Use of polyethylene glycol for the improvement of the cycling stability of bischofite as thermal energy storage material
Use of polyethylene glycol for the improvement of the cycling stability of bischofite as thermal energy storage material
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DOI：
10.1016/j.apenergy.2015.05.040
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发表时间：
2015-09-15
期刊：
影响因子：
11.2
通讯作者：
Grageda, Mario
中科院分区：
文献类型：
--
作者：
Gutierrez, Andrea;Ushak, Svetlana;Grageda, Mario
水氯镁石是非金属采矿业的副产品。水氯镁石是一种相变储能材料，但其循环稳定性较差，因此本文研究了水氯镁石与添加剂的混合物。由于聚乙二醇（PEG）本身就是一种PCM，本文将不同分子量的PEG作为添加剂添加到水氯镁石（PCM）中以改善其热性能。结果表明，在水氯镁石中加入5%的PEG 2000，在不影响其熔融温度的情况下，其相变材料的循环稳定性更好，熔融热也没有明显降低。该研究表明，将无机PCM与有机添加剂混合可以是改善PCM的热性能的良好选择。(C)2015爱思唯尔有限公司版权所有。
Bischofite is a by-product of the non-metallic mining industry. It has been evaluated as phase change material in thermal energy storage, but it shows little cycling stability, therefore in this paper the mixture of bischofite with an additive was studied. Since polyethylene glycol (PEG) is a PCM itself, in this paper PEG (with different molecular weights) is used as additive in a PCM (bischofite) to improve its thermal behaviour. Results show that adding 5% PEG 2 000 to bischofite gives a more cycling stable PCM without affecting its melting temperature neither decreasing significantly its heat of fusion. This research shows that mixing an inorganic PCM with an organic additive can be a good option to improve the thermal performance of the PCM. (C) 2015 Elsevier Ltd. All rights reserved.