Performance simulation calculation method for screw compressor

Abstract

The invention relates to a performance simulation calculation method for a screw compressor. The method comprises the following steps: establishing a compressor mathematical model, performing mathematical regression on a superheat degree correction coefficient according to measured data, and determining the superheat degree correction coefficient; performing mathematical regression on the gas supply working condition correction coefficient according to the actually measured data, and determining a gas supply correction coefficient; performing mathematical regression on the partial load correction coefficient according to the actually measured data, and determining the partial load correction coefficient; inputting an electric system and a working condition, and calculating the performance of the full-load compressor according to the determined mathematical model of the compressor and the input electric system and working condition; if energy adjustment exists, calculating partial load performance based on full load; judging whether air supply exists or not, and if not, calculating the compressor performance under the condition of no air supply; and if the air supply exists, calculating the performance of the compressor with the air supply based on the performance of the compressor without the air supply. The compressor performance under full load, partial load, different superheat degrees and air supply working conditions can be calculated, the calculation precision is high, and the speed is high.

Description

technical field [0001] The invention relates to the technical field of simulation analysis, in particular to a performance simulation calculation method of a screw compressor. Background technique [0002] There are mainly three types of compressors used in air-conditioning units: centrifugal, screw and scroll. Screw compressors have the advantages of large cooling capacity, resistance to liquid shock, wide operating range, and high reliability. Therefore, screw chillers account for nearly half of the market. . In recent years, saving energy, improving energy utilization efficiency, protecting and improving the environment have become the general trend. The annual energy consumption of central air-conditioning accounts for 40% to 60% of the annual energy consumption of buildings, and the energy consumption of cold sources accounts for 60% of the design power of central air-conditioning systems. Therefore, chillers are the main source of central cooling for public buildings....

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the technical problem that the simulation calculation in the prior art cannot meet the performance prediction of large-scale variable working conditions, and provides a screw compressor performance simulation calculation method

Images