Fire and the subsequent spread of smoke in buildings in many cases cause loss of life and considerable damage to property. Despite all the experience and years of research in this area, there is still some uncertainty, both technical and purely normative, about how to protect people and minimize the consequences of a building fire.
In this context, and in light of the fact that smoke, in its many components, is the cause of loss of life, the cornerstone for the HVAC designer is a careful analysis of ventilation networks and flue gas venting systems to ensure safety and protect public health and property.
Smoke Removal Systems Help Avoid Smoke in Buildings
In this paper we consider a possibility of mathematical modeling of smoke exhaust system at Zhataysky shipbuilding and ship-repair plant.
The purpose of the study is to determine the smoke removal performance of smoke removal systems, analysis with the existing design, mathematical modeling of smoke removal processes in order to compare with the calculated parameters.
All calculations of smoke exhaust systems are made according to the maximum loads, of the issued, the rate of combustion and the heat of combustion of substances.
As input data for the calculation of smoke protection systems for buildings of various purposes, the worst, in terms of smoke protection, combinations of meteorological conditions and conditions inside the building during a fire are taken.
As the initial data are “Information about the engineering equipment, about the networks of engineering – technical support, a list of engineering – technical measures, the content of technological solutions” and the architectural solutions of the design documentation.
For Yakutia, the climate is sharply continental and arid, which is determined by the geographical location and the peculiarity of atmospheric processes. Winters are long, cold and snowy, and summers are short, for the most part. Calculated temperatures of the cold five-day period from (-42°С) to (-60°С); average wind speed in January reaching 7,7 m/s; winter fog that occurs at temperatures close to (-42°С) and below; permafrost soils occupying the most part of Yakutia; prolonged heating period.
As an example, we consider a room “Department of oils and paints”, the area of the premises – 550.64 sq.m., smoke removal systems are also used for exhaust ventilation of the warehouse. For intensive ventilation of the premises are provided for inclusion of roof fans of the smoke exhaust system in the mode of ventilation. The air supply is ensured by opening the gates. Smoke exhaust fans UKROV from VEZA are provided in Zhatai shipyard.