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Fire ventilation in terms of design

What does the concept prepared by Mercor Design department contain?

In case of overpressure systems for staircases, vestibules, lifts and smoke exhaust systems with mechanical air compensation for  corridors and  staircases, the concept includes system’s calculations in pdf format, system’s scheme in dwg format, bill of materials in xls format, system’s description (optional) and system’s operation principle.

In case of a smoke exhaust concept for car park, the scheme is replaced by a car park and roof projection (optional) with schematically arranged system’s components.

What documents are needed to create the concept of fire ventilation system?

To implement the concept of fire ventilation system, it is necessary to provide the scope of the project, type of the building, cubature data of the spaces for which the concept is to be developed (height, surfaces, volumes, etc.), projections and cross-sections in dwg format together with a technical description for the scope of the project being developed, address and name of the investment, fire expertise if required, or fire protection conditions if created.

In what design situation is CFD simulation of the protected space required?

CFD simulation is a study evaluating the effectiveness of a designed fire ventilation system. If the system and its components have not been designed based on calculations supported by a standard or other document commonly known as a source of technical knowledge, CFD simulation should be done. Numerical analysis will also serve as calculations for the project.

For example, an overpressure system designed based on PN-EN-12101-6 or ITB 378/2002 does not require preparing CFD simulation.

A smoke exhaust jet ventilation system for a car park, made on the basis of preliminary assumptions, should be checked by CFD simulation.

If there are doubts concerning proper operation of the fire ventilation system, then CFD simulation should also be prepared to confirm the system's effectiveness.

What is a CFD simulation in case of fire ventilation?

The CFD simulation is a numerical representation of a given element / event and its operation, showing a number of parameters occurring during its course.

In case of fire ventilation, it is a simulation of i.e. a fire outbreak in a given space and the operation of fire ventilation, aimed at meeting the assumptions stated in the project, mainly ensuring the safety evacuation, protection for the building construction and improving safety conditions for rescue teams. Based on the criteria set by legal regulations / guidelines  KGPSP, ITB etc. , we can assess whether a given fire ventilation system meets the assumptions made in the project or not and should be corrected.

The simulation is performed after creating the primary version of the fire ventilation project and based on the results of CFD analysis, possible changes are made to the design to improve the effectiveness of the fire ventilation system.

When fans without temperature resistance are used in fire ventilation systems?

Fans without temperature resistance (BO) are used in fire ventilation systems to supply air from outside. In this case fan circulates fresh air with an ambient parameters, therefore there is no need of using fans resistant to the mixture of hot air and smoke. BO fans can also be used for exhaust in comfort ventilation systems in the car parks.

If you have additional questions, please contact us.