氨系统循环倍率对换热影响的理论分析  

Theoretical Analysis of Influence of Circulating Ratio on Heat Transfer in Ammonia Refrigeration System

作　　者：唐俊杰[1] 王昕[1] 张海南[2,3] 马进[4] 司春强[4] 邵双全[2] 

机构地区：[1]北京二商集团有限责任公司西郊食品冷冻厂,北京100081 [2]中国科学院理化技术研究所,北京100190 [3]中国科学院大学,北京100049 [4]国内贸易工程设计研究院,北京100069

出　　处：《制冷技术》2014年第5期31-33,53,共4页Chinese Journal of Refrigeration Technology

基　　金：北京市重点基金(D13110600430000)

摘　　要：为研究循环倍率对氨制冷系统换热性能的影响,基于管内强制对流换热经验公式建立模型。通过仿真计算分析了质量流速、循环倍率、霜层厚度等系统换热性能的影响。结果表明,相比霜层厚度增加,降低循环倍率对换热性能的影响较小,但对提高氨系统安全性有重要意义。In order to study the effect of circulating ratio on heat transfer performance in ammonia refrigeration system, the model was built based on the heat transfer experience formula of forced convection in tube. The influences of mass flow rate, circulating ratio and frost layer thickness on heat transfer were analyzed by numerical simulation. The results show that, reducing circulating ratio had little effect on the heat transfer performance comparing with the frost layer thickness, but it was important for ammonia system security.

关 键 词：氨系统 换热 循环倍率 霜层 

分 类 号：TB611[一般工业技术—制冷工程]