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Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat Collection

Author

Listed:
  • Hongbing Chen

    (School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China)

  • Rui Zhao

    (State Key Laboratory of Building Safety and Environment, China Academy of Building Research, Beijing 100013, China)

  • Congcong Wang

    (School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China)

  • Lianyuan Feng

    (School of Civil Engineering, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, China
    Hebei Technology Innovation Center of Phase Change, Thermal Management of Data Center, Cangzhou 061001, China)

  • Shuqian Li

    (School of Civil Engineering, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, China
    Hebei Technology Innovation Center of Phase Change, Thermal Management of Data Center, Cangzhou 061001, China)

  • Yutong Gong

    (School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China)

Abstract

In this paper, a new type of microencapsulated phase change materials (MPCMs) with docosane as the core and titanium dioxide (TiO 2 ) as the shell was prepared by in situ polymerization. Its phase transition temperature was approximately 40 °C, and it can be used as a phase change material (PCM) in a low-temperature solar heat collection system. The properties of the new material were examined including the microstructure, the chemical elements on the surface of the microcapsules, and thermal conductivity. In addition, to obtain the optimized formula of the microcapsules, single-factor analysis on the emulsifier type, its mass fraction, ultrasonic oscillation time, pH, and core–shell ratio were performed. The results showed that the MPCMs prepared in this paper had a particle size of 2–5 μm and were spherical. Its surface was uniform and smooth without cracks, and the TiO 2 was well dispersed around the docosane, completely coating the docosane without impurities. The MPCMs had good performance in terms of thermal properties and heat storage when using 0.40% SDS as an emulsifier, 10 min ultrasonic, a 3.5 pH value, and a 1:1 core–shell ratio. However, the stirring method, time, and experimental reaction temperature also affected the properties of the material, which was not studied in this experiment. We will continue to study these factors in the future.

Suggested Citation

  • Hongbing Chen & Rui Zhao & Congcong Wang & Lianyuan Feng & Shuqian Li & Yutong Gong, 2022. "Preparation and Characterization of Microencapsulated Phase Change Materials for Solar Heat Collection," Energies, MDPI, vol. 15(15), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:15:p:5354-:d:870118
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    References listed on IDEAS

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    1. Chai, Luxiao & Wang, Xiaodong & Wu, Dezhen, 2015. "Development of bifunctional microencapsulated phase change materials with crystalline titanium dioxide shell for latent-heat storage and photocatalytic effectiveness," Applied Energy, Elsevier, vol. 138(C), pages 661-674.
    2. SarI, Ahmet & Alkan, Cemil & Karaipekli, Ali, 2010. "Preparation, characterization and thermal properties of PMMA/n-heptadecane microcapsules as novel solid-liquid microPCM for thermal energy storage," Applied Energy, Elsevier, vol. 87(5), pages 1529-1534, May.
    3. Zhao, Aiqin & An, Jinliang & Yang, Jinglei & Yang, En-Hua, 2018. "Microencapsulated phase change materials with composite titania-polyurea (TiO2-PUA) shell," Applied Energy, Elsevier, vol. 215(C), pages 468-478.
    4. Yu, Shiyu & Wang, Xiaodong & Wu, Dezhen, 2014. "Microencapsulation of n-octadecane phase change material with calcium carbonate shell for enhancement of thermal conductivity and serving durability: Synthesis, microstructure, and performance evaluat," Applied Energy, Elsevier, vol. 114(C), pages 632-643.
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    Cited by:

    1. Chengcheng Wang & Hongkun Ma & Abdalqader Ahmad & Hui Yang & Mingxi Ji & Boyang Zou & Binjian Nie & Jie Chen & Lige Tong & Li Wang & Yulong Ding, 2022. "Discharging Behavior of a Fixed-Bed Thermochemical Reactor under Different Charging Conditions: Modelling and Experimental Validation," Energies, MDPI, vol. 15(22), pages 1-16, November.

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