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Heat and hazardous contaminant transports in ventilated high-rise industrial halls

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Abstract

Performances and efficiencies of displacement ventilation (DV) and partial ventilation (PV) for industrial halls of different configurations as well as the heat and mass transports within the industrial halls were numerically investigated. Three levels of Rayleigh number (5.8×1010, 1.0×1012 and 2.1×1012) and two values of source contaminant flux (5 mg/s and 50 mg/s) were considered. The inlet Reynolds numbers were 2×104, 5×104, 1.5×105 and 4.5×105 for DV and 5×105, 1×106, 2×106 and 4×106 for PV, respectively. From the results, it is concluded that the above parameters have very complex impacts on the conjugated heat and mass transports. From points of view of acceptable indoor air quality and ventilation efficiency, PV at Re=1×106 with side-located sources and 65% of the supply air extracted through floor level outlets is the best choice when Ra=5.8×1010. However, DVs at Re=5×104 and Re=1.5×105 with center-located sources and floor-mounted air suppliers are the best choices for Ra=1.0×1012 and Ra=2.1×1012, respectively. When source contaminant flux reaches 50 mg/s, local extraction as a supplement of general ventilation is recommended. The results can be a first approximation to 3D numerical investigation and preliminary ventilation system design guidelines for high-rise industrial halls.

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Authors and Affiliations

  1. School of Energy Science and Engineering, Central South University, Changsha, 410083, China

    Feng-feng Wang  (王沨枫), Zhi-qiang Liu  (刘志强), Han-qing Wang  (王汉青), Wen-wu Tang  (唐文武) & Guang-xiao Kou  (寇广孝)

  2. Faculty of Civil Engineering, RWTH Aachen University, Aachen, 52074, Germany

    Feng-feng Wang  (王沨枫) & Christoph van Treeck

  3. School of Civil Engineering, Hunan University of Technology, Zhuzhou, 412008, China

    Han-qing Wang  (王汉青), Wen-wu Tang  (唐文武) & Guang-xiao Kou  (寇广孝)

Authors
  1. Feng-feng Wang  (王沨枫)
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  2. Zhi-qiang Liu  (刘志强)
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  3. Christoph van Treeck
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  4. Han-qing Wang  (王汉青)
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  5. Wen-wu Tang  (唐文武)
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  6. Guang-xiao Kou  (寇广孝)
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Corresponding author

Correspondence to Han-qing Wang  (王汉青).

Additional information

Foundation item: Project(2011BAJ03B07) supported by National Twelve Five-year Science and Technology Support Program of China; Project supported by the China Scholarship Council; Project(51276057, 51376198) supported by the National Natural Science Foundation of China; Project(CX2014B064) supported by Hunan Provincial Innovation Foundation for Postgraduate, China

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Wang, Ff., Liu, Zq., van Treeck, C. et al. Heat and hazardous contaminant transports in ventilated high-rise industrial halls. J. Cent. South Univ. 22, 2106–2118 (2015). https://doi.org/10.1007/s11771-015-2735-z

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  • DOI: https://doi.org/10.1007/s11771-015-2735-z

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