Long, Tianhe;
Zhao, Ningjing;
Li, Wuyan;
Wei, Shen;
Li, Yongcai;
Lu, Jun;
Huang, Sheng;
(2022)
Natural ventilation performance of solar chimney with and without earth-air heat exchanger during transition seasons.
Energy
, 250
, Article 123818. 10.1016/j.energy.2022.123818.
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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.
| Type: | Article |
|---|---|
| Title: | Natural ventilation performance of solar chimney with and without earth-air heat exchanger during transition seasons |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.energy.2022.123818 |
| Publisher version: | https://doi.org/10.1016/j.energy.2022.123818 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10147899 |
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