水平轴跟踪槽式太阳能集热器动态集热量计算与分析

Calculation and Analysis of Dynamic Solar Energy Heat Collection by Parabolic trough Horizontal Axis Tracking

介绍了两种槽式单轴太阳能集热跟踪模式,建立了一种适用于不同跟踪方式下槽式水平轴集热器的动态集热量计算模型和计算流程。以拉萨为例详细分析了水平东西轴,南北轴追踪模式下的集热器效率与集热量。结果表明,该地区槽式水平轴集热追踪方式对集热器效率的影响很小,对于供暖系统而言,采用东西轴跟踪比南北轴跟踪方式提高约7%的集热量。

This paper introduces two kinds of single-axis solar energy heat collection and tracking modes,a heat collection calculation model and calculation flow of horizontal axial collector with grooved surface are established for different regions,different times and different solar radiation intensities.Take Lhasa as an example,the collector efficiency and heat collection of horizontal east-west axis and north-south axis are analyzed in detail,the results show that,the efficiency of slot horizontal shaft collector in this area does not change with the change of tracking mode,with the horizontal layout of north and south focal lines,the east-west tracking mode is more conducive to increasing the heat collection,increasing the proportion by about 7%.