Construction Sector

CFD CO Concentration analysis of Lodha Luxuria Residential Building Car Parking Basement, Thane

The objective of this project is to examine the effectiveness of the planned ductless ventilation system in the car park basement of Century 21 Mall to prevent CO poisoning by keeping the CO concentration level below the prescribed safety limits.CFD simulations can predict stagnation region(which would have high CO concentration) by calculating the flow pattern of the basement. Initial simulation results showed high CO concentration caused due to stagnation region in the basement(Location and size of the stagnation region depends on geometry of the building and position of the inlet/outlet vents).Using calculated optimization techniques, the stagnation regions were removed by varying the jetfan positions. The final simulation(simulation using optimized jetfan locations) results showed reduced CO concentration and effective flow pattern. The simulations are made as per ASHRAE standards. (CO simulations can also be done for duct ventilation system).

Conclusion:
  1. Initial CFD results for the basement showed high stagnation areas, which causes high CO concentration(257 ppm, which is above the prescribed ASHRAE standard).
  2. Based on the results the flow rates and the position of the ducts were changed, to increase the efficiency of the ventilation system.
  3. The final CFD results showed the effectiveness of the modified design and the CO concentration level was within the acceptable limits of the standards.

CFD analysis of academic block, Loyola Institute of Technology

The academic block is located inside LOYOLA Institute of Technology. The class rooms and lecture halls in the academic block are designed to be naturally ventilated. Computational Fluid Dynamics was used to analyse the effectiveness of the naturally ventilation. The simulation was carried out based on the details provide by the client and also based on the climatic data(wind velocity, temperature and humidity) obtained by different methods. The results showed high temperature and humidity in certain region of the basement. Based on the result the client has made extensive changes in the building to increase the comfort level of the students.

Conclusion:
  1. The result showed high temperature and relative humidity profile in specific areas due to lack of ventilation.
  2. Based on the result the client has made extensive changes in the building to increase the comfort level of the students , particularly by providing artificial ventilation to the areas of concern.

CFD Smoke Simulation of City Center mall car Parking basement, Raipur

The objective of this project is to examine the effectiveness of the ductless ventilation system in case of fire and provide the client with data that would be useful in optimizing the fire safety system. In case of fire break out, most of the fatalities are caused by smoke poisoning and not directly by the fire. So it's up to the ventilation system to effectively remove the smoke and maintain enough visibility for evacuation and firefighting efforts to carry on. (Smoke simulations can also be done for jet fan ventilation system).

Specifications:

The simulation was carried out using fire size of 4MW(based on the geometry of the basement) and octane as the fuel. An optimized fire curve which closely simulates automobile fire in a basement, was used for a duration of 0 to 10 minutes.

Conclusion:
  1. Initial simulation was carried out based on the location of the jetfans provided by the client. From the result it was observed that, the basement was completely filled with smoke within 10 minutes of fire start.
  2. The ventilation system based on the initial jetfan locations did not remove the smoke even after adequate time.
  3. Based on the CFD results the ventilation system was modified by varying the jetfan locations to remove the stagnation region, which effectively enhances the flow pattern.
  4. The final results showed effective smoke clearance and visibility of 30m within 25 minutes of fire start.

Optimizing wind environment around buildings

A single high-rise building can cause aerodynamic disturbances around it (particularly in the downstream region) which causes strain on the building and its neighbors. The building design plays a major part in causing this disturbance. CFD is used in predicting such aerodynamic instability and isolating the stress on the structure. This resulting data would help engineers / architects to consider these stresses and help in making the buildings safer.

CFD Thermal Comfort Simulation of Tyres Building

The objective of the project is to check and optimize the designed duct ventilation system at the PCR Curing area of JK Tyres building. Due to this process and its machineries there is an increase in temperature in the area which would result in discomfort for the workers and decrease in productivity. It is the job of the ventilation system to provide adequate air circulation and to reduce the temperature around the work stations. Based on the details provided by the client, CFD thermal comfort simulation was carried out and with the help of the results the ventilation system was optimized.