槽式太阳能聚光集热器传热性能研究  

Study on Heat-transfer Characteristics of a Parabolic Trough Solar Collector

作　　者：王修彦[1] 韩露[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《动力工程学报》2017年第4期307-312,共6页Journal of Chinese Society of Power Engineering

基　　金：国家重点基础研究发展计划资助项目(973项目)(2009CB219801)

摘　　要：建立了槽式太阳能聚光集热器单侧吸收高热流密度的传热数学模型.该传热数学模型将金属吸热管壁面所能接受到的非均匀热流简化为矩形分布,考虑了金属吸热管管壁的周向导热,选取Dudley的试验数据验证了传热数学模型的可靠性并分析了影响集热器传热特性的主要因素.通过Fluent软件研究了槽式太阳能聚光集热器金属吸热管的周向温度分布规律.结果表明:该传热数学模型具有一定可靠性;流体温度、太阳辐射强度和流体体积流量是影响集热器管内换热特性和管壁周向温度分布的主要因素.To study the heat-transfer characteristics of a parabolic trough solar collector （PTC）, a mathe- matical heat-transfer model was established under the circumferentially non-uniform heat flux boundary conditions, which simplifies the heat flux of absorber into rectangular distribution, considering the circumferential heat conduction of tube walls. The reliability of the model was validated with Dudley experimental data in the literature, while main factors influencing the heat-transfer characteristics were studied, and the circumferential distribution of temperature on absorber surface was analyzed by Fluent simulation. Results show that the mathematical model is reliable in calculating the heat-transfer performance of PTC. The fluid temperature and mass flow rate as well as solar radiation intensity are the main factors influencing the heat-transfer characteristics and circumferential wall temperature distribution of PTC.

关 键 词：槽式太阳能聚光集热器 非均匀热流 传热特性 周向温度分布 

分 类 号：TK513.1[动力工程及工程热物理—热能工程]