折流板型太阳能空气集热器数值优化  

Numerical optimization of flat-plate solar air collector with internal baffles

作　　者：胡建军[1] 孙喜山[1] 徐进良[2] 

机构地区：[1]燕山大学建筑工程与力学学院,河北秦皇岛066004 [2]华北电力大学新能源与可再生能源北京市重点实验室,北京102206

出　　处：《燕山大学学报》2011年第5期417-422,共6页Journal of Yanshan University

基　　金：河北省自然科学基金青年基金资助项目(E2011203094);国家重点基础研究发展计划(973计划)资助项目(2011CB710703)

摘　　要：通过数值求解基于雷诺时均的三维定常粘性N-S方程及能量方程,改变结构、特性及运行参数,对折流板型太阳能空气集热器进行了数值优化,模拟结果表明:折流板的引入可有效提高集热效率,同时对于特定尺度的折流板集热器,存在最优分割腔数;增加集热器上部盖板的保温能力可有效提高集热效率,实际使用中推荐保温能力较好的双玻盖板或适当增加空气间层厚度;集热器的热损失以对流散热占主导,辐射散热为次要因素;运行参数如气温、日照强度等对集热器进出口温升影响显著,但对集热效率影响较小。The parameters of a solar air collector with internal baffles are optimized by numerically solving Reynolds-averaged N-S equations（RANS） and energy equations.The simulation results are obtained by changing the structure,the property of some components and the operating parameters.The obtained results show that the introduction of baffles can increase the collecting efficiency.For specific scale collector,there is an optimal chamber number.Enhancing the heat insulation of top cover plate can effectively improve the efficiency using double-glasses top cover plate or increasing the thickness of air gap properly.The convective heat loss of the top cover plate is dominative in the total heat loss,and the radiation heat loss is relatively little The operating parameters such as the surrounding temperature,solar radiation intensity have great influence on the temperature rise between inlet and outlet but have little influence on collecting efficiency.

关 键 词：太阳能 空气集热器 数值模拟 优化 

分 类 号：TK513[动力工程及工程热物理—热能工程]