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research-article

Thermal stability experimental study on three types of organic binary phase change materials applied in thermal energy storage system

[+] Author and Article Information
Song Mengjie

Energy Research Institute at NTU (ERI@N), Research Techno Plaza, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore; Department of Energy Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, China
mengjie.song@gmail.com

Liao Liyuan

Department of Energy Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, China
liliyuan@163.com

Niu Fuxin

Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, AL 35478, USA
fniu@crimson.ua.edu

Mao Ning

College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, Shandong, China
maoningcas@hotmail.com

Liu Shengchun

Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin, China
liushch@tjcu.edu.cn

Hu Yanxin

Department of Energy Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, China
huyanxin825@foxmail.com

1Corresponding author.

ASME doi:10.1115/1.4039702 History: Received September 06, 2017; Revised January 24, 2018

Abstract

Phase change materials (PCMs) are widely applied in recent decades due to their good thermal performance in energy systems. Their applications are mainly limited by the phase change temperature and latent heat. Many publications are reported around the characteristic improvement of binary organic PCMs. The thermal stability study on organic binary PCMs used in thermal energy storage applications becomes fundamental and meaningful. In this study, thermal stability of three types of organic binary PCMs was experimentally investigated, which are frequently used in building and industry applications. To qualitatively investigate the stability of composite PCMs, DSC and FT-IR spectra testing of samples were also conducted. Experimental results showed that, the selected composite PCMs, CA&MA, had the best thermal performances, with its phase change temperature unchanged and heat of fusion decreased only 8.88 J/g, or 4.55%, after 2,000 thermal cycles. Furthermore, quality ratio of required PCMs as the variation of operation duration was analyzed to quantitatively prepare the materials. The PCMs can successfully operate about 3,125 times when prepared as 1.20 times of its calculated value by starting fusion heat. Conclusions of this research work can also be used for guiding the selection and preparation of other energy storage materials.

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