The Influence on the Limit Flow Ratio Caused by the Change of the Area of the Exhaust Hood Face in the Design of Push–Pull Ventilation

  • Shulin ZhouEmail author
  • Bin Yang
  • Huijun Zhang
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 576)


This study is to investigate whether the change of the exhaust hood area has an effect on the limiting flow ratio KL in an push–pull ventilation device, especially when the face area of the supply hood is larger than the exhaust hood. This research is based on experiment. Set up a push–pull ventilation device, change the area of the exhaust hood face under the condition of maintaining other factors unchanged. Determine the minimum exhaust volume which completely drains the given air supply without overflow by the tracer method, and the KL could be deduced. The experimental results show that under the above experimental conditions, the change of the exhaust hood area will cause a change on the limiting flow ratio KL, and the larger the gap between the supply and exhaust hood area, the greater the KL value will be. Change the distance between the push and pull hood face, repeat the above experiments, it is verified that the conclusions above are still valid when the distance changes.


Push–pull Ventilation Area of the exhaust hood face Exhaust volume rate Flow ratio method 



This study was supported by the National Key R&D Program of China, Grant No. 2016YFC0801700.


  1. 1.
    American Conference of Governmental Industrial Hygienists (2010) Industrial ventilation a manual of recommended practice. ACGIH, CincinnatiGoogle Scholar
  2. 2.
    Malin BS (1945) Practical pointers on industrial exhaust system. Heat Vent 42:75–82Google Scholar
  3. 3.
    Tuyosi Y, Katsurou O, Kumasi N (2013) The standard design and maintenance management of local ventilation push- pull ventilator and air cleaner. Japan Ind Safety Health Assoc, TokyoGoogle Scholar
  4. 4.
    Guo P, Fu H, Zhao Y et al (2008) Development and present status of push-pull ventilation technology. J Heating Vent Air Conditioning 38(4):57–61Google Scholar
  5. 5.
    Tarou H (1986) Factory ventilation. China Architect Building Press, BeijingGoogle Scholar
  6. 6.
    Zheng W, Wang Y, Tang Y (2011) Status of researches and applications of push-pull ventilation technology. HV&AC 47(4):1–5Google Scholar
  7. 7.
    Damin Z, Tsuji K, F Isamu (1987) Simulations of the push-pull flow. Air Conditioning Pap Collect Soc Health Eng 33:33Google Scholar
  8. 8.
    Tarou H, Howell RH, Makoto S et al (1988) Industrial ventilation and air conditioning. Beijing Industrial University Press, BeijingGoogle Scholar
  9. 9.
    Sakurai H, Kanehara K, Fukuhara I et al (2000) Proposal of a simplified equation for push-pull type local ventilation systems. Sci Labour 76(6):261–268Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.China Academy of Safety Science & TechnologyBeijingChina

Personalised recommendations