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Experimental and numerical investigations on radiant floor heating system integrated with macro-encapsulated phase change material

Author

Listed:
  • Chen, Weicheng
  • Liu, Yangxi
  • Liang, Xianghui
  • Luo, Fan
  • Liao, Tingting
  • Wang, Shuangfeng
  • Gao, Xuenong
  • Zhang, Zhengguo
  • Fang, Yutang

Abstract

Macro-encapsulated phase change material (PCM) with PCM as core and polymer as shell is reported an extremely stable energy storage medium in radiant floor heating system (RFHS). Herein, RFHS-based rooms with and without macro-encapsulated PCM are built, and the comfort and economy of the corresponding rooms are evaluated. Experimental results show that the room with macro-encapsulated PCM has longer thermal comfort time and slighter temperature deviation than without, according to the comfort standard. Then, a 3D unsteady heat transfer model is established and corrected by experimental data. Results show that macro-encapsulated PCM as temperature buffer layer regulates the heating-cooling rate of room and forms a semi-elliptic air radiant temperature zone. The room with macro-encapsulated PCM has lower daily electricity cost (c‾) of 0.2595 CNY/day and higher comfort time ratio of inside air (t‾) of 80.88%, decreased by 36.71% and increased by 15.43% than without, respectively. The thermal conductivities of shell and core of macro-encapsulated PCM are orthogonally optimized to be respectively 0.25 and 1.00 W/(m·K), with lowest c‾ (0.2480 CNY/day) and higher t‾ (85.47%), decreased by 4.43% and increased by 5.67% than pre-optimization. When the ambient temperature changes within −10∼10 °C, the input power of the room with macro-encapsulated PCM is orthogonally optimized to save c‾ by 35.91%∼39.39% than without.

Suggested Citation

  • Chen, Weicheng & Liu, Yangxi & Liang, Xianghui & Luo, Fan & Liao, Tingting & Wang, Shuangfeng & Gao, Xuenong & Zhang, Zhengguo & Fang, Yutang, 2023. "Experimental and numerical investigations on radiant floor heating system integrated with macro-encapsulated phase change material," Energy, Elsevier, vol. 282(C).
    • Handle: RePEc:eee:energy:v:282:y:2023:i:c:s0360544223017693
    DOI: 10.1016/j.energy.2023.128375
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    References listed on IDEAS

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