塔式太阳能发电多孔介质吸热器传热研究

Research on Porous Media Receiver Heat Transfer of Solar Power Tower Plant

为研究多孔介质结构参数对塔式太阳能多孔介质吸热器传热传质特性的影响,建立容积式吸热器稳态传热模型,在总结一般多孔介质容积换热系数模型的基础上,利用实验数据提出针对太阳能多孔介质吸热器的容积换热系数模型,并与实验数据进行比较,验证了所提模型的可靠性。采用数值方法对吸热器传热模型进行求解,并分别分析孔隙率、平均颗粒直径、厚度与入口空气速度对温度场的影响,为同类型太阳能吸热器的设计和改造提供了参考。

In order to investigate the influences of the structure parameters on the heat transfer characteristics of a porous media solar power tower plant volumetric receiver,the mass and heat transfer models in the porous media solar receiver was proposed,volume convection heat transfer coefficient models in the porous media was summarized,a novel convection heat transfer model according to the porous media solar receiver based on the literature data was developed,and the validity by the literature data was testified.The heat transfer equations were solved by numerical method,and the typical influences of the porosity,average particle diameter,air inlet velocity,and thickness on the temperature distribution were analyzed.The research results of the structure parameters influences on the temperature field can provide a reference for this type of receiver design and reconstruction.