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Thermal resistance capacity model for the cold release characteristics of cemented paste backfill with phase change materials

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  • Wang, Mei
  • Shang, Shiyue
  • Liu, Lang
  • Wang, Yu
  • Huan, Chao

Abstract

A new method based on thermal resistance and capacity (RC) network model for fast predicting cold release characteristics of the cemented paste backfill with phase change materials is developed. The simplified heat transfer calculation model was established, and temperature variation was calculated by MATLAB. The RC model and program were validated by experimental results and numerical heat transfer simulations. Based on the verified RC model, the influence law of the initial ice-water ratio and slurry concentration were analyzed. With the increase of initial ice-water ratio and the decrease of slurry concentration, the cooling ability was enhanced and the cold release process was extended. Furthermore, the cemented paste backfill with ice and paraffin were compared. The cooling release effect of slurry containing ice grains was better than that of slurry containing paraffin throughout the melting process. Compared with the numerical heat transfer simulation method, RC model can effectively improve the calculation efficiency under the premise of satisfying the accuracy. This study is of great significance in providing a timely forecast of the cold release characteristics of the cemented paste backfill with phase change materials in engineering design and practice.

Suggested Citation

  • Wang, Mei & Shang, Shiyue & Liu, Lang & Wang, Yu & Huan, Chao, 2024. "Thermal resistance capacity model for the cold release characteristics of cemented paste backfill with phase change materials," Renewable Energy, Elsevier, vol. 222(C).
    • Handle: RePEc:eee:renene:v:222:y:2024:i:c:s0960148123018281
    DOI: 10.1016/j.renene.2023.119913
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    References listed on IDEAS

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