Experimental analysis on wall jet night ventilation system

Wenhui Ji, Per Kvols Heiselberg, Qing Luo, Houhua Wang, Zili Zhang

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

Resumé

This paper presents an experimental analysis on night ventilation with wall-attached jet system. In this night ventilation scheme, wall jet is generated by the induced cool outdoor air flowing downward over the inner surface of concrete wall. Full-scale experiments have been performed to study the cooling effect of night ventilation system in Chongqing, China. The velocity gradient of the air curtain in the near wall region is measured. Obvious decline of inner wall surface temperature and room air temperature is observed at the moment when ventilation starts. The wall surface cooling efficiency index and room air distribution efficiency index are defined and calculated. The experimental results reveal that high momentum of wall jet contributes to the cooling effect of walls and room air.
OriginalsprogEngelsk
TitelPROCEEDINGS — Roomvent & Ventilation 2018 : Excellent Indoor Climate and High Performing Ventilation
RedaktørerRisto Kosonen, Mervi Ahola, Jarkko Narvanne
Udgivelses stedHelsinki
ForlagSIY Indoor Air Information Oy
Publikationsdato2018
Sider433-438
ISBN (Elektronisk)978-952-5236-48-4
StatusUdgivet - 2018
BegivenhedRoomvent 2018: International Conference on Air Distribution in Rooms - Aalto University, ,Finland, Espoo, Finland
Varighed: 2 jun. 20185 jun. 2018
https://roomventilation2018.org/

Konference

KonferenceRoomvent 2018
LokationAalto University, ,Finland
LandFinland
ByEspoo
Periode02/06/201805/06/2018
Internetadresse

Fingerprint

Ventilation
Air
Cooling
Air curtains
Momentum
Concretes
Temperature
Experiments

Bibliografisk note

Track 3 – Energy and Ventilation: Energy Performance of Buildings (EPB1)

Emneord

  • Night ventilation
  • Air jet
  • Cooling efficiency

Citer dette

Ji, W., Heiselberg, P. K., Luo, Q., Wang, H., & Zhang, Z. (2018). Experimental analysis on wall jet night ventilation system. I R. Kosonen, M. Ahola, & J. Narvanne (red.), PROCEEDINGS — Roomvent & Ventilation 2018: Excellent Indoor Climate and High Performing Ventilation (s. 433-438). Helsinki: SIY Indoor Air Information Oy.
Ji, Wenhui ; Heiselberg, Per Kvols ; Luo, Qing ; Wang, Houhua ; Zhang, Zili. / Experimental analysis on wall jet night ventilation system. PROCEEDINGS — Roomvent & Ventilation 2018: Excellent Indoor Climate and High Performing Ventilation. red. / Risto Kosonen ; Mervi Ahola ; Jarkko Narvanne. Helsinki : SIY Indoor Air Information Oy, 2018. s. 433-438
@inproceedings{f0ef8563c9d34a23ad3565e84beb58ff,
title = "Experimental analysis on wall jet night ventilation system",
abstract = "This paper presents an experimental analysis on night ventilation with wall-attached jet system. In this night ventilation scheme, wall jet is generated by the induced cool outdoor air flowing downward over the inner surface of concrete wall. Full-scale experiments have been performed to study the cooling effect of night ventilation system in Chongqing, China. The velocity gradient of the air curtain in the near wall region is measured. Obvious decline of inner wall surface temperature and room air temperature is observed at the moment when ventilation starts. The wall surface cooling efficiency index and room air distribution efficiency index are defined and calculated. The experimental results reveal that high momentum of wall jet contributes to the cooling effect of walls and room air.",
keywords = "Night ventilation, Air jet, Cooling efficiency, Night ventilation, Air jet, Cooling efficiency",
author = "Wenhui Ji and Heiselberg, {Per Kvols} and Qing Luo and Houhua Wang and Zili Zhang",
note = "Track 3 – Energy and Ventilation: Energy Performance of Buildings (EPB1)",
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Ji, W, Heiselberg, PK, Luo, Q, Wang, H & Zhang, Z 2018, Experimental analysis on wall jet night ventilation system. i R Kosonen, M Ahola & J Narvanne (red), PROCEEDINGS — Roomvent & Ventilation 2018: Excellent Indoor Climate and High Performing Ventilation. SIY Indoor Air Information Oy, Helsinki, s. 433-438, Espoo, Finland, 02/06/2018.

Experimental analysis on wall jet night ventilation system. / Ji, Wenhui; Heiselberg, Per Kvols; Luo, Qing; Wang, Houhua; Zhang, Zili.

PROCEEDINGS — Roomvent & Ventilation 2018: Excellent Indoor Climate and High Performing Ventilation. red. / Risto Kosonen; Mervi Ahola; Jarkko Narvanne. Helsinki : SIY Indoor Air Information Oy, 2018. s. 433-438.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

TY - GEN

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AU - Ji, Wenhui

AU - Heiselberg, Per Kvols

AU - Luo, Qing

AU - Wang, Houhua

AU - Zhang, Zili

N1 - Track 3 – Energy and Ventilation: Energy Performance of Buildings (EPB1)

PY - 2018

Y1 - 2018

N2 - This paper presents an experimental analysis on night ventilation with wall-attached jet system. In this night ventilation scheme, wall jet is generated by the induced cool outdoor air flowing downward over the inner surface of concrete wall. Full-scale experiments have been performed to study the cooling effect of night ventilation system in Chongqing, China. The velocity gradient of the air curtain in the near wall region is measured. Obvious decline of inner wall surface temperature and room air temperature is observed at the moment when ventilation starts. The wall surface cooling efficiency index and room air distribution efficiency index are defined and calculated. The experimental results reveal that high momentum of wall jet contributes to the cooling effect of walls and room air.

AB - This paper presents an experimental analysis on night ventilation with wall-attached jet system. In this night ventilation scheme, wall jet is generated by the induced cool outdoor air flowing downward over the inner surface of concrete wall. Full-scale experiments have been performed to study the cooling effect of night ventilation system in Chongqing, China. The velocity gradient of the air curtain in the near wall region is measured. Obvious decline of inner wall surface temperature and room air temperature is observed at the moment when ventilation starts. The wall surface cooling efficiency index and room air distribution efficiency index are defined and calculated. The experimental results reveal that high momentum of wall jet contributes to the cooling effect of walls and room air.

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KW - Air jet

KW - Cooling efficiency

KW - Night ventilation

KW - Air jet

KW - Cooling efficiency

UR - http://www.scanvac.info/roomvent-2018.html#

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EP - 438

BT - PROCEEDINGS — Roomvent & Ventilation 2018

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PB - SIY Indoor Air Information Oy

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Ji W, Heiselberg PK, Luo Q, Wang H, Zhang Z. Experimental analysis on wall jet night ventilation system. I Kosonen R, Ahola M, Narvanne J, red., PROCEEDINGS — Roomvent & Ventilation 2018: Excellent Indoor Climate and High Performing Ventilation. Helsinki: SIY Indoor Air Information Oy. 2018. s. 433-438