基于槽式集热器中抛物线的量化分析模型

Quantized analysis models for parabola of parabolic trough collector

针对带有管状接收器的槽式集热装置中所采用的抛物线,运用锥体光学法结合太阳形状模型对选择抛物线所需考虑的光学聚光比、光学利用率、误差造成影响的程度、所需镜面的材料以及镜面所承受的最大曲率等方面进行研究.结果表明:临界聚光比最大值为68.45;聚光比的理论最大值为215;所设计的集热器相对于传统集热器误差影响系数降低8.2%,曲面长度系数增加16.8%,曲率半径系数降低10.6%;所建立的模型可指导实际设计中选择合适的抛物线方程.

A series of models for parabola of solar parabolic trough collector with tubular receiver were built based on cone optics method and sun shape model,such as optical concentration ratio,optical efficiency,coefficient of error,consumption of reflector materials and radius of curvature.The results show that the maximum critical concentration ratio is 68.45,the maximum theoretical concentration ratio is 215.Compared with traditional collectors,the error factor of new collector reduces by 8.2%,the length factor increases by 16.8%,the curvature factor reduces by 10.6%.These models can by the guidance for selecting the parabola for a solar parabolic trough collector.