變?nèi)萘侩p級(jí)壓縮系統(tǒng)壓縮機(jī)動(dòng)態(tài)耦合模型

金旭 王樹剛 張騰飛 李照義 祖豐

(1.大連理工大學(xué)建設(shè)工程學(xué)部大連116024：2.大連二洋明華電子有限公司開發(fā)部大連116600)

摘要：以低雎端為變頻雙轉(zhuǎn)子、高壓端為定頻單轉(zhuǎn)子的兩臺(tái)壓縮機(jī)構(gòu)成的雙級(jí)壓縮系統(tǒng)為研究對(duì)象，基于轉(zhuǎn)子雎縮機(jī)幾何模型，依據(jù)質(zhì)量與能量守恒方程.建立變?nèi)萘侩p級(jí)壓縮系統(tǒng)壓縮機(jī)動(dòng)態(tài)耦合模型，并利用試驗(yàn)塒模型進(jìn)行校核。基十模擬和試驗(yàn)結(jié)果，分析中fHj壓力、中間氣體溫度和高壓雎縮機(jī)捧氣溫度等參數(shù)隨時(shí)問和低壓壓機(jī)頻率的變化規(guī)律。結(jié)果表明.系統(tǒng)的中伽壓力、中問氣體溫度和高壓壓縮機(jī)排氣溫度具有脈動(dòng)特性;在蒸發(fā)溫度0℃，冷凝溫度40℃。低高壓壓縮機(jī)理論輸氣量比為2.82時(shí)，中『日J(rèn)壓力已接近冷凝壓力。系統(tǒng)將失去中補(bǔ)氣增焓效果;通過增人低壓壓縮機(jī)頻率可有效提高系統(tǒng)制熱量，但系統(tǒng)制熱性能系數(shù)(Coefficient ofPerformance for heating，COPh)改善較小，且COPhz*優(yōu)值所對(duì)應(yīng)的低壓壓縮帆頻率隨蒸發(fā)溫度的降低將逐漸增大。

關(guān)鍵詞：雙級(jí)壓縮變?nèi)萘哭D(zhuǎn)子壓縮機(jī)

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

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