Project Case Study
Jet-fan ventilation, air velocity and smoke (CO₂) evacuation study for Basement 2 (T10), covering Zone 1 and Zone 2.
Jet fans
10 × GJX-36
Exhaust shafts
2
Fan airflow capacity
3,620–4,070 CFM
Comparison times
0 s / 60 s
Project summary
This study evaluated jet-fan ventilation performance during a fire scenario by tracking air velocity and CO₂ concentration over time to review movement towards the exhaust paths.
Results include velocity contours at the jet-fan mid-plane and CO₂ concentration contours at 0 seconds and 60 seconds.
Study area
Basement 2 (T10), Zone 1 and Zone 2
Jet fans
10
Exhaust shafts
2
Fan model
GJX-36, 355 mm diameter
Airflow capacity
3,620–4,070 CFM
Ceiling clearance
500–700 mm
Comparison times
0 seconds and 60 seconds
01 / Context
HyperCurve Solutions Private Limited carried out a Computational Fluid Dynamics (CFD) study of Basement 2 (T10) in a car parking facility to evaluate jet-fan ventilation performance during a fire scenario. The simulation tracked air velocity development and smoke represented by CO₂ concentration over time, with the aim of assessing how effectively hot gases are directed from the parking zones towards the exhaust paths.
02 / Scope
The study examined the basement layout across Zone 1 and Zone 2, the placement of jet fans and exhaust shafts, airflow development after fan activation, and the movement of CO₂ concentration contours over the reported time interval. The report presents the results as an initial assessment supporting a more detailed CFD stage for design validation and code-compliance reporting.
Model preparation
The report identifies the study area as Basement 2 (T10), comprising Zone 1 and Zone 2. The boundary-condition layout includes 10 jet fans, 2 exhaust shafts and exhaust-gas generation points.
GJX-36 with a diameter of 355 mm and a stated airflow capacity of 3,620–4,070 CFM.
The specified clearance from the ceiling is 500–700 mm.
Simulation setup
A three-dimensional CFD model represents the basement with parked vehicles. The boundary-condition plan marks the jet fans, exhaust shafts and exhaust-gas generation points. These model features establish the configuration used to examine directional airflow through the parking driveways and smoke movement towards the exhaust routes.
Jet fans
10
Exhaust shafts
2
Zones
Zone 1 and Zone 2
Simulation results
Velocity contours at the jet-fan mid-plane compare the simulation at 0 seconds, before fan activation, with the result at 60 seconds after activation.
The initial condition before the jet fans are activated.
The report states that the jet fans establish strong directional airflow along the driveways within 60 seconds, pushing air towards the exhaust shafts.
Smoke movement
CO₂ concentration contours compare the initial condition at 0 seconds with the distribution at 60 seconds.
The report describes the concentrations as low and localised, with smoke pockets moving towards the jet-fan and exhaust paths rather than accumulating in stagnant high-concentration zones.
Engineering interpretation
These findings summarise the supplied report's stated simulation results. They are not an independent validation of measured site performance.
01
The 10 jet-fan and 2 exhaust-shaft arrangement establishes strong directional airflow along the driveways across both zones within 60 seconds.
02
The presented CO₂ contours are low and localised, with no stagnant high-concentration zones reported. Smoke pockets move towards the jet-fan and exhaust paths.
03
The report presents an initial assessment and recommends proceeding to a detailed CFD stage for final design validation and code-compliance reporting.
The report concludes that the jet-fan placement channels smoke towards the exhaust shafts and recommends a detailed CFD stage for final design validation and code-compliance reporting.
Project outputs
The study provides model views and visual result outputs to review airflow direction and smoke movement in the parking basement.