Discharge of a composite metal foam/phase change material to air heat exchanger for a domestic thermal storage unit
Discharge of a composite metal foam/phase change material to air heat exchanger for a domestic thermal storage unit
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DOI：
10.1016/j.renene.2019.10.084
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发表时间：
2020-04-01
期刊：
影响因子：
8.7
通讯作者：
Walker, Gavin S.
中科院分区：
文献类型：
--
作者：
Sardari, Pouyan Talebizadeh;Giddings, Donald;Walker, Gavin S.
本文评估了使用泡沫铜和 PCM 复合材料进行空间加热的 PCM（相变材料）到空气热交换器的放电机制。该复合系统采用 2-D 和 3-D 计算流体动力学方法对不同入口空气温度进行建模，以考虑室温的影响，使用多孔介质的热非平衡模型与热平衡模型进行比较。结果表明，与仅使用 PCM 的情况相比，复合换热器具有显着的优势。当入口空气温度为22℃时，与单独的PCM相比，复合材料单元的固化时间缩短了43%，回热率提高了73%。 10 h后，当入口空气温度为0℃和22℃时，复合系统的潜热储热换热系统的入口和出口之间的温度变化分别为41℃和34℃，而对于仅具有PCM的系统，入口和出口温度变化分别为33℃和29℃。这项研究表明，通过引入金属泡沫，PCM 在储能加热器中的应用是可能的，而仅使用 PCM 替代品是不可能实现这一点的。 (C) 2019 Elsevier Ltd. 保留所有权利。
This paper evaluates the discharging mechanism in a PCM (phase change material) to air heat exchanger for the purpose of space heating using a composite of copper foam and PCM. The composite system is modelled with both 2-D and 3-D computational fluid dynamics approach for different inlet air temperatures to consider the effect of room temperature using the thermal non-equilibrium model for the porous medium compared with the thermal equilibrium one. The results show the significant advantages of composite heat exchanger compared with a PCM only case. For the inlet air temperature of 22 degrees C, the composite unit is solidified in 43% shorter time with 73% higher heat retrieval rate compared with that for the PCM only. After 10 h, the temperature variation between the inlet and outlet of the air channels for latent heat storage heat exchanger system with the composite system is 41 degrees C and 34 degrees C for the inlet air temperatures of 0 degrees C and 22 degrees C, respectively, while it is 33 degrees C and 29 degrees C for the system with PCM only. This study show the possible usage of PCMs in the energy storage heaters by introducing metal foams which is not possible using PCM only alternatives. (C) 2019 Elsevier Ltd. All rights reserved.