Thermal performance analyses of porous media solar receiver with different irradiative transfer models
Thermal performance analyses of porous media solar receiver with different irradiative transfer models
复制标题
DOI：
10.1016/j.ijheatmasstransfer.2014.06.035
复制
发表时间：
2014-11
影响因子：
5.2
通讯作者：
Fuqiang Wang;Jianyu Tan;Shuai Yong;H. Tan;S. Chu
中科院分区：
文献类型：
--
作者：
Fuqiang Wang;Jianyu Tan;Shuai Yong;H. Tan;S. Chu
多孔介质中辐射传输问题的计算方法主要有两种：P1近似和Rosseland近似。本文通过数值模拟的方法，研究了在集中热流分布条件下，不同的辐射传热模型对多孔介质太阳能集热器传热性能的影响。将蒙特卡罗射线追踪（MCRT）方法和FLUENT软件与用户自定义函数（UDF）相结合，建立了Rosseland近似和修正P1近似下的局部非平衡热方程（LNTE）模型。数值结果表明，修正的P1近似和Rosseland近似下多孔介质太阳能接收器的最大温差很小。Rosseland近似条件下的热非平衡区厚度小于修正P1近似条件下的热非平衡区厚度。
There are two commonly used methods for irradiative transfer problems in porous media: P1 approximation and Rosseland approximation. In this study, the effects of irradiative transfer models on heat transfer performance of porous media solar receiver under concentrated heat flux distribution are numerically investigated. By combining the Monte Carlo Ray Tracing (MCRT) method and FLUENT software with user defined functions (UDFs), the local non-equilibrium thermal equation (LNTE) model with both the Rosseland approximation and modified P1 approximation are established. The numerical results indicate that the maximum temperature difference of porous media solar receiver between the modified P1 approximation and Rosseland approximation is small. The thickness of thermal non-equilibrium region is smaller for the Rosseland approximation condition than that for the modified P1 approximation condition.