热泵直供采暖两相流毛细管网性能研究  

Study of two-phase flow performance of capillary net during heat pump heating

作　　者：王振辉[1] 杜少勋[1] 季文军[1] 高伟[2] 

机构地区：[1]河北科技大学机械工程学院,河北石家庄050018 [2]中国市政工程华北设计研究总院,天津300000

出　　处：《河北工业科技》2015年第4期347-352,共6页Hebei Journal of Industrial Science and Technology

摘　　要：通过在用户自定义程序增加两相流动中质量源项和能量源项的方法,建立了毛细管网内气-液转化的CFD计算模型,对小管径光滑铜管内R22的冷凝性能进行研究。根据CFD模型,计算了不同气相进口流速下R22蒸汽的冷凝过程。得到了压力损失、冷凝系数和流速的关联曲线。对小管径毛细管网辐射末端的设计提供了理论依据,对制冷剂流速选择有一定指导意义。In this paper,the gas-liquid conversion of CFD calculation model in capillary network is established by adding the quality source terms and energy source terms of two-phase flow in user-defined functions.Condensation performance of R22 in smooth tubes of small diameter is researched.The condensation process of R22 is calculated on different gaseous phase inlet flow velocity by CFD model.The pressure drop,the condensation coefficient and the velocity correlation curve are obtained.It provides a theory basis for the radiation end design of small diameter capillary net,and a guidance for the choosing of refriger-ant flow rate.

关 键 词：供热与供燃气工程 热泵 毛细管网 供暖 冷凝 两相流 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]