Clearing Up the Misconceptions of Jet-Fan Ventilation Systems


Jet-Fan Ventilation Systems

A lot of mistrust surrounds the use of jet-fan car park ventilation systems. Dr. Wojciech Węgrzyński says this mistrust has largely stemmed from myths and misconceptions of the systems that have arisen due to inconsistent testing and regulation. He hopes that his presentation at the 2018 SFPE Europe Conference on Fire Safety Engineering, February 5-6, 2018, in Rotterdam, The Netherlands, will help dismiss these misconceptions.

“This presentation will be the first public event in which results of parametric and probabilistic studies on the performance of jet-fan systems will be presented,” Węgrzyński says. “These studies included the investigation of various parameters of the jet-fan system on its performance — dimensioning, thrust, total exhaust capacity, etc. — as well as probabilistic analysis on how car park congestion influences internal flows.”

Węgrzyński is the head of smoke control, signaling and fire automation division of ITB, which is the Polish Building Research Institute in Warsaw. His main areas of interest are active smoke control systems, computational fluid dynamics, and evaluation of the effects of the spread of smoke in buildings. His research is focused on the impact of architectural context of the building on the smoke control performance, as well as finding solutions to make the smoke exhaust systems cheaper and more efficient.

“This presentation is crafted for the designers and consultants, who work with jet-fan car park ventilation systems,” Węgrzyński says. “It may also benefit other fire experts — e.g. designers of sprinklers, structural experts — as well as AHJ and market regulators. Firefighters and officers may also be interested in this topic, as one of the primary goals of the jet-fan systems in the car park is firefighter safety.”

Jet-fan systems are used in many European countries, however, in each country they are regulated differently. This inconsistency has led to the system being misused, underdeveloped, or outright banned in some areas. Węgrzyński is from Poland where jet-fan systems are widely adopted. Węgrzyński has been professionally involved in the design, verification, and validation of these systems for more than 10 years including more than 50 Computational Fluid Dynamics projects of jet-fan car park systems, more than 200 hot smoke tests in more than 20 different car parks (ranging in size from 1,000 square meters to 40,000 square meters).

Jet Fans System

Węgrzyński says attendees of all levels of expertise will find something to take away from his presentation. “If someone knows a lot about jet-fan systems, they may organize their knowledge and possibly learn new design and verification of such systems,” he says. “If someone does not know much about jet-fan systems or doesn’t trust this solution, they may learn much new information about the factors that matter in the system ventilation design, that will influence their performance.”

Register now to get the Early Bird rate for 2018 SFPE Europe. You can find more information on this and other presentations at the upcoming 2018 SFPE Europe Conference on Fire Safety Engineering here.

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