Experimental investigation of the novel melting point modified Phase–Change material for heat pump latent heat thermal energy storage application

Xin Jin, Fengping Wu, Tao Xu, Gongsheng Huang, Huijun Wu, Xiaoqing Zhou, Dengjia Wang, Yanfeng Liu and Alvin CK. Lai

Energy, 2021, vol. 216, issue C

Abstract: The thermal properties of the heat storage medium integrated with the heat pump (HP) should be suitable for the desired application in terms of providing thermal comfort for the end–users and matching the operation condition of the HP. In this study, a novel melting point modified composite phase–change material (CPCM) was developed for air–source HP. We concluded that sodium acetate trihydrate (SAT) modified with 10 wt% acetamide, 4 wt% nucleator, and 4 wt% thickener, which yielded the desired melting point (47.8 °C) and high latent heat (219.8 kJ/kg) presented better thermal reliability than the other component groups. The coefficient of performance of HP with novel CPCM was significantly enhanced compared to that of SAT CPCM, in which the maximum difference was 13.2%. Moreover, the average temperature of the discharging water drained from the novel CPCM unit was 4 °C higher than that of the control group. The overall efficiency of the heating system containing novel CPCM shows an increasing trend with a higher flow rate within a certain range. The system exhibits a payback period of about 5 years and a high bill saving of HK$6627.62 (US$861.59) over a 10-year analysis compared with conventional heaters.

Keywords: Heat pump latent heat thermal energy storage; Inorganic phase–change material; Sodium acetate trihydrate; Melting point modification agent; Coefficient of performance; Energy utilization efficiency (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:216:y:2021:i:c:s0360544220322982

DOI: 10.1016/j.energy.2020.119191

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