第38参第4期 2016年8月
土术建筑与环境工程
Journal of Civil,Architectural &. Environmental Engineering
doi;10. 11835/j.issn. 1674-4764. 2016. 04. 009
槽式太阳能集热器传热模型及性能分析
陈玉英
（兰州交通大学环境与市政工程学院，兰州730070）
Vol. 38 No. 4 Aug.2016
摘要：槽式太阳能集热器一维和二维传热数学模型是一组非线性代数方程，为改进求解的稳定性和计算精度，将槽式太阳能集热器一维和二维传热模型的求解看作有约束优化问题，建立了集热器传热过程求解的有约束优化数学模型，应用MATLAB软件优化函数fmincon进行求解。分析了传热流体入口温度及太阳能辐射热流密度变化对集热器性能的影响。采用fmincon函数求解集热器传热过程，计算速度快，计算过程稳定。分析表明，传热流体温度变化对集热器效率的影响大于太阳能辑射热流密度对集热器效率的影响
关键词：槽式集热器；太阳能；传热；MATLAB
中图分类号：TK512
文章编号：1674-4764(2016)04-0053-06
文献标志码：A
Performance analysis and heat transfermodelbuilding of
parabolictrough solarcollector
ChenYuying
(School of Environmental and Municipal Engineering- Lanzhou Jiaotong University, Lanzhou 730o70, P. R. China)
Abstract: One-dimensional and two-dimensional heat transfer mathematic model of the parabolic trough solar collector are a set of nonlinear algebra equations. In order to promote the stability and accuracy of the solution , the calculation of the heat transfer model of the parabolic trough solar energy collector is treated as constrained optimum problem+ the energy conservation equations and heat transfer equations are converted into optimization model, the optimization model is solved by using fmincon function in MATLAB optimization tool box. The influences of heat transfer fluid inlet temperature and solar radiation flux to heat collector coefficient are analyzed. The solution of heat collector heat transfer process is faster and more stable by using fmincon function. Results show that the variation of heat transfer fluid inlet temperature
plays more important role on heat collector coefficient than that of the variation of solar radiation flux. Keywords: parabolic trough collector; solar energy: heat transfer; MATLAB
槽式聚焦太阳能集热器是一种高效的太阳能热利用集热器，广泛用于太阳能热力发电、物料干燥，海水淡化等领域[1-5]。槽式太阳能集热器性能涉及聚焦器、集热器的光学性质、集热器复杂的传热过程、集热器结构等着诸多方面，就其传热模型，传热性能来说，学者们对其进行了不同程度的研究。文
收稿日期：2016-01-10
献6」基于热平衡方法，建立了对吸热器直接加热的实验装置，对集热器热损失进行了研究。由于对抛物面聚焦集热器整体进行实验研究受到多方面的限制，而基于热平衡法的实验研究缺乏对包括聚光器、传热流体在内的集热器整体性能的认识，基于集热器传热模型建立与求解的数值模拟分析方法受到
作者简介：陈玉英（1976-），女，主要从事强化传热研究，（E-mail)chenyy@mail.lzjtu.cn。 Received: 201601-10
Author brief: Chen Yuying(1976-) , main research interest ; enhancement of heat transfer, (E-mail)chenyy@mail. Izjtu. cn.