槽式太阳能聚光集热系统模拟研究

Simulation of trough solar concentration system

针对抛物槽式太阳能聚光集热系统光学及几何特性随季节和时间不断变化,需要实时反映单位聚光集热量和集热效率使换热系统精确地蓄、放热,以提高太阳能热发电效率,建立了集热系统数学模型,利用酒泉地区春分、夏至、冬至的实测气象数据对抛物槽式太阳能聚光集热系统进行模拟研究。结果表明,在太阳直射辐照度相同的情况下,太阳入射角越小,集热效率越高。模拟结果将为槽式太阳能电站换热储热系统提供理论依据。

For the optical and geomelyical characteristics changing with lhe seasons and lime of parabolic trough type solar heating system, it needs to reflect the unit corcentrated heat and collection efficiency to make the heat exchange system accurately store and emit heat, improving the efficiency of solar thermal power generation. The mathematical model of the heating system was built and the measured meteorological data of vernal equinox, summer solstice, winter solstice in Jiuquan region wus used to simulate parabolic trough type solar heating system. Results show that with the same direct normal insolation, the smaller solar incident angle is, the higher collection efficiency is. Simulation results can be the theory basis of solar heat storage system.