IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v187y2019ics0360544219316524.html
   My bibliography  Save this article

Effect of velocity non-uniformity of supply air on the mixing characteristics of push-pull ventilation systems

Author

Listed:
  • Wang, Yi
  • Quan, Mengfan
  • Zhou, Yu

Abstract

The aim of this paper is to investigate the effect of the supply air velocity profile and direction on the mixing characteristics of push-pull ventilation systems. An experiment was set up to validate the numerical simulation. Then, numerical simulations were performed to investigate five velocity profile models (uniform, parabolic, linear-down, linear-up and side) and four flow direction models. Mixing fraction ε and mixing rate‾ε were proposed as evaluating indexes of the mixing amount of ambient air. The simulation results indicated that the mixing fraction distribution can visually show the mixing characteristics of the ambient air under different air supply conditions. Secondly, when there is airflow escape at the pull hood, the effect of the supply air velocity profile and direction on the mixing amount should be taken seriously. On the other hand, when there is no airflow escape, the mixing amount along the flow path increases linearly, and the effect of the velocity profile and direction on the mixing amount is small. Finally, the mixing amount along the flow path has a minimum value at a certain flow ratio. The results of the present study have certain guiding significance for the design of push-pull ventilation systems.

Suggested Citation

  • Wang, Yi & Quan, Mengfan & Zhou, Yu, 2019. "Effect of velocity non-uniformity of supply air on the mixing characteristics of push-pull ventilation systems," Energy, Elsevier, vol. 187(C).
    • Handle: RePEc:eee:energy:v:187:y:2019:i:c:s0360544219316524
    DOI: 10.1016/j.energy.2019.115962
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544219316524
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2019.115962?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Jianwu Chen & Longzhe Jin & Bin Yang & Zhenfang Chen & Guoliang Zhang, 2022. "Influence of the Internal Structure Type of a Large-Area Lower Exhaust Workbench on Its Surface Air Distribution," IJERPH, MDPI, vol. 19(18), pages 1-14, September.
    2. Jianwu Chen, 2022. "Changing Patterns of the Flow Ratio with the Distance of Exhaust and Supply Hood in a Parallel Square Push-Pull Ventilation," IJERPH, MDPI, vol. 19(5), pages 1-10, March.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:187:y:2019:i:c:s0360544219316524. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.