Determining velocity, temperature and occupancy comfort within a three-dimensional room

مرکز و کتابخانه مطالعات اسلامی به زبان های اروپایی

منو

" Determining velocity, temperature and occupancy comfort within a three-dimensional room "
A. S. H. Al-Hamed

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1112689
Doc. No	:	TLpq238181801
Main Entry	:	A. S. H. Al-Hamed
Title & Author	:	Determining velocity, temperature and occupancy comfort within a three-dimensional room\ A. S. H. Al-Hamed
College	:	King Fahd University of Petroleum and Minerals (Saudi Arabia)
Date	:	1990
student score	:	1990
Degree	:	M.S.
Page No	:	409
Abstract	:	A computer program for simulating 3-D room ventilation problems is described and employed to predict the mean air temperatures and velocities for a number of realistic supply air inlet and outlet locations. The program, TEACH-3D, solves the steady state conservation equations of mass, momentum and thermal energy using a finite difference scheme, based on the control volume approach. Due to the nature of turbulence, encountered in this research, the k-usd\varepsilonusd turbulence model was selected to transform the open form of the governing conservation equations to closed form. The SIMPLE scheme was employed in the numerical code to handle the velocity-pressure link. The flow field predicted by the numerical code is supported by experimental measurements done by others. To decide on the effect the geometrical locations of the inlet and outlet has on comfort, the computed results are translated into PMV indices over the entire occupied zone of the room. The PPD is also employed to render judgement on the human thermal comfort response, such that if the PPD is less than 20%, then comfort is claimed to be attained. In addition to varying the inlet and outlet locations, the supply air temperature and velocity has also been varied for a particular arrangement in an attempt to achieve thermal comfort. Out of the four different arrangements of supply and exhaust ports investigated here, the one having the inlet on the floor near the West side wall and the outlet on the ceiling near the East side wall satisfied occupancy thermal comfort. While the arrangement least achieving thermal comfort of the occupants is the one having the inlet on the ceiling near the West wall and the outlet on the East wall adjacent to the floor.
Subject	:	Applied sciences
	:	Civil engineering
	:	Mechanical engineering