Development of a new composite material for building energy storage based on lauric acid-palmitic acid-paraffin ternary eutectic and expanded perlite. (September 2022)

• Record Type: Journal Article
• Authors: Fan, Zhixuan; Zhao, Yunchao; Liu, Xuying; Shi, Yu; Jiang, Dahua
• Is Part Of: Journal of energy storage. Volume 53(2022)
• Publication Date: 2022-09
• Subjects: Fatty acid -- Paraffin -- Building thermal storage -- Expanded perlite; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2022.105136
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: Building thermal energy storage is critical to global sustainability as building energy consumption rises. In this study, a lauric-palmitic acid-paraffin ternary eutectic (LPP) was prepared from lauric acid, palmitic acid, and paraffin, and this LPP eutectic was adsorbed into expanded perlite (EP) via vacuum adsorption method to form a composite phase change material (LPP/EP). Leakage tests show that the maximum loading rate of EP on LPP is 75 %. Then, the chemical structure, crystal structure, crystalline morphology, micromorphology, and thermal property of LPP/EP were evaluated by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Polarizing Optical Microscope (POM), scanning electronic microscopy (SEM), differential scanning calorimetry (DSC), and thermogravimetric analysis (TG). The results show that LPP/EP has superior crystal and chemical compatibility, LPP/EP melts at 31.78 °C and absorbs 117.34 J/g of latent heat, and LPP/EP has good thermal stability. Meanwhile, LPP/EP exhibits better thermal storage performance than EP. In addition, the 1000 melting-solidifying cycling experiment indicates that the LPP/EP has excellent durability. Therefore, the LPP/EP composite phase change materials will have an amazing performance in the field of building thermal energy storage. Highlights: The LPP/EP for building thermal energy storage was prepared, and the maximum loading rate was determined to be 75 %. The melting temperature and latent heat of LPP/EP are 31.78 °C and 117.34 J/g, respectively. The energy storage capacity of LPP/EP has significant improvement compared to EP. LPP is chemically compatible with EP, and LPP/EP has good thermal stability and durability.