磁悬浮变频冷水机组运行特性
Operation characteristics of magnetic bearing variable frequency chillers
朱顺 1周爱民 2陈晨 2文键 1谢昊琳 1李科1
作者信息
- 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
- 折叠
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COP均会升高,但磁悬浮冷水机组的COP提高幅度大于传统冷水机组,当系统负荷率PLR为0.6 时,传统冷水机组COP提高14%,磁悬浮冷水机组COP提高68%;冷冻水流量由150 m3/h降低至60 m3/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.
Abstract
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 PLR,different cooling water temperatures and different chilled water flows.The results show that the efficiency of MBVFC is higher at low PLR,while the highest efficiency of ordinary chiller occurs at the rated condition.When the temperature of inlet cooling water is reduced from 30℃ to 20℃,the COP of MBVFC and ordinary chillers increases,but the increase of COP of the MBVFC is greater than that of the ordinary chillers.When the system PLR is 0.6,the COP of ordinary chillers increases by 14％,and the COP of MBVFC increases by 68％.When the chilled water flow is reduced from 150 m3/h to 60 m3/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Key words
maglev compressor/chillers/operating characteristics/efficiency引用本文复制引用
基金项目
国家自然科学基金资助项目(22308273)
出版年
2024
国家科技期刊平台
NSTL
万方数据