螺杆式冷水机组性能分析  

Performance analysis of screw chillers

作　　者：丁国良[1] 伏龙[1] 苏祖坚[1] 张春路[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：《制冷学报》2002年第3期57-57,共1页Journal of Refrigeration

基　　金：国家重点基础研究发展规划项目 (G2 0 0 0 0 2 63 0 9)

摘　　要：为预测螺杆冷水机组在不同结构参数下的变工况特性 ,提出了基本螺杆冷水机组 (Ⅰ型 )、带经济器一级节流螺杆冷水机组 (Ⅱ型 )和带经济器二级节流螺杆冷水机组 (Ⅲ型 )变工况稳态仿真模型 ,其主要部件模型包括不带经济器运行的压缩机、带经济器运行的压缩机、冷凝器、电子膨胀阀、以及蒸发器。仿真结果表明 :Ⅰ型冷水机组的性能可以通过调节膨胀阀开度得到明显的改善 ;Ⅱ型和Ⅲ型的COP比Ⅰ型都有明显提高 ;而Ⅲ型的性能最优 ,名义工况下的COP约高出Ⅰ型约 8% ,变工况下性能更为稳定。In order to predict performance variation of chillers with configurations and working conditions, steady state model for three types of screw chillers is set up, including basic type of screw chiller (Type l ), one stage compression chiller with economizer(Type ll) and two stage compression with economizer (Type lll). Simulation results show that the performance of Type l chiller can be improved by adjusting expansion valve. The COPs of both Type ll and Type lll are higher than type l. The type lll chiller has the best performance of all the three types with 8% higher COP than that of Type l.

关 键 词：螺杆式冷水机组 稳态仿真模型 COP 性能分析 膨胀阀 

分 类 号：TB657[一般工业技术—制冷工程]