Form-stable LiNO3-NaNO3-KNO3-Ca(NO3)2/calcium silicate composite phase change material (PCM) for mid-low temperature thermal energy storage

被引：61

作者：

Jiang, Zhu ^{[1
,2
]}

Leng, Guanghui ^{[2
]}

Ye, Feng ^{[2
]}

Ge, Zhiwei ^{[2
]}

Liu, Chuanping ^{[1
]}

Wang, Li ^{[1
]}

Huang, Yun ^{[2
]}

Ding, Yulong ^{[3
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China

[2] Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China

[3] Univ Birmingham, Ctr Cryogen Energy Storage, Birmingham B15 2TT, W Midlands, England

来源：

ENERGY CONVERSION AND MANAGEMENT | 2015年 / 106卷

基金：

英国工程与自然科学研究理事会; 中国国家自然科学基金;

关键词：

Thermal energy storage; Form-stable composite PCM; Mid-low temperature; LATENT-HEAT STORAGE; CONDUCTIVITY ENHANCEMENT; PERFORMANCE ENHANCEMENT; GRAPHITE; ERYTHRITOL; SYSTEM; POWER;

D O I：

10.1016/j.enconman.2015.09.035

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this paper, a novel form-stable LiNO3-NaNO3-KNO3-Ca(NO3)(2)/calcium silicate composite PCM was developed by cold compression and sintering. The eutectic quaternary nitrate is used as PCM, while calcium silicate is used as structural supporting material. X-ray Diffraction (XRD) shows the PCM and the supporting material have good chemical compatibility. This composite PCM has a low melting point (103.5 degrees C) and remain stable without decomposition until 585.5 degrees C. Moreover, this composite shows excellent long term stability after 1000 melting and freezing cycles. Thermal conductivity of the composite was measured to be 1.177 W m(-1) K-1, and that could be increased by adding thermal conductivity enhancers into the composite. Meanwhile, microstructure of the composite PCM is observed by scanning electron microscopy (SEM). Latent heat and heat capacity of the composite are measured by differential scanning calorimetry (DSC). This composite PCM with low melting temperature, high thermal conductivity and excellent stability could be used as a new PCM for mid-low temperature thermal energy storage (TES) system. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：165 / 172

页数：8

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