槽式太阳能集热系统动态性能与试验方法研究

槽式集热系统作为太阳能热发电核心部件,该文围绕系统热效率制定性能评价指标,应用动态试验方法绘制效率曲线,依据指标评价集热器在不同工况及环境下的光热性能。基于延庆1 MW槽式太阳能热发电验收性能试验和德令哈50 MW槽式光热发电数据收集,对影响集热系统的传热流体流量、环境温度变化、风速和聚光角度偏差等因素进行数值研究,结果表明不同天气条件下热性能变化显著,进行模型的多元回归后,得到差异较大的动态测试模型判定系数,通过分析得到集热系统最优判定指标。

Solar field of parabolic trough is the core part of solar thermal power generation.The performance evaluation index is set by thermal efficiency and the efficiency curve is plotted by dynamic test method.The solar energy thermal performance is evaluated in different conditions and ambient according to the index.Data collection is based upon performance test for acceptance of 1 MW parabolic trough solar thermal power generation case in Yanqing and 50 MW parabolic trough solar power generation case in Delingha.Numerical research on factors such as thermal fluid flow rate,ambient temperature,wind speed and angle deviation of light concentration which affect collector system is carried out.The results showed that the thermal performance varied significantly in different weather conditions.The determination coefficient of the dynamic test model is obtained using multiple regression of the model.The optimal index of heat collection system is obtained by analysis.