Thermodynamic and thermal energy storage properties of a new medium-temperature phase change material
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Phase change materials (PCMs) that can store the heat energy obtained from intermittent solar irradiation are very important for solar energy absorption cooling system. In this work, an organic compound that melts at the temperature of 368.2 ± 0.5 K was applied as PCM. The specific heat capacities of the PCM were measured by temperature-modulated differential scanning calorimetry from 198.15 to 431.15 K. The thermodynamic functions of [HT–H298.15] and [ST–S298.15] were then calculated based on the measured heat capacities data. Afterward, the long-term cyclic thermal energy storage stability and thermal stability of the PCM were investigated. The results show that the PCM melted and crystallized at about 368 and 364 K, respectively, with a phase change enthalpy (ΔtransH) of 21 kJ mol−1 (130 J g−1). Additionally, it exhibited good long-term cyclic thermal energy storage stability and thermal stability. Hence, the PCM could be applied as good PCM for solar energy absorption cooling.
KeywordsPhase change materials Solar absorption cooling Thermal energy storage Thermodynamic properties
This work was supported by the Natural Science Foundation of Hunan Province, China (2017JJ1026, 13JJ3068), the Scientific Research Fund of Hunan Provincial Education Department (15B0002) and the Guangxi Key Laboratory of Information Materials (Guilin University of Electronic Technology), P.R. China (171001-K).
- 7.Zeng J-L, Chen Y-H, Shu L, Yu L-P, Zhu L, Song L-B, et al. Preparation and thermal properties of exfoliated graphite/erythritol/mannitol eutectic composite as form-stable phase change material for thermal energy storage. Sol Energy Mater Sol Cells. 2018;178:84–90. https://doi.org/10.1016/j.solmat.2018.01.012.CrossRefGoogle Scholar
- 18.Seo J, Shin D. Size effect of nanoparticle on specific heat in a ternary nitrate (LiNO3–NaNO3–KNO3) salt eutectic for thermal energy storage. Appl Therm Eng. 2016;102:144–8. https://doi.org/10.1016/j.applthermaleng.2016.03.134.CrossRefGoogle Scholar
- 21.Zhang X, Chen X, Han Z, Xu W. Study on phase change interface for erythritol with nano-copper in spherical container during heat transport. Int J Heat Mass Transf. 2016;92:490–6. https://doi.org/10.1016/j.ijheatmasstransfer.2015.08.095.CrossRefGoogle Scholar
- 22.Kholmanov I, Kim J, Ou E, Ruoff RS, Shi L. Continuous carbon nanotube–ultrathin graphite hybrid foams for increased thermal conductivity and suppressed subcooling in composite phase change materials. ACS Nano. 2015;9(12):11699–707. https://doi.org/10.1021/acsnano.5b02917.CrossRefPubMedGoogle Scholar
- 26.Rivière L, Caussé N, Lonjon A, Dantras É, Lacabanne C. Specific heat capacity and thermal conductivity of PEEK/Ag nanoparticles composites determined by modulated-temperature differential scanning calorimetry. Polym Degrad Stab. 2016;127:98–104. https://doi.org/10.1016/j.polymdegradstab.2015.11.015.CrossRefGoogle Scholar
- 30.Yanshan L, Shujun W, Hongyan L, Fanbin M, Huanqing M, Wangang Z. Preparation and characterization of melamine/formaldehyde/polyethylene glycol crosslinking copolymers as solid–solid phase change materials. Sol Energy Mater Sol Cells. 2014;127:92–7. https://doi.org/10.1016/j.solmat.2014.04.013.CrossRefGoogle Scholar
- 35.Zhang XF, Wang SF, Wu ZS. Physical chemistry. Wuhan: Huazhong University of Science & Technology Press; 2012.Google Scholar