基于动态传热分析的平板型太阳能集热器设计软件开发

Development of Flat Plate Solar Collector Design Software Based on Dynamic Heat Transfer Analysis

平板型太阳能集热器的热性能受到环境因素、运行条件和设计因素的共同影响。为提升太阳能热利用工程的应用效果,需要针对环境和运行条件,对平板型太阳能集热器进行优化设计。本研究通过分析平板型太阳能集热器内部以及与环境间导热、对流、热辐射等动态传热过程,建立了计算集热量、集热效率以及集热器瞬时效率曲线的平板型太阳能集热器三维动态传热模型与差分求解算法,开发了具有传热过程分析和运行性能预测的平板型太阳能集热器设计软件,提高了不同环境因素、设计因素以及运行参数影响下集热器热性能分析速度和准确度。

Thermal performance of flat plate solar collector(FPC) is affected by environmental situations, operating conditions, and design factors. In order to improve the application effect of solar thermal utilization engineering, it is necessary to optimize the design of flat plate solar collector according to the environment and operating conditions. In this study, the dynamic heat transfer processes such as heat conduction, convection, and heat radiation inside and between the flat-plate solar collector and the environment have been analyzed. Then a three-dimensional dynamic heat transfer model and a differential solution algorithm have been developed to calculate heat gain, collector efficiency and instantaneous efficiency curve of the flat plate solar collector. With this model, a Flat Plate Collector Design Software with heat transfer process analysis and operational performance prediction has been accomplished. Compared with traditional methods, this software greatly improved speed and accuracy of FPC thermal performance analysis under different environmental conditions, design factors and operation parameters.