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Experimental investigation on indoor environment and energy performance of convective terminals

Author

Listed:
  • Yang, Zixu
  • Sun, Hongli
  • Wang, Baolong
  • Xiao, Hansong
  • Dong, Xian
  • Shi, Wenxing
  • Lin, Borong

Abstract

The indoor environment and energy performances of convective terminals have been widely studied under the strong heating demands in cold regions. As different operative conditions affect the performances of heating devices, investigating these factors under different conditions can help improve the performances. In this study, the thermal performances of fan coil units (FCUs) and room air conditioners (RACs) were studied using comparative experiments, based on overall indoor environmental factors, local discomfort indices, energy performances, terminal characteristics, and integrated analysis. The results for the indoor environment were classified into different types, with the aim of analyzing approaches to obtaining a comfortable environment. The proper operating conditions reduce the percentages of dissatisfied caused by vertical temperature, floor temperature, and radiant asymmetry by 30.0%, 9.7%, and 28.8% for FCUs, respectively, and by 45.8%, 22.2%, and 0.2% for RACs, respectively. Long-term operation, high airspeed, downward air supply, and low set-point temperature were recommended to form a comfortable environment. The energy efficiency is improved by 9.6% and 2.7% with a low set-point temperature and downward supply air. The factors influencing thermal comfort and energy consumption are systematically analyzed, and the differences between continuous and intermittent convective terminals are compared.

Suggested Citation

  • Yang, Zixu & Sun, Hongli & Wang, Baolong & Xiao, Hansong & Dong, Xian & Shi, Wenxing & Lin, Borong, 2022. "Experimental investigation on indoor environment and energy performance of convective terminals," Energy, Elsevier, vol. 251(C).
    • Handle: RePEc:eee:energy:v:251:y:2022:i:c:s0360544222008325
    DOI: 10.1016/j.energy.2022.123929
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    References listed on IDEAS

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    1. Sun, Hongli & Duan, Mengfan & Yang, Zixu & Ding, Pei & Wu, Yifan & Lin, Borong, 2023. "Evaluation of the intermittent performance of heating terminals based on exergy analysis: Discriminate the impacts of heat and electricity input," Applied Energy, Elsevier, vol. 346(C).

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