Development of form stable Poly(methyl methacrylate) (PMMA) coated thermal phase change material for solar water heater applications

4th International Conference on Civil and Environmental Engineering for Sustainability

地球科学;生态环境科学;经济学

Munusamy, Y.^1 ; Shanmugam, S.^1 ; Shi-Ying, Kee^1

Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, Kampar, Perak

31900, Malaysia^1

关键词: Dicumyl peroxide;    Field emission scanning electron microscopy;    Latent heat of melting;    Narrow temperature ranges;    Phase change process;    Poly(methyl methacrylate) (PMMA);    Pressure build up;    Weight percentages;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/140/1/012008/pdf
DOI  :  10.1088/1755-1315/140/1/012008

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Phase change material (PCM) is one of the most popular and widely used thermal energy storage material in solar water heater because it able to absorb and release a large amount of latent heat during a phase change process over a narrow temperature range. However the practical application of PCM is limited by two major issues; 1) leakage which leads to material loss and corrosion of tank and 2) large volume change during phase change process which cause pressure build up in the tank. In this work, form-stable PCM was prepared by coating myristic acid with Poly(methyl methacrylate) (PMMA) to prevent leakage of PCM. PMMA was mixed with different weight percentage (0.1, 0.2, 0.3, 0.4 and 0.5 wt%) of dicumyl peroxide (DCP). The purpose of adding DCP to PMMA is to crosslink the polymer and to increase the mechanical strength of PMMA to hold the myristic acid content inside the coating during the phase change process. Leakage test results showed that PMMA mixed with 0.1% DCP exhibit 0% leakage. This result is further supported by Field Emission Scanning Electron Microscopy (FESEM) images and Fourier transform infrared spectroscopy (FTIR) analysis results, where a compact and uniform coating without cracks were formed for PCM coated with PMMA with 0.1% DCP. Differential scanning calorimetry (DSC) results shows that the melting point of form-stable PCM is 55°C, freezing point is 50°C, the latent heat of melting and freezing is 67.59 J/g.