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The International Symposium on Heating, Ventilation and Air Conditioning

ISHVAC 2019: Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019) pp 71–78Cite as

Passive Thermal Protections of Smoke Exhaust Fans for a High-Temperature Heat Source

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Part of the book series: Environmental Science and Engineering ((ENVENG))

Abstract

Smoke exhaust fans (SEFs) are commonly used to directly remove high-temperature gas exhausted from fire accidents, or industrial applications such as gas turbines and product manufacturing. Most available SEFs used in a confined space can be working properly under specific temperature range for a short period of time. Therefore, thermal protection for the fans is a vital issue to prevent SEFs from failing and causing damages or disasters. In this paper, a linearly five-SEF-array is used to extract exhaust gas from a moving impinging jet at approximately 700 K. Three passive (as opposed to active spraying) measures, i.e., installing a dam board for a fan, changing the angle of inclination of the fans and reducing the running number of fans are studied using the computational fluid dynamics (CFD) method. Three indicators, i.e., gas temperature at the inlet of the fan (Ti), the area of high-temperature zone (Ah) and total space ventilation efficiency of the fans, are assessed by employing at least one of the passive measures. The results show that, first, on the one hand, passive thermal protections are effective tools in decreasing Ti, especially for the fan that is closest to the heat source. On the other hand, Ah will be enlarged with the passive protections, since the exhaust gas is not directly being extracted. Second, changing the angle of inclination of the fans can decrease the temperature of the smoke that enters the SEFs. Third, the smoke exhaust efficiency can also be significantly lowered by reducing the running number of fans. Last but not least, passive protection control strategy should be up to the location of heat source.

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Acknowledgements

This research has been supported by the National Natural Science Foundation of China under Grant No. 51878463.

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Authors and Affiliations

  1. School of Mechanical Engineering, Tongji University, 201804, Shanghai, China

    Yixiang Huang, Chengqiang Zhi, Qianru Zhang, Wei Ye & Xu Zhang

  2. Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education, Tongji University, 200092, Shanghai, China

    Wei Ye

Authors
  1. Yixiang Huang
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  2. Chengqiang Zhi
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  3. Qianru Zhang
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  4. Wei Ye
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  5. Xu Zhang
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Corresponding authors

Correspondence to Wei Ye or Xu Zhang .

Editor information

Editors and Affiliations

  1. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Zhaojun Wang

  2. Department of Building Science, School of Architecture, Tsinghua University, Beijing, China

    Yingxin Zhu

  3. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Fang Wang

  4. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Peng Wang

  5. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Chao Shen

  6. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Jing Liu

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Cite this paper

Huang, Y., Zhi, C., Zhang, Q., Ye, W., Zhang, X. (2020). Passive Thermal Protections of Smoke Exhaust Fans for a High-Temperature Heat Source. In: Wang, Z., Zhu, Y., Wang, F., Wang, P., Shen, C., Liu, J. (eds) Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019). ISHVAC 2019. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-9524-6_8

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