摘要
对一种大直径三维内肋管进行了管内对流换热实验研究,实验结果显示,与光滑管相比,其强化换热因子hl/hs在1.65～1.70之间,而压降比ΔPl/ΔPs在1.65～1.89之间;基于对换热和管壁温度影响因素的分析,提出了一种新型气-气换热器,并研究和提出了该换热器的设计计算方法;通过工程实例表明,该换热器管壁温不仅比光滑管换热器明显提高,而且换热能力提高约20%;另外,与其它类型的换热器比较,具有较高的综合性能。
This paper conducts in-tube heat transfer experiments in a three dimensional fin tube with 102 mm outer diameter. Compared with the smooth tube,the heat transfer enhancement ratio is between 1.65 and 1.7,and the pressure drop ratio is between 1.65 and 1.7. Based on the analysis of the heat transfer and tube surface temperature,a new type heat exchanger is put forward. Moreover,the design and calculation method is explored. The engineering example indicate that not only the tube surface temperature is higher than the smooth tube,but also the quantity of heat is increased by about 20% than the smooth tube. Compared with other types,the new type heat exchanger has a overall better performance.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第10期57-63,共7页
Journal of Chongqing University
基金
重庆大学骨干教师专项经费资助项目(713411001)
关键词
大直径三维内肋管
强化换热
壁面温度
换热器
a three dimensional fin tubes
the heat transfer enhancement
the surface temperature
the heat exchanger
