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Natural ventilation performance of solar chimney with and without earth-air heat exchanger during transition seasons

Author

Listed:
  • Long, Tianhe
  • Zhao, Ningjing
  • Li, Wuyan
  • Wei, Shen
  • Li, Yongcai
  • Lu, Jun
  • Huang, Sheng
  • Qiao, Zhenyong

Abstract

This study experimentally investigates the natural ventilation performance of a solar chimney (SC) integrated with an earth-air heat exchanger (EAHE) during the transition seasons. The experiment was conducted in a comparative manner under three operating modes: Mode A: SC operating with EAHE with the window closed; Mode B: SC operating with an open window with the same opening area as the cross-sectional area of the EAHE pipe, with the EAHE closed; Mode C: the operating mechanism was the same as that of Mode B with the window opening area doubled. The results showed that 24 h of natural ventilation was achieved for the three operating modes. However, the nocturnal ventilation driving force for Mode A was the heating effect of the subsoil, while that for Modes B and C was the heat released from the thermal mass. The average daytime and nocturnal airflow rates for Modes A, B, and C were 209 m3/h and 139 m3/h, 286 m3/h and 87 m3/h, and 340 m3/h and 80 m3/h, respectively. The 24 h overall heating and cooling capacities of the EAHE for Mode A were 19474 kJ and 2179 kJ, respectively. The SCEAHE system had an advantage in preserving acceptable indoor thermal comfort with a diurnal indoor temperature variation in the range 19.7–22.7 °C.

Suggested Citation

  • Long, Tianhe & Zhao, Ningjing & Li, Wuyan & Wei, Shen & Li, Yongcai & Lu, Jun & Huang, Sheng & Qiao, Zhenyong, 2022. "Natural ventilation performance of solar chimney with and without earth-air heat exchanger during transition seasons," Energy, Elsevier, vol. 250(C).
  • Handle: RePEc:eee:energy:v:250:y:2022:i:c:s0360544222007216
    DOI: 10.1016/j.energy.2022.123818
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    References listed on IDEAS

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    Cited by:

    1. Łukasz Amanowicz & Katarzyna Ratajczak & Edyta Dudkiewicz, 2023. "Recent Advancements in Ventilation Systems Used to Decrease Energy Consumption in Buildings—Literature Review," Energies, MDPI, vol. 16(4), pages 1-39, February.

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