Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 87, Issue -, Pages 138-145Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2016.04.024
Keywords
Phase change material; CA-PA-SA ternary eutectic mixture; Expanded graphite; Low-temperature thermal energy storage
Funding
- National Natural Science Foundation of China [U1507201]
- Guangdong Natural Science Foundation [2014A030312009]
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This paper demonstrated a capric acid-palmitic acid-stearic acid ternary eutectic mixture/expanded graphite (CA-PA-SA/EG) composite phase change material (PCM) for low-temperature heat storage. The CA-PA-SA ternary eutectic mixture with a mass ratio of CA:PA:SA = 79.3:14.7:6.0 was prepared firstly, and its mass ratio in the CA-PA-SA/EG composite can reach as high as 90%. The melting and freezing temperatures of CA-PA-SA/EG composite were 21.33 degrees C and 19.01 degrees C, and the corresponding latent heat were 131.7 kJ kg(-1) and 127.2 kJ kg(-1). The CA-PA-SA/EG composite powders can be formed into round blocks by dry pressing easily, with much higher thermal conductivity than CA-PA-SA. Thermal performance test showed that the increasing thermal conductivity of CA-PA-SA could obviously decrease the melting/cooling time. Thermal property characterizations after 500 heating/cooling cycles test indicated that CA-PA-SA/EG composite PCM had excellent thermal reliability. Based on all these results, CA-PA-SA/EG composite PCM is a promising material for low-temperature thermal energy storage applications. (C) 2016 Elsevier Ltd. All rights reserved.
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