磁悬浮变频冷水机组运行特性  

Operation characteristics of magnetic bearing variable frequency chillers

作　　者：朱顺 周爱民[2] 陈晨 文键[1] 谢昊琳 李科[1] ZHU Shun;ZHOU Aimin;CHEN Chen;WEN Jian;XIE Haolin;LI Ke(School of Energy and Power Engineering,Xi′an Jiaotong University,Xi′an 710049,Shaanxi Province,China;Wuhan Second Ship Design and Research Institute,Wuhan 430205,Hubei Province,China)

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]武汉第二船舶设计研究所,湖北武汉430205

出　　处：《化学工程》2024年第8期31-36,共6页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(22308273)。

摘　　要：为深入研究磁悬浮冷水机组在不同工况下的运行特性,采用集中参数法稳态模型,建立磁悬浮变频离心压缩机模型、冷凝器模型、电子膨胀阀模型和蒸发器模型为一体的冷水机组数学模型,对比分析磁悬浮冷水机组和传统冷水机组在不同负荷率、不同冷却水温度和不同冷冻水流量下的冷水机组效率。结果表明:磁悬浮冷水机组在低负荷率下效率较高,而传统冷水机组效率最高点出现在额定工况;冷却水进水温度由30℃降低至20℃时,磁悬浮冷水机组和传统冷水机组性能系数C_(OP)均会升高,但磁悬浮冷水机组的C_(OP)提高幅度大于传统冷水机组,当系统负荷率P LR为0.6时,传统冷水机组C_(OP)提高14%,磁悬浮冷水机组C_(OP)提高68%;冷冻水流量由150 m^(3)/h降低至60 m^(3)/h时,传统冷水机组效率提高1.4%,磁悬浮冷水机组效率提高4.9%。模拟结果可为磁悬浮冷水机组的运行调控策略提供一定的理论参考。In order to conduct in-depth research on the operating characteristics of MBVFC(magnetic bearing variable frequency chillers)under different operating conditions,the lumped parameter method was used to establish the steady-state model of the maglev compressor,the condenser model,the electronic expansion valve model and the evaporator model.The efficiency of the MBVFC and the ordinary chillers were compared and analyzed under different partial load rates P LR,different cooling water temperatures and different chilled water flows.The results show that the efficiency of MBVFC is higher at low P LR,while the highest efficiency of ordinary chiller occurs at the rated condition.When the temperature of inlet cooling water is reduced from^(3)0℃to 20℃,theC_(OP)of MBVFC and ordinary chillers increases,but the increase ofC_(OP)of the MBVFC is greater than that of the ordinary chillers.When the system P LR is 0.6,theC_(OP)of ordinary chillers increases by 14%,and theC_(OP)of MBVFC increases by 68%.When the chilled water flow is reduced from 150 m^(3)/h to 60 m^(3)/h,the efficiency of the ordinary chiller increases by 1.4%,and the efficiency of the MBVFC increases by 4.9%.The results can provide some suggestions for the operation control strategy of MBVFC.

关 键 词：磁悬浮压缩机 冷水机组 运行特性 效率 

分 类 号：TB652[一般工业技术—制冷工程]