AIR TEMPERATURE DISTRBUSION AND CONTAMMINATE CONCENTRATION IN LABORATORY UNDER IRAQI CLIMATE

Alaa Abbas Mahdi, Dr.; Hassan Jasim, Zahraa

	AIR TEMPERATURE DISTRBUSION AND CONTAMMINATE CONCENTRATION IN LABORATORY UNDER IRAQI CLIMATE
Iraqi journal of mechanical and material engineering
Article 1, Volume 17, Issue 2, 2017, Pages 309-326
Authors
Dr. Alaa Abbas Mahdi; Zahraa Hassan Jasim
Abstract
Ventilation is the main performance requirement in laboratory design as it has to guarantee a safe and comfortable indoor environment. standards and guidelines on laboratory ventilation often impose high ventilation rates, increasing the energy need for ventilation. This research focuses on the steady-state distribution of temperature and contaminate concentrations in a real environment which was a function of several factors such as the position of air exhausts. Here several different exhaust locations were investigated to determine the optimum exhaust positions. In this study, CO2 is used as an indicator of the concentration of pollutants inside tested room. Room concentration patterns for a laboratory were simulated with computational fluid dynamics (CFD) simulations by using (FLUINT6.3.26) and (GAMBIT V.2.4.6) computer programs for various exhaust locations. The computational results were validated with design data due to Iraqi cooling code (setup temperature and temperature difference from head to foot level). The numerical results showed that the exhaust grills located near the ceiling resulted in lower pollutant concentrations than the corresponding exhausts near the floor.
Keywords
Mixing ventilation; Indoor air quality; air distribution performance index; numerical model; Iraqi cooling code

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