Performance analysis of heat storage of direct-contact heat exchanger with phase-change material
Performance analysis of heat storage of direct-contact heat exchanger with phase-change material
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DOI：
10.1016/j.applthermaleng.2013.03.041
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发表时间：
2013-09-01
影响因子：
6.4
通讯作者：
Akiyama, Tomohiro
中科院分区：
文献类型：
--
作者：
Nomura, Takahiro;Tsubota, Masakatsu;Akiyama, Tomohiro
本文介绍了利用相变材料(PCM)、赤藓糖醇(熔点391K)和导热油(HTO)改善直接接触式换热器的蓄热性能。蓄热单元采用内径200 mm、高1400 mm的垂直圆柱体。在HSU的底部放置了一个垂直向下的喷嘴。利用温度效率和蓄热率两个特征参数，考察了相变材料在HSU中的高度对蓄热的影响。结果表明，随着相变材料高度的增加，这两个参数都随着相变材料高度的增加而增大，这是由于滞留时间随相变材料高度的增加而增加。(C)2013爱思唯尔有限公司。保留所有权利。
This paper describes the improvement of the heat-storage performance of a direct-contact heat exchanger using the phase-change material (PCM) erythritol (melting point: 391 K) and a heat transfer oil (HTO). A vertical cylinder with 200-mm inner diameter and 1400-mm height was used as the heat-storage unit (HSU). A nozzle pointing vertically downwards was placed on the bottom of the HSU. We examined the effect of the height of the PCM in HSU on heat storage, using two characteristic parameters: temperature effectiveness and the rate of heat storage. According to the results, both of these parameters increase during the increase in latent heat storage with the height of PCM, due to the increase in the residence time with the height of PCM. (C) 2013 Elsevier Ltd. All rights reserved.