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A modeling study on the heat storage and release characteristics of a phase change material based double-spiral coiled heat exchanger in an air source heat pump for defrosting

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  • Hu, Wenju
  • Song, Mengjie
  • Jiang, Yiqiang
  • Yao, Yang
  • Gao, Yan

Abstract

There were very limited modeling studies are around a phase change material based double-spiral coiled heat exchanger, due to the difficulties of model development and the lack of mature simulation tools. When a phase change material based double-spiral coiled heat exchanger applied in an air source heat pump for defrosting, its model development becomes more complicated. To solve this fundamental problem, a mathematical model for such heat exchanger was developed, as well as the numerical solution method proposed. To improve the convergence and the speed of numerical simulation of the phase change material’s heat transfer process, both of special treatments in space and time were conducted. According to the circular shape boundary, an implicit solution method was used to reduce the number of grids so that computation became convenient. Heat storage and release processes of this model were finally experimentally validated in a specially built heat pump system during frosting and defrosting, respectively. The deviation conditions are demonstrated acceptable with the mean average temperature differences at the small range of −0.71–1.64 °C. Potential uses and limitations of the modeling work are also further discussed. Contribution of this work are meaningful for the optimization of heat pump and any other systems, where applied a phase change material based heat exchanger.

Suggested Citation

  • Hu, Wenju & Song, Mengjie & Jiang, Yiqiang & Yao, Yang & Gao, Yan, 2019. "A modeling study on the heat storage and release characteristics of a phase change material based double-spiral coiled heat exchanger in an air source heat pump for defrosting," Applied Energy, Elsevier, vol. 236(C), pages 877-892.
    • Handle: RePEc:eee:appene:v:236:y:2019:i:c:p:877-892
    DOI: 10.1016/j.apenergy.2018.12.057
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    References listed on IDEAS

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    1. Song, Mengjie & Xia, Liang & Mao, Ning & Deng, Shiming, 2016. "An experimental study on even frosting performance of an air source heat pump unit with a multi-circuit outdoor coil," Applied Energy, Elsevier, vol. 164(C), pages 36-44.
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    Cited by:

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    2. S. A. M. Mehryan & Kaamran Raahemifar & Leila Sasani Gargari & Ahmad Hajjar & Mohamad El Kadri & Obai Younis & Mohammad Ghalambaz, 2021. "Latent Heat Phase Change Heat Transfer of a Nanoliquid with Nano–Encapsulated Phase Change Materials in a Wavy-Wall Enclosure with an Active Rotating Cylinder," Sustainability, MDPI, vol. 13(5), pages 1-20, March.
    3. Zhao, B.C. & Wang, R.Z., 2020. "A novel 3-D model of an industrial-scale tube-fin latent heat storage using salt hydrates with supercooling: A model validation," Energy, Elsevier, vol. 213(C).
    4. Cong Zhou & Yizhen Li & Fenghao Wang & Zeyuan Wang & Qing Xia & Yuping Zhang & Jun Liu & Boyang Liu & Wanlong Cai, 2023. "A Review of the Performance Improvement Methods of Phase Change Materials: Application for the Heat Pump Heating System," Energies, MDPI, vol. 16(6), pages 1-21, March.
    5. Lin, Ying & Fan, Yubin & Yu, Meng & Jiang, Long & Zhang, Xuejun, 2022. "Performance investigation on an air source heat pump system with latent heat thermal energy storage," Energy, Elsevier, vol. 239(PA).
    6. Sun, Bo & Huang, Shifang & Su, Wei & Lu, Lin & Zhang, Xiaosong, 2023. "A comprehensive analysis of the minimum energy and thermodynamic efficiency of regenerating aqueous electrolyte solutions in air-conditioning systems," Energy, Elsevier, vol. 284(C).
    7. Mazhar, Abdur Rehman & Zou, Yuliang & Liu, Shuli & Shen, Yongliang & Shukla, Ashish, 2022. "Development of a PCM-HE to harness waste greywater heat: A case study of a residential building," Applied Energy, Elsevier, vol. 307(C).

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