塑料管单效溴化锂吸收式制冷机系统设计及传热性能分析

Analysis of Heat Transfer Performance and Design of Single-effect Lithium Bromide-water Absorption Chillers Using Plastic Pipes

溴化锂吸收式制冷机在工业中有着广泛的应用,但传热管腐蚀及其引起的冷量衰减一直以来是人们难以解决的问题,采用塑料传热管代替铜传热管来解决这个难题。进行了塑料换热装置及制冷机系统的结构设计,塑料换热装置的传热管采用聚四氟乙烯塑料管,传热管布置为阿基米德螺线状盘管。通过对塑料换热装置传热性能的分析,在溴化锂吸收式制冷机组中,吸收器使用聚四氟乙烯换热器代替传统的金属换热器具有最大的实用价值。

There are extensive applications of lithium bromide-water absorption chillers in industry,but the heat exchanger corrosion and refrigerating capacity loss are very difficult to be solved.In our research,the problem was solved by using plastic heat transfer pipes instead of copper pipes.The plastic heat exchangers and lithium bromide-water absorption chillers using plastic pipes were designed.The heat transfer pipes of plastic heat exchangers were poly tetra fluoro ethylene（PTFE） pipes.And the disposal of heat transfer pipes was Archimedean spiral pipes.In addition,the heat transfer performance of plastic heat exchangers was analyzed.The result shows that the absorber using PTFE pipes instead of traditional metal pipes can be most use value in lithium bromide-water absorption chillers.