中文摘要：

八达岭1Mw塔式太阳能腔式吸热器已于2011年8月成功生产出过热蒸汽。由于太阳辐照随时间变化的特点，腔式吸热器各受热面能流密度分布极不均匀。为了研究腔式吸热器的运行安全性，文中根据八达岭1Mw塔式太阳能过热型腔式吸热器蒸发受热面的结构形式，建立了7通道蒸发受热面动态仿真数学模型。该模型能够反映不同蒸发受热面工质流量随能流密度变化的规律性，更好地模拟吸热器动态特性。在此基础上，通过仿真实验分析了过热型腔式吸热器运器运行安全性。对于蒸发受热面，最危险的工况是在高负荷时太阳辐照突然增强；对于过热受热面，最危险的工况是，高负荷时汽轮机调节汽门突然关小。

英文摘要：

The Superheating cavity receiver of Badaling 1 MW solar thermal power plant had produced successfully superheated steam in August 2011. Because the direct normal irradiation value is changing with time, flux density on each evaporating heating surfaces is different and Superheator has occurred deformation. According to structure of evaporating heating surfaces of Badaling 1 MW solar thermal power plant receiver, a 7-channel evaporator heating surface dynamic simulation model is developed. This model could better simulate the dynamic characteristics of receiver. Basis on the model, this paper analyzed the operation security of the overheating cavity receiver. For evaporative heating surfaces, the most dangerous working condition is a sudden increase in solar irradiance at the high load; for superheator, the most dangerous working condition is a sudden decrease in the turbine regulating valve at the high load.