at present. If the frequency conversion is too low, it will cause the disadvantages of reduced oil pressure difference and oil volume. If the frequency conversion is too high, it will increase the oil circulation and consumption, and it will also increase the compressor valve failure. The variable frequency drive should also pay attention to its motor should be selected according to the maximum power. Real-time calculation and control to ensure the best energy-saving operation of the system: The optimal design of the refrigeration system and the best operation of the automatic control are very important for realizing energy saving in the cold storage. The real-time control task of energy-saving operation of cold storage can be completed by data collection, calculation control and monitoring system. The collection objects of the data collection calculation control system are all relevant parameters of the refrigeration device, refrigeration system and working environment. The categories include temperature, pressure, pressure difference, liquid level, current, operating status, and fault conditions. The effect of energy-saving automatic control operation of the refrigerator: the use of electronic expansion valve can save energy by 10%; the on-demand defrost function can save energy by 5%; the storage temperature setting at night can save energy by 4%; the operation control of air cooler fan , Can save energy by 3%; cold storage door anti-condensation wire control, can save energy by 2%; compressor unit and condensing fan control, can save energy by 10%. The comprehensive energy saving effect of the above 6 measures can reach 15 to 34%. 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