Numerical Simulation of Air Temperature and Velocity in a Naturally Ventilated Office

  • S. Shodiya Department of Mechanical Engineering, Faculty of Engineering, University of Maiduguri, Maiduguri, Borno State, Nigeria
  • M. B. Oumarou Department of Mechanical Engineering, Faculty of Engineering, University of Maiduguri, Maiduguri, Borno State, Nigeria
  • G. M. Ngala Department of Mechanical Engineering, Faculty of Engineering, University of Maiduguri, Maiduguri, Borno State, Nigeria
  • A. B. Mohammed Department of Mechanical Engineering, Faculty of Engineering, University of Maiduguri, Maiduguri, Borno State, Nigeria

Abstract

This paper presents a numerical simulation of air velocity and air temperature distribution in an office room of Computer Engineering Department of University of Maiduguri which is naturally ventilated. The office room under investigation with the dimension 5 m × 5 m × 4 m has a door in the East direction, and two windows, one in the East direction and the other in the South direction. For cost effectiveness, numerical solutions of steady-state airflow and heat transfer were done using a complete two-dimensional model. The results showed that the windows and the door could not undertake indoor heat load that can make the occupants to be thermally comfortable. In activity area where people sit and stand, the air velocity is moderate, this is about 0.98 m/s on the average. In addition, the temperature in this area is relatively high of about 302 K (29 °C) on the average. Based on the American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE) standard for comfort environment in summer (air temperature: 293 – 299 K (20 – 26 °C); air velocity: 0.5 – 0.8 m/s), the natural ventilation for the office room cannot give a thermal comfort for the inhabitant of the room. However, a window, if installed opposite the door could improve the ventilation of the office.

Published
Apr 1, 2017
How to Cite
SHODIYA, S. et al. Numerical Simulation of Air Temperature and Velocity in a Naturally Ventilated Office. Arid Zone Journal of Engineering, Technology and Environment, [S.l.], v. 13, n. 2, p. 307-314, apr. 2017. ISSN 2545-5818. Available at: <http://azojete.com.ng/index.php/azojete/article/view/15>. Date accessed: 23 oct. 2017.
Section
Articles