Fatemeh Behbahani * - Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Mahdi Hamzei - Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Zahra Mehrdoost - Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Mohammad Moghiman - Department of Mechanical Engineering, Ferdowsi University, Mashhad, Iran

The study of temperature and smoke movement in the car park space of the commercial complex was done by Fire Dynamic Simulator code (FDS) with disparate fire accidents. Specification fires of closed car parks were obtained in different fan system conditions. Three scenarios were considered for the ventilation system, which includes the following: the first scenario with no ventilation, the second scenario using a supply fan and an exhaust fan, and the third scenario using a jet fan. Temperature and smoke concentration of a stairwell under various conditions were contrasted. The values ​​were obtained at a height of ۱.۶ m. Temperature and smoke movement affect the peak of exit people. The results showed that in the first state, temperature and smoke concentration reached ۸۰°C and ۰.۰۰۳ mole/mole in the ۱۲۰۰s after the fire, respectively. In the second state, smoke concentration reached ۰.۰۰۰۲ mole/mole in the ۱۲۰۰s, which was ۹۳% better than the first scenario. The temperature also decreased to ۵۱.۱۱ °C in the ۱۲۰۰s. The temperature improved by ۳۶.۱۹% ​​compared to the first state. In the third state, after ۱۲۰۰ seconds, the temperature decreased to ۴۴.۷۲°C. In the third scenario, the smoke concentration was ۰.۰۰۰۰۶ mole/mole, which improved by ۵۷.۵% compared to the first scenario.The study of temperature and smoke movement in the car park space of the commercial complex was done by Fire Dynamic Simulator code (FDS) with disparate fire accidents. Specification fires of closed car parks were obtained in different fan system conditions. Three scenarios were considered for the ventilation system, which includes the following: the first scenario with no ventilation, the second scenario using a supply fan and an exhaust fan, and the third scenario using a jet fan. Temperature and smoke concentration of a stairwell under various conditions were contrasted. The values ​​were obtained at a height of ۱.۶ m. Temperature and smoke movement affect the peak of exit people. The results showed that in the first state, temperature and smoke concentration reached ۸۰°C and ۰.۰۰۳ mole/mole in the ۱۲۰۰s after the fire, respectively. In the second state, smoke concentration reached ۰.۰۰۰۲ mole/mole in the ۱۲۰۰s, which was ۹۳% better than the first scenario. The temperature also decreased to ۵۱.۱۱ °C in the ۱۲۰۰s. The temperature improved by ۳۶.۱۹% ​​compared to the first state. In the third state, after ۱۲۰۰ seconds, the temperature decreased to ۴۴.۷۲°C. In the third scenario, the smoke concentration was ۰.۰۰۰۰۶ mole/mole, which improved by ۵۷.۵% compared to the first scenario.

FDS, Fire accident;, Temperature;, Smoke Concentration;, Fan System