螺杆冷水机组动态仿真  

DYNAMIC SIMULATION OF SCREW LIQUID CHILLERS

作　　者：伏龙[1] 丁国良[1] 张春路[1] 苏祖坚[1] 

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200030

出　　处：《低温工程》2002年第6期5-10,共6页Cryogenics

基　　金：国联合技术公司 (UnitedTechnologies);国家重点基础研究发展规划项目 (批准号 :G2 0 0 0 0 2 6 30 9)

摘　　要：给出了螺杆冷水机组动态过程模型。其中 ,壳管式冷凝器和满液式蒸发器被分成制冷剂侧、管壁、壳体以及水侧等四个控制容积。针对每个控制容积建立了质量或能量平衡的微分方程。由于螺杆压缩机和电子膨胀阀具有较小的热惯性 ,因而采用稳态模型描述压缩过程和膨胀过程。通过“自适应步长”方法实现了系统仿真。仿真结果与测试数据吻合良好。In this paper,a dynamic model of screw liquid chillers is presented The shell and tube condenser and flooded evaporator are divided into four control volumes including refrigerant side, tube wall, shell wall and water side Time dependent ordinary differential equations are obtained from the mass and energy balances for each control volume As the screw compressor and electronic expansion valve (EEV) have very small thermal inertia, steady state models are applied for the compression and throttling processes System simulation is finally carried out with'adaptive integration step'method The results simulated are in good agreement with the data measured

关 键 词：动态仿真 螺杆冷水机组 中央空调系统 结构 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]