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Experimental investigation on thermal performance of porous composite phase change storage device under different operating modes and parameters

Author

Listed:
  • Fan, Man
  • Luan, Zhaoyang
  • Li, Han
  • Kong, Xiangfei
  • Kang, Yiting

Abstract

To promote the transformation from traditional heating to clean heating, the electric heat storage technology is gradually gaining attention. This study prepared a new kind of porous phase change bricks with high heat storage density and thermal conductivity, and constructed a new type of phase change storage device with multi-airflow channels for space heating. Under different operating modes and conditions, a series of experiments were conducted to analyze the heat storage/release performance, energy conversion efficiency and internal temperature distribution. When the heating power increased from 1000 W to 1400 W, the heat storage efficiency increased by 7.3% and the exergy efficiency decreased by 2.6% in Case I (heat storage mode). The rise in outlet wind speed improved the heat output capacity, yet the exergy performance varied in different modes. When the outlet wind speed increased from 0.05 m/s to 0.2 m/s, the heat release efficiency increased by 27.3% in Case II (heat release mode) and 8.3% in Case III-b (simultaneous heat storage and release mode). The exergy efficiency increased by 6.3% in Case II and dropped by 4.6% in Case III-b. In addition, the internal temperature uniformity (Sx) was mainly affected by the distribution of heat sources and airflow.

Suggested Citation

  • Fan, Man & Luan, Zhaoyang & Li, Han & Kong, Xiangfei & Kang, Yiting, 2024. "Experimental investigation on thermal performance of porous composite phase change storage device under different operating modes and parameters," Energy, Elsevier, vol. 294(C).
    • Handle: RePEc:eee:energy:v:294:y:2024:i:c:s0360544224006352
    DOI: 10.1016/j.energy.2024.130863
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