Tunnel ventilation desin - CFD and PyroSim Simulation

ARACo

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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.

Design and Simulation of road/rail tunnel ventilation

Design and simulation of industrial ventilation

Metro Ventilation Design and Simulation

Longitudal tunnel ventilation system using Jet-Fans

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.

 

Click here to read more about Pyro sim - PyroSim and CFD Simulation

 

HVAC and Ventilation CFD

CFD - Computational Fluid Dynamics - CFD Simulation and Analysis Project

In continuum mechanics, fluid mechanics to form one large branch. Fluid mechanics begins with the same principles of solid mechanics, but what distinguishes them from one another, this is a fluid unlike solids are not able to withstand shear stress. Knowing this, it is planned equations for fluid motion analysis. This equations to respect both the British and the French mathematician called Navier-Stokes equations. CFD - Computational Fluid Dynamics - in fact is solve the Navier-Stokes equation for the small size of the original model. In this way the total desired volume is divided into very small volumes in operation meshing and after applying the boundary conditions, the equation is solved for all elements. 

CFD has been playing an increasingly important role in HVAC and ventilation, following its continuing development for over a quarter of a century. The information provided by CFD can be used to check the impact of building exhausts to the environment, to predict smoke and fire risks in buildings, to quantify indoor environment quality, and to design natural ventilation systems.

CFD application in HVAC and ventilation can be classified as:

·        CFD analysis for air conditioning in Buildings, Stadium, Cinemas, Hotel, Hospital and …

·         CFD simulation for HVAC inside Server room and Data center

·         CFD simulation for air conditioning inside class room and companies

·         CFD simulation inside tunnel and metro stations

·         CFD simulation inside parking lot and multi floor parking

·         CFD application for indoor farming ventilation

 

ARA Co -Mohammad Ghorbanalibeik

HVAC CFD projects

air conditioning CFD projects

Pyrosim and FDS project

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