紧凑型热管真空管集热器集热特性分析  

Thermal performance analysis of a compact heat-pipe evacuated tube collector

作　　者：支黎明 杨谋存[1] 朱跃钊[1] 姜琴 张志毅 王薪贺 ZHI Liming;YANG Moucun;ZHU Yuezhao;JIANG Qin;ZHANG Zhiyi;WANG Xinhe(College of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2023年第6期666-675,710,共11页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家重点研发计划(2018YFB1502900)。

摘　　要：为充分利用闲置建筑屋顶,为建筑和工业过程提供中温热能,设计了一种紧凑型热管真空管集热器(HPETC)。以南京地区为例,通过构建集热器传热热阻理论模型,并使用方差分析法,分析其集热特性。结果表明:集热器在523.15 K工作状态下具有24.56%的热效率;4种因素对热效率的影响程度从小到大分别为直射辐射、选择性吸收涂层(SAC)发射率、真空管内压力、进口温度;当真空管内压力小于0.01 Pa时,降低SAC发射率对热效率提升具有显著作用。To make full use of the idle roof and provide mid-temperature heat for construction and industrial processes,a compact heat-pipe evacuated tube collector(HPETC)was designed.A thermal resistance theoretical model of the collector was established,and the thermal performance of the collector in Nanjing area was analyzed by variance analysis.Results showed that the collector had a thermal efficiency of 24.56%at 523.15 K.The effect degree of four factors were sorted from small to big:direct radiation,emissivity of selective absorber coating(SAC),pressure of the vacuum tube and inlet temperature.When the pressure in the vacuum tube was less than 0.01 Pa,reducing the emissivity of SAC had a significance in the thermal efficiency.

关 键 词：紧凑型太阳能集热器 热管真空管 集热特性 热阻 方差分析法 

分 类 号：TK513.1[动力工程及工程热物理—热能工程]