双热源复合换热器复合换热温差影响因素分析  

The influence factors of the compound heat-exchanging temperature difference of dual-source compound heat-exchanger

作　　者：张超[1] 董家昀[1] 赵晓丹[2] 周光辉[1] 

机构地区：[1]中原工学院能源与环境学院,郑州450007 [2]中原工学院信息商务学院,郑州450007

出　　处：《低温与超导》2012年第7期68-72,共5页Cryogenics and Superconductivity

基　　金：河南省基础与前沿技术研究项目(082300460150;092300410176)

摘　　要：空气-水双热源复合换热器是太阳能-空气双热源复合热泵系统的核心部件,空气-水双热源复合换热器的有效复合换热温差对空气-水双热源复合换热器的换热性能以及太阳能-空气双热源复合热泵的系统性能具有重要影响。建立了空气-水双热源复合换热器和太阳能-空气双热源复合热泵系统的数学模型,利用数学模拟的方法研究了空气-水双热源复合换热器结构参数,即内外管径、翅片间距对有效复合换热温差的影响。模拟结果表明:空气-水双热源复合换热器的有效复合换热温差随内管管径的减小、外管管径的增大以及翅片间距的减小而增大。The air - water dual - source compound heat - exchanger is the key component of the solar - air dual - source compound heat pump system. The heat - exchanging performance of the air - water dual - source compound heat - exchanger and the system performance of the solar - air dual - source compound heat pump system largely depend on the effective compound heat - exchanging temperature difference of the air - water dual - source compound heat - exchanger. The mathematic models of the air - water dual - source compound heat - exchanger and the solar - air dual - source compound heat pump system were estab- lished, and the mathematic simulation was used to study the effect of the structure parameters of air - water dual - source com- pound heat - exchanger such as the tube diameter and the fin space on the effective compound heat - exchanging temperature difference. The simulated results show that the effective compound heat - exchanging＇temperature difference of the air - water dual - source compound heat - exchanger increases while the inner - tube diameter and the fin space decrease, and the outer - tube diameter increases.

关 键 词：双热源 复合换热器 复合换热温差 

分 类 号：TK124[动力工程及工程热物理—工程热物理]