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Comparison of air-conditioning systems with bottom-supply and side-supply modes in a typical office room

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  • Zheng, Chenxiao
  • You, Shijun
  • Zhang, Huan
  • Zheng, Wandong
  • Zheng, Xuejing
  • Ye, Tianzheng
  • Liu, Zeqin

Abstract

The growing energy consumption and thermal comfort of an air-conditioned room have attracted increasing public attention. As such, the performance of air-conditioning systems with two air supply modes for a simplified office room was studied by numerical simulation and physical experiment. An experimental investigation was developed in an environmental chamber to validate the simulation model. Numerical investigation was carried out subsequently for an office setting by the validated CFD model. The indoor thermal environment, human thermal comfort and energy utilization efficiency of two air supply modes were analyzed and compared in this study. The results showed that under both air supply modes, thermal stratification occurred in the model room, and the air flow velocity in the occupied zone was low. In addition, the results indicated that under 21°C supply temperature, the air-conditioning system with bottom-supply mode provided better indoor thermal comfort of the occupied zone, but the energy consumption was higher than the side-supply mode.

Suggested Citation

  • Zheng, Chenxiao & You, Shijun & Zhang, Huan & Zheng, Wandong & Zheng, Xuejing & Ye, Tianzheng & Liu, Zeqin, 2018. "Comparison of air-conditioning systems with bottom-supply and side-supply modes in a typical office room," Applied Energy, Elsevier, vol. 227(C), pages 304-311.
    • Handle: RePEc:eee:appene:v:227:y:2018:i:c:p:304-311
    DOI: 10.1016/j.apenergy.2017.07.078
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    Cited by:

    1. Zhang, Sheng & Cheng, Yong & Oladokun, Majeed Olaide & Huan, Chao & Lin, Zhang, 2019. "Heat removal efficiency of stratum ventilation for air-side modulation," Applied Energy, Elsevier, vol. 238(C), pages 1237-1249.
    2. Zhang, Sheng & Lin, Zhang & Ai, Zhengtao & Huan, Chao & Cheng, Yong & Wang, Fenghao, 2019. "Multi-criteria performance optimization for operation of stratum ventilation under heating mode," Applied Energy, Elsevier, vol. 239(C), pages 969-980.
    3. Yat Huang Yau & Umair Ahmed Rajput & Altaf Hussain Rajpar & Natalia Lastovets, 2022. "Effects of Air Supply Terminal Devices on the Performance of Variable Refrigerant Flow Integrated Stratum Ventilation System: An Experimental Study," Energies, MDPI, vol. 15(4), pages 1-23, February.
    4. Guillermo Efren Ovando-Chacon & Sandy Luz Ovando-Chacon & Abelardo Rodríguez-León & Mario Díaz-González, 2023. "Numerical Study of Indoor Air Quality in a University Professor’s Office," Sustainability, MDPI, vol. 15(5), pages 1-19, February.
    5. 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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