复合储热型蒸发体的蒸发性能研究  

Evaporation Performance of the Solar Evaporator With Composite Heat Storage

作　　者：段慧玲 王一丁 付小强 DUAN Huiling;WANG Yiding;FU Xiaoqiang(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学电气与动力工程学院,南京211100

出　　处：《工程热物理学报》2025年第4期1288-1293,共6页Journal of Engineering Thermophysics

摘　　要：为了弥补太阳能的间歇性在光热蒸发过程中的不足,本文制备了一种储热型蒸发体,采用石蜡泡沫金属作为复合相变储热材料。阐明了在吸热和放热阶段,石蜡泡沫金属复合相变材料内部的传热规律。储热单元的存在,使蒸发体在无光照条件下的蒸发性能提升了63.83%。石蜡泡沫金属组成的复合相变材料的相变时间缩短50%以上,内部的温度分布更加均匀,可以提高蒸发体在无光照条件下的蒸发性能。分析了金属泡沫的填充率和布置方式对传热性能及蒸发性能的影响。在50%填充率时,泡沫金属井字型布置的蒸发性能最优。本文制备的复合储热型蒸发体为一体式结构,结构简单,可弥补太阳能稳定性不足的问题,为太阳能驱动的水分蒸发的持续稳定进行提供了条件。In order to make up for the intermittent shortage of solar energy,a kind of solar evap-orator with heat storage unit is prepared in this paper.The composite phase change material is composed of paraffin and metal foam.The heat transfer and evaporation of evaporator with com-posite heat storage unit in light and dark are studied in depth.The presence of heat storage unit has improved the evaporation performance in dark by 63.83%.The phase change time of the composite phase change material is reduced by more than 50%,and the internal temperature distribution is more uniform,which can improve the evaporation performance of the evaporator in the absence of light.Effects of filling ratio and arrangement of metal foam on heat transfer and evaporation are analyzed.When the filling ratio is 50%and the metal foam is arranged in a well-shaped pattern,the evaporation performance is optimal.The evaporator with composite heat storage unit prepared in this paper has an integrated structure.It can compensate for the intermittency of solar energy and provide opportunities for the continuous and stable evaporation of water driven by solar energy.

关 键 词：复合储热 太阳能蒸发 金属泡沫 蒸发性能 传热性能 

分 类 号：TK11[动力工程及工程热物理—热能工程]