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Computational fluid dynamics (CFD) modelling of air flow field, mean age of air and CO2 distributions inside a bedroom with different heights of conditioned air supply outlet

Author

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  • Ning, Mao
  • Mengjie, Song
  • Mingyin, Chan
  • Dongmei, Pan
  • Shiming, Deng

Abstract

It was revealed in a previous related study that for an air conditioning (A/C) system used in a sleeping environment, the height of its supply air outlet would significantly affect its ventilation performance in terms of effectiveness. To further examine the underlying reasons of the differences in ventilation performance, the air flow field, distributions of mean age of air, air change efficiency and distributions of CO2 concentrations inside an experimental bedroom were numerically studied using CFD method under five different settings, where its supply air outlet was positioned at 5 different heights. The study results suggested that positing a supply air outlet at a lower level was effective in both saving energy and removing the exhaled CO2 in a breathing zone, and when a supply outlet was positioned at a higher level, less CO2 was removed from the region near the mouth of a sleeper.

Suggested Citation

  • Ning, Mao & Mengjie, Song & Mingyin, Chan & Dongmei, Pan & Shiming, Deng, 2016. "Computational fluid dynamics (CFD) modelling of air flow field, mean age of air and CO2 distributions inside a bedroom with different heights of conditioned air supply outlet," Applied Energy, Elsevier, vol. 164(C), pages 906-915.
    • Handle: RePEc:eee:appene:v:164:y:2016:i:c:p:906-915
    DOI: 10.1016/j.apenergy.2015.10.096
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    Cited by:

    1. Balvís, Eduardo & Sampedro, Óscar & Zaragoza, Sonia & Paredes, Angel & Michinel, Humberto, 2016. "A simple model for automatic analysis and diagnosis of environmental thermal comfort in energy efficient buildings," Applied Energy, Elsevier, vol. 177(C), pages 60-70.
    2. Zhonghua Zhang & Lingjie Zeng & Huixian Shi & Hua Liu & Wenjun Yin & Haowen Shen & Libin Yang & Jun Gao & Lina Wang & Yalei Zhang & Xuefei Zhou, 2021. "CFD Study on the Ventilation Effectiveness in a Public Toilet under Three Ventilation Methods," Energies, MDPI, vol. 14(24), pages 1-25, December.
    3. Shengwei Zhu & Tong Lin & John D. Spengler & Jose Guillermo Cedeño Laurent & Jelena Srebric, 2022. "The Influence of Plastic Barriers on Aerosol Infection Risk during Airport Security Checks," Sustainability, MDPI, vol. 14(18), pages 1-14, September.
    4. Yu, Yan S.W. & Sun, Daming & Zhang, Jie & Xu, Ya & Qi, Yun, 2017. "Study on a Pi-type mean flow acoustic engine capable of wind energy harvesting using a CFD model," Applied Energy, Elsevier, vol. 189(C), pages 602-612.
    5. Li, Han & Fu, Zheng & Xi, Chang & Li, Nana & Li, Wei & Kong, Xiangfei, 2022. "Study on the impact of parallel jet spacing on the performance of multi-jet stratum ventilation," Applied Energy, Elsevier, vol. 306(PB).
    6. Pouranian, Fatemeh & Akbari, Habibollah & Hosseinalipour, S.M., 2021. "Performance assessment of solar chimney coupled with earth-to-air heat exchanger: A passive alternative for an indoor swimming pool ventilation in hot-arid climate," Applied Energy, Elsevier, vol. 299(C).
    7. Jae-Sol Choi & Jae-Hyuk Lee & Eui-Jong Kim, 2018. "Effects of ERV Filter Degradation on Indoor CO 2 Levels of a Classroom," Sustainability, MDPI, vol. 10(4), pages 1-15, April.
    8. Kong, Xiangfei & Xi, Chang & Li, Han & Lin, Zhang, 2020. "Multi-parameter performance optimization for whole year operation of stratum ventilation in offices," Applied Energy, Elsevier, vol. 268(C).

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