基于高温工质R245fa的太阳能平板集热器集热过程动态模拟  

Dynamic simulation on thermal processes of flat-plate solar collector based on high temperature refrigerants R245fa

作　　者：白景辉[1] 马良栋[2] 张吉礼[2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]大连理工大学土木水利学院,辽宁大连116024

出　　处：《可再生能源》2009年第4期1-6,共6页Renewable Energy Resources

基　　金：大连市优秀青年科技人才基金项目(2008J23JH024);"十一五"国家科技支撑项目(2008BAJ12B05)

摘　　要：提出了一种以R245fa为循环工质的气液分离双级太阳能集热系统。对第一级集热系统的集热过程进行了动态数值模拟。结果表明,系统的集热过程受太阳辐射强度的影响最大,受系统启动温度的影响较小。当系统从环境温度启动达到工质蒸发状态时,减少循环工质的质量或增大集热面积均能有效地减少系统的运行时间,而增大系统集热面积是较佳方案。In this paper, the two-stage gas-liquid separated solar energy collector system is proposed. The thermal processes of the first circulation in the two-stage gas-liquid separated solar collection are investigated numerically. The new refrigerant R245fa was used as working fluid in this system. The results show that the thermal collection processes of the solar energy collection system is influenced strongly by the solar radiation, and the influence of the initial working fluid temperature and the ambient temperature on the thermal collection processes is weak by comparison with the solar radiation. In the processes of working fluid temperature raising from the ambient temperature to the evaporation state, the running time of the solar collection system can be decrease effectively if the total mass of the working fluid in the system is decreased or the area of solar collector is increased. And the scheme to increase area of solar collector is best by comparison with that to decrease total mass of the working fluid.

关 键 词：高温工质 平板型集热器 热过程 动态模拟 

分 类 号：TK515[动力工程及工程热物理—热能工程]