中文摘要：

由于镜场辐射投射到吸热器受热面上同一目标点（即单点聚焦）,造成塔式太阳能腔式吸热器受热面热负荷呈现时间和空间分布的不均匀现象,导致系统工质流量分配特性恶化。搭建用于模拟蒸发受热面水动力特性的试验装置,利用低电压大电流变压器加热,得到各管流量分配及壁温分布规律。从试验角度弥补了腔式吸热器受热面的水动力特性研究的空白,有利于实现腔式吸热器向大容量、高效率、规模化方向发展。

英文摘要：

On account of one-target focus type of the heliostats in the tower solar power technology, the heat flux in the cavity receiver is non-uniform in time and space, which may lead to the panels burst or ablation due to the local over-heat in some extreme situation. In this work, an electrical heated evaporating experimental loop, including five parallel vertical tubes, is set up to evaluate the hydrodynamic characteristics of evaporation panels in a solar cavity receiver under various non-uniform heat fluxes. The influence of the heat flux concentration ratio, total flow rate, and system pressure on the flow distribution of parallel tubes is discussed. The hydrodynamic characteristics of working fluid in the heated surface of cavity receiver are obtained by performing experiments. This work offers information for development of large-capacity, high-efficiency, and large-scale cavity receivers.