微热管阵列平板太阳集热器的数值模拟与优化  

NUMERICAL SIMULATION AND OPTIMIZATION OF A NOVEL FLAT PLATE SOLAR COLLECTOR WITH MICRO HEAT PIPE ARRAY

作　　者：邓月超[1] 赵耀华[1] 王林成[1] 叶三宝[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《太阳能学报》2014年第9期1646-1652,共7页Acta Energiae Solaris Sinica

基　　金：北京市自然科学基金(3121002)

摘　　要：介绍一种全新的平板式太阳集热器，该集热器应用微热管阵列作为集热元件，具有成本低、抗冻、承压、不易结垢、易与建筑一体化等优点。对其瞬时热性能进行的实验研究表明，该集热器瞬时效率曲线的截距达83．1％，斜率为-4．77。建立了微热管阵列平板太阳集热器的CFD模型，对集热器内部流体流动与换热进行数值模拟，模拟结果与实验结果吻合较好，从而验证了模型的可靠性。采用CFD模型对集热器干式接触式换热器进行优化，结果表明，该集热器循环水的最佳流量为0．1-0．2kg／（m2·S），水流量较低时，采用直内肋管可适当提高集热效率，随着流量的增加，管内加肋对集热器性能的提高影响不大。In this study, a novel flat plate solar collector with micro heat pipe array was proposed. One such flat plate solar collector shows many advantages, such as： much cheaper, absence of freezing, high pressure resistance, easy integration into buildings etc. A thermal performance experimental study was conducted, focusing on the collector efficiency. The results showed that the collector＇s maximum instantaneous efficiency is up to 83.1% and the total heat loss factor is 4.77. A CFD model was developed to analyze the fluid flow and heat transfer within the collector, the instantaneous efficiency was compared with experimental resuhs and there is a good agreement. Optimal study Was conducted for the heat exchanger with dry type by CFD simulation, and the results showed that the optimal mass flow rate is 0.1-0.2 kg/（m2-s）, and the heat exchanger with fins has better efficiency at low mass flow rate than without fins.

关 键 词：微热管阵列 新型平板太阳集热器 CFD模拟 干式接触式换热器 质量流量 

分 类 号：TK519[动力工程及工程热物理—热能工程]