Investigation and Improvement the Thermal Comfort of the Air Conditioning mosque at Hot - Dry Climate in Baghdad

Abstract

This study is concerned with investigating and improving the thermal comfort conditions of the worshipers in Omar bin Abdul Aziz Mosque in Iraq - Baghdad, which is characterized by a hot- dry climate in the summer. The study was conducted at the time of noon prayer on Friday (Friday prayer) on July 20 at 1 pm, at external temperature 50c and relative humidity 20%. Numerical methods (CFD) were used for simulation by Ansys -Fluent v. 18 and divided the domain at 4 million mesh element. Thermal comfort was assessed by finding the values of the predicted mean vote (pmv) and predicted the percentage of dissatisfied (ppd) it depended by ASHRAE standard -55. The strategy of re-distribution of the adaptive devices was used to obtain the best level of thermal comfort. The third case was the best in terms of thermal comfort. The temperature was 0.4 C lower than the original state. The improvement rate of PMV was 4.43%, ppd 5.96% lower than the original state. Also, it is found that the best model of the flow is turbulent K-e (RNG) for the studied case.