Ventilation systems in tunnels much more often have to serve the purpose of securing smoke free escape routes in the case of a tunnel fire by appropriate smoke management and control rather than the purpose of providing the required air quality, given the modern fleet of vehicles nowadays on European roads.
Tunnel Specific Requirements
Aerodynamics, thermodynamics and ventilation of underground traffic structures are IP Engineering´s core capabilities. As recognized experts in air flow control and smoke management, our staff has decades of first-hand experience, especially applied to the requirements of smoke management in underground transportation facilities.
Beside good engineering practise and the up to date state of technology, standards, laws and guidelines play a major role in the design of ventilation for road, metro and rail tunnels. Such as the German guidelines VDI, the guidelines about equipment of road tunnels RABT and ZTV-ING, the Swiss guidelines SIA and ASTRA for ventilation, the safety manual BSA of the Swiss Federal Roads Office FEDRO (ASTRA), the Austrian road tunnel safety law, the Austrian guidelines RVS, the ASFiNAG road tunnel ventilation design handbook PLaPB, the European Directive on minimum safety requirements for tunnels in the Trans-European Road Network 2004/54/EC, the NFPA and PIARC publications on safety, smoke control and air demand in road tunnels and many other applicable national and international requirements.
Designing the Ventilation Systems
Before a tunnel goes into the construction phase, its intended safety measures design undergoes calculation, simulation and evaluation in every detail. Deep insight into the fundamentals of fluid dynamics and thermodynamics of tunnels is required, the nature of smoke propagation and fire development and the interaction with the ventilation systems has to be understood. The human behavior, also in panic, has to be taken into consideration. Last but not least all relevant design criteria from BIM building information modelling data, tunnel safety codes, guidelines and standards as well as third party requirements have to be considered to create a safe, stable, reliable and state-of-the-art ventilation system.
Calculations and Simulations
IP Engineering reliably delivers tunnel ventilation system design from concept to detailed design to tendering to commissioning and testing.
Where required, all the calculations, modeling and dynamic simulation of the aerodynamics and thermodynamics of complex ventilation and smoke extraction systems, including the effects of traffic, ambient weather and tunnel fire are carried out.
Procurement Support and Site Supervision
Professional support is provided in procurement and commissioning of plants, conduct factory acceptance tests FAT for fans and dampers, site acceptance tests SAT and fire / smoke tests in the tunnel as your agent, prepare technical specifications and bill of quantities (BoQ) for jet fans, supply fans, exhaust fans, fire-dampers, air-quality instruments, flow state monitors and other ventilation components, elaborate system specification for control systems and assistance in their implementation.
IP Engineering assists in tendering of engineering-, installation- and design-services, components and equipment and, last but not least, deliver independent third-party expert opinion, ventilation design review and specialist counseling - worldwide.