TY - GEN
T1 - Efficiency of a heated air curtain under cross-jet temperature gradients
AU - Ruiz, Claudio Alanis
AU - van Hooff, Twan
AU - Blocken, Bert
AU - van Heijst, Gert Jan
N1 - Publisher Copyright:
© International Building Performance Simulation Association, 2022
PY - 2021/11/29
Y1 - 2021/11/29
N2 - The infiltration of unconditioned outdoor air to controlled indoor environments can have negative impacts on the energy performance and indoor environmental quality of buildings. Air curtains can be used to reduce infiltration through entrance doors where transit is frequent. The stability and performance of air curtains strongly depends on the combination of jet and environmental forces that act on them, including forces due to cross-jet density gradients and injection of buoyancy in the jet. This study addresses the performance of a heated air-curtain system by means of validated computational fluid dynamics (CFD) simulations. Two performance indicators are considered: (1) separation efficiency (related to mass transport), and (2) thermal efficiency (related to heat transport). The results indicate that based on the performance indicators, the use of a heated air curtain is not favorable over the use of an isothermal air curtain.
AB - The infiltration of unconditioned outdoor air to controlled indoor environments can have negative impacts on the energy performance and indoor environmental quality of buildings. Air curtains can be used to reduce infiltration through entrance doors where transit is frequent. The stability and performance of air curtains strongly depends on the combination of jet and environmental forces that act on them, including forces due to cross-jet density gradients and injection of buoyancy in the jet. This study addresses the performance of a heated air-curtain system by means of validated computational fluid dynamics (CFD) simulations. Two performance indicators are considered: (1) separation efficiency (related to mass transport), and (2) thermal efficiency (related to heat transport). The results indicate that based on the performance indicators, the use of a heated air curtain is not favorable over the use of an isothermal air curtain.
UR - http://www.scopus.com/inward/record.url?scp=85151531534&partnerID=8YFLogxK
U2 - 10.26868/25222708.2021.30770
DO - 10.26868/25222708.2021.30770
M3 - Conference contribution
AN - SCOPUS:85151531534
T3 - Building Simulation Conference Proceedings
SP - 511
EP - 517
BT - Proceedings of Building Simulation 2021
A2 - Saelens, Dirk
A2 - Laverge, Jelle
A2 - Boydens, Wim
A2 - Helsen, Lieve
PB - IBPSA
T2 - 17th IBPSA Conference on Building Simulation 2021
Y2 - 1 September 2021 through 3 September 2021
ER -