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Preparation and assessment of paraffin/SiO2composite phase change material based on the efficacy coefficient method

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Abstract

Latent heat thermal energy storage by using phase change materials (PCMs) to store and release thermal energy is considered to be an efficient, environmental and promising thermal energy storage method for energy conservation. The advantages of PCMs on thermal energy storage works are in terms of keeping constant temperature during the phase change process. It is especially important for researching and developing phase-change materials (PCMs) with low operation cost, simple process, stable performance and favorable durability. In this study, paraffin/SiO2 composite phase-change materials (CPCMs) were prepared with cheap and environmental paraffin as the core material and with industrial water glass for the preparation of the nano-SiO2 as the shell material and characterized. From the technological parameters of CPCMs, select 8 items and analyze data by comprehensive assessment based on the efficacy coefficient method. It was indicated seepage circle, coating rate, phase-change enthalpy, mass loss ratio, density, thermal conductivity and temperature regulation performance are positive response. When the paraffin/water ratio was 1:4, pH is 4.5, the temperature is 35°Cand the paraffin/hydrated silica ratio is 2:1, the system efficacy coefficient of the optimum parameters is 0.8162and it’s the most significant. The method is effectively used to analyze the optimum value and could be significant in material optimization for next experiments.

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Acknowledgment

This work was supported by the Application technology research and development funds for the technology division of Deyang [number: 2015ZZ037].

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Authors and Affiliations

  1. Deyang Research Center of Building Materials and Environmental Resource Engineering Technology, Sichuan College of Architectural Technology, Deyang, 618000, China

    Min Hu & Na Guo

  2. School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, 116024, China

    Min Hu & Lijiu Wang

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  1. Min Hu
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  2. Na Guo
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  3. Lijiu Wang
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Correspondence to Min Hu.

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Hu, M., Guo, N. & Wang, L. Preparation and assessment of paraffin/SiO2composite phase change material based on the efficacy coefficient method. Heat Mass Transfer 56, 1921–1929 (2020). https://doi.org/10.1007/s00231-020-02830-z

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