Investigation And Improvement The Thermal Comfort Of The Air Conditioning mosque At Hot - Dry Climate In Baghdad

International Conference on Materials Engineering and Science

Ali Najeeb Alashaab, Ahmed^1 ; Alamery, Mohammed Saeed^1

Mechanical Engineering Department, College of Engineering, University of Anbar, Iraq^1

关键词: Adaptive devices;    Comfort conditions;    External temperature;    Hot dry climates;    Mesh elements;    Original state;    Predicted mean vote;    Re-distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/454/1/012154/pdf
DOI  :  10.1088/1757-899X/454/1/012154

来源: IOP

【 摘 要 】

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.