摘要
以核电站乏燃料水池散热及太阳能热利用等为应用背景,实验分析了R134a作为工质的分离式热管在不同热源温度和不同充液率条件下的换热特性。在热源温度从40℃以5℃间隔递增到65℃的条件下,共进行了6组不同的充液率实验,分别为43.7%,51.7%,60.1%,68.5%,75.2%,82.9%。实验结果表明,系统充液率达到68.5%以后,换热量和换热系数随着充液率的增加波动小,存在最佳充液率区间,并且管内蒸发温度和换热量随着热源温度的升高而升高。与氨工质关于蒸发段换热系数和换热量两方面进行数据分析对比,结果表明随着充液率的增加,两种工质在管内换热系数和换热量上存在较大差异。
An experimental study on heat transfer of a R134 a separated heat pipe,which could be used for heat transmit of spent fuel pool and solar energy heater,was carried out under different operating conditions of external heat source temperature and filling ratio. There were six different filling ratio being studied,43. 7%,51. 7%,60. 1%,68. 5%,75. 2% and 82. 9% respectively. The external heat temperature ranged from 40℃ to 65℃,increased by 5℃. According to the results of the experiment,the heat pipe is stable on heat transfer when the filling ratio is over 68. 5%. The higher the external heat source temperature,the higher the evaporation temperature and the higher heat exchange. When compared with the experiment using ammonia on heat transfer coefficient and heat exchange,characteristics of heat transfer is significantly different.
出处
《低温与超导》
CAS
北大核心
2014年第12期1-5,40,共6页
Cryogenics and Superconductivity
基金
国家自然科学基金(51206110)
科技部重大技术专项(ZB01K04)
关键词
分离型热
R134A
氨
充液率
Separate heat pipe
R134a
Ammonia
Filling ratio
