Effect of inlet/outlet on thermal performance of naturally ventilated building
Maher D. Hana A. Arjmand J.T. Issakhov A. Sammouda H. Sheremet M. Sharma S.
1 December 2021Oxford University Press
International Journal of Low-Carbon Technologies
2021#16Issue 41348 - 1362 pp.
Ventilation is a way of improving the air quality of rooms by circulation. The position of the inlet and outlet greatly influences the thermal comfort. This attempt proposes to analyse the effect of the position of window openings for a room building with natural ventilation and the air flow and temperature distribution numerically using a commercial computational fluid dynamics (CFD) code. This proposed study consists of (i) approving the numerical model against experimental data gathered in an environment similar to the one used in simulations and (ii) applying the CFD model to explore the results of four varying configurations of ventilator on the natural ventilation system and thermal comfort. For the varying arrangements, the wind speed is 0.2 m⋅s-1 perpendicular to the openings for a wind, (iii) evaluating the comfort level utilizing the Air Diffusion Performance Index (ADPI) on the basis of ASHRAE 55-210 criteria. The obtained results show that the positions of outlet and inlet openings highly affect the performance in the thermal comfort while they have a trivial effect on the occupied zone mean velocity. The computational results showed that the two cases (a) and (b) present results very close to each other with a slight difference at the center of the chamber. Most of the calculated values (effective draft temperature, EDT) are between (-1.7 and 1.1). Then ADPI is over 70% for case (a) and over 75% for case (b), so all points they are located in the comfort zone. The results affirmed also that configuration with inlet openings set at 1.022 m above ground and an outlet opening set at 0.52 m brings about the most applicable solution ventilation efficiency and give the best EDT that fulfills the criteria of ASHRAE 55-210 with an ADPI of ~90%.
Building , Comfort , Computational fluid dynamic , Ventilation
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Higher Institute of Agricultural Sciences of Chott Mariem, University of Sousse, BP No 47, Sousse, 4042, Tunisia
Civil Department, National Engineering School of Tunis, University of Tunis El Manar, Tunis, 1002, Tunisia
Laboratory of Energy and Materials (LabEM) (LR11ES34), High School of Sciences and Technology of Hammam Sousse, Sousse University, BP 4011, Hammam Sousse, Tunisia
Faculty of Architecture and Urban Planning, University of Art, Tehran, 1136813518, Iran
Faculty of Mechanics and Mathematics, Department of Mathematical and Computer Modelling, Al-Farabi Kazakh National University, Almaty, 050000 - 050063, Kazakhstan
Laboratory on Convective Heat and Mass Transfer, Department of Theoretical Mechanics, Tomsk State University, Tomsk, 634050, Russian Federation
Department of Mechanical Engineering, IK Gujral Punjab Technical University, Main Campus, Kapurthala, 144603, India
Higher Institute of Agricultural Sciences of Chott Mariem
Civil Department
Laboratory of Energy and Materials (LabEM) (LR11ES34)
Faculty of Architecture and Urban Planning
Faculty of Mechanics and Mathematics
Laboratory on Convective Heat and Mass Transfer
Department of Mechanical Engineering
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