Thermal performance and pressure drop in a ceramic heat exchanger evaluated using CFD simulations
Thermal performance and pressure drop in a ceramic heat exchanger evaluated using CFD simulations
复制标题
DOI：
10.1016/j.energy.2012.02.012
复制
发表时间：
2012-09
期刊：
影响因子：
9
通讯作者：
Deiglys Borges Monteiro;P. Mello
中科院分区：
文献类型：
--
作者：
Deiglys Borges Monteiro;P. Mello
对于热电厂中使用的能够支持高温（通常高于800°C）的热交换器，有一个潜在的需求。这些热交换器可用于实施EFGT（外燃燃气轮机）循环。为了支持这些工作条件，在长时间内，热交换器应该用足够的材料建造。陶瓷在之前的很多作品中都被认为是一种选择。本文介绍了单板翅陶瓷换热器的CFD模拟结果。在雷诺数为500到1500之间的范围内，根据CFD计算结果评估了科尔本系数和摩擦系数的相关性。这些关系式可用于陶瓷换热器的热设计。对一种结构相似的紧凑型换热器进行了仿真与实验验证。
There is one potential demand for heat exchangers capable of supporting high temperatures, typically higher than 800 °C, for use in thermal power plants. These heat exchangers could be used in the implementation of EFGT (Externally Fired Gas Turbines) cycles. To support these working conditions, during long periods of time, the heat exchanger should be constructed with adequate materials. Ceramics has been considered by many previous works as a choice. This work presents the results obtained with CFD simulations of one plate-fin ceramic heat exchanger. Correlations for the Colburn and friction factors, for a range of Reynolds number between 500 and 1500, are evaluated from the numerical results obtained with CFD. These correlations may be used for the thermal design of ceramic heat exchangers. One validation procedure is conducted comparing the simulation results with experimental data for a compact heat exchanger of similar configuration.