Tunnel ventilation desin - CFD and PyroSim Simulation

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Tunnel ventilation design and calculation by PIARC method

In recent years Contemporaneous with the advancement of technology, special consideration needs to transport infrastructure has been raised. One of the main methods of transportation is road and rail transportation. The main feature of these methods of transportation is their generality, which requires special attention to details of design and construction.

Iran also has developed tunnel-digging recently issues related to tunneling, which has been of particular importance and the Resalat tunnel in Tehran, the first tunnel ventilation design project and control system was undertaken.

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Design and Simulation of road and rail tunnel ventilation

The new drilling techniques and TBM devices have led to the possibility of digging long tunnels in less time than usual. One of the requirements for digging long tunnels is proper ventilation. The most common method of urban tunnel ventilation is longitudinal ventilation using jet fans.

To cause proper and healthy ventilation in tunnels, additional equipment, correctly design, and detailed calculations of pollutants and environmental conditions are needed.

 

 

To carry out tunnel ventilation computing feasibility studies, some processes must be performed regularly and in a particular order. To basic acquaintance with the tunnel ventilation calculation process, the main steps of the process, will be mentioned as followed:
- Finding out technical drawings and geographical position of the tunnel
- Studying the Climatic traffic characteristics of the region and view
- Studying the status of pollutants produced by vehicles and analysis of traffic statistics
- Calculations to determine the required flow rate for ventilation in traffic and fire mode
- Studying different methods of ventilation and selection of the appropriate method
- Flow simulation inside tunnels with Fluent, SES, and flow works software
- Figuring out all ventilation equipment’s on the chosen method, along with Technical Specification
Araco by having the suitable knowledge, work experience in the field of tunnel ventilation and utilizing Finite element flow simulation techniques is present to carry out projects in road and rail tunnel ventilation design with high certitude and quality.

 

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