Optimization of air-curtain sealing efficiency with respect to heat transfer in naturally ventilated buildings

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Abstract

This study presents results of coupled 3D steady Reynolds-averaged Navier-Stokes (RANS) Computational Fluid Dynamics (CFD) simulations of an isolated naturally-ventilated building with the application of an air curtain to prevent heat transfer across a doorway. The considered parameters include air curtain velocity, width and angle, indoor and outdoor tempera-tures, and wind flow. The results showed that higher temperatures inside the studied building were provided for: (1) higher jet velocities Vac for a jet angle a = 15deg, when jet width wjet is constant; (2) larger jet width wjet, when jet angle a and jet momentum Mac' are constant; (3) jet angle a = 0deg, when jet velocity Vac and jet width wjet are constant. The results also showed that for an air curtain with a = 0deg the air jet slightly bended to the outside that is possibly caused by stagnation-zone flow in front of the building.
Original languageEnglish
Title of host publicationThe 9th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC) and the 3rd International Conference on Building Energy and Environment (COBEE), 12-15 July 2015 Tianjin, China
EditorsY. Sun, J. Pei, X Zhao
PublisherTianjin, China
Number of pages8
Publication statusPublished - Jun 2015
Event9th International Symposium on Heating, Ventilation, and Air Conditioning (ISHVAC 2015) / 3rd International Conference on Building Energy and Environment (COBEE 2015), July 12-15, 2015, Tianjin, China - Tianjin, China
Duration: 12 Jul 201515 Jul 2015

Conference

Conference9th International Symposium on Heating, Ventilation, and Air Conditioning (ISHVAC 2015) / 3rd International Conference on Building Energy and Environment (COBEE 2015), July 12-15, 2015, Tianjin, China
Abbreviated titleISHVAC-COBEE 2015
CountryChina
CityTianjin
Period12/07/1515/07/15

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  • Cite this

    Khayrullina, A., van Hooff, T., Blocken, B. J. E., & van Heijst, G. J. F. (2015). Optimization of air-curtain sealing efficiency with respect to heat transfer in naturally ventilated buildings. In Y. Sun, J. Pei, & X. Zhao (Eds.), The 9th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC) and the 3rd International Conference on Building Energy and Environment (COBEE), 12-15 July 2015 Tianjin, China Tianjin, China.