变容量双级压缩系统压缩机动态耦合模型
金旭 王树刚 张腾飞 李照义 祖丰
(1.大连理工大学建设工程学部大连116024：2.大连二洋明华电子有限公司开发部大连116600)
摘要：以低雎端为变频双转子、高压端为定频单转子的两台压缩机构成的双级压缩系统为研究对象，基于转子雎缩机几何模型，依据质量与能量守恒方程.建立变容量双级压缩系统压缩机动态耦合模型，并利用试验埘模型进行校核。基十模拟和试验结果，分析中fHj压力、中间气体温度和高压雎缩机捧气温度等参数随时问和低压压机频率的变化规律。结果表明.系统的中伽压力、中问气体温度和高压压缩机排气温度具有脉动特性;在蒸发温度0℃，冷凝温度40℃。低高压压缩机理论输气量比为2.82时，中『日J压力已接近冷凝压力。系统将失去中补气增焓效果;通过增人低压压缩机频率可有效提高系统制热量，但系统制热性能系数(Coefficient ofPerformance for heating，COPh)改善较小，且COPh最优值所对应的低压压缩帆频率随蒸发温度的降低将逐渐增大。
关键词：双级压缩变容量转子压缩机
Dynamic Coupled Model of Compressors in Two-stage CompressionSystem with Variable Capacity
JIN Xu WANG Shugan ZHANG Tengfeil Zhaoyi ZU Fen
(1.Faculty ofInfrastructure Engineering，Dalian University ofTechnology，Dalian 1 16024;2.Department of Research and Development，Dalian Sanyo Meica Electronics.Co.，Ltd.，Dalian 116600)
Abstract：A two-stage compression heat pump syste
m witll variable capacity has been studied,which consists of two compressorsincluding a double-rotor compressor with variable capacity for the low compression,and a single-rotor compressor for the highcompression.Acompressor dynamic coupled model ofa two-stage compression system wi山variable capacity is established,based Onthe compressor geometry,the mass and energy conservation equations.The model is finally vmfied by the experiment.The variations of the intermediate gas pressure and temperature，and the high compressor discharge temperature with time and low compressor frequency arc analyzed.The results show that the intermediate gas pressure and temperature,and the high compressor dischargetemperature ofthe system a他pulsatile.And when the evaporation and condensation temperatures equal respectively,and the ratio of theoretical displacement of the low compressor to that of the high one is 2.82.it is shown that the intermediate gas pressure will draw close to the condensation pressure and the enthalpy-increasing effect of the vapor injection will disappear.In addition，increasing the low compressor frequency Call improve the heating capacity significantly,but the coefficient of performance for heating(COPh)improves a little.However,the low compressor frequency corresponding to the optimal coPb increases with thedecrease ofthe cvapomfion temperature.
Key words：Two-stage compression Variable capacity Rotary compressor
更多内容详见附件：资料下载
