The paper “ Natural and Mechanical Smoke Ventilation Systems – Challenges and Strengths ” is a cogent variant of assignment on engineering and construction. Ventilation entails the movement of the outside air into a building or room and distribution of the air in the construction. Ventilation of a building can be in three different forms, that is, natural, mechanical as well as hybrid (mixed -method) modes of ventilation. However, this document puts into consideration only the natural and mechanical modes of ventilation within the corridors of the apartment blocks (Faber et al. 2014). Integrating smoke ventilation systems within the corridors of the building enhances the safety potentiality of the occupants residing in those apartment blocks.
Smoke can be controlled either naturally or mechanically by the use of vents. The natural and mechanical smoke ventilations aim at regulating the smoke in the apartments, provide the escape routes of the smoke, enhance firefighters to work out the operation smoothly, and reducing both the loss of lives and properties. Despite the fact that the two smoke ventilation systems have similar functions, they are applied and operated differently (Cote, 2003).
The operation of the Mechanical System of Smoke Ventilation is done by heat and smoke extraction from the apartment area and consequently depressurizing the place. The natural system of smoke ventilation, on the other hand, involves the firefighters to access entrance without smoke thus providing a way for heat and smoke from the structure building. The two methods of smoke control entail the resistance of the fire from damaging valuable resources in the buildings. Therefore the core purpose of this report is to elaborate on the applicability of both mechanical and natural smoke system ventilation Systems in big apartments. Natural VentilationNatural ventilation is simpler, reliable, requires less energy, and it's less noisy, therefore it is more preferable and beneficial compared to mechanical ventilation.
In its application, Natural Ventilation allows smoke to escape through the ordinary corridors of residential buildings. However, the practicability of the system is determined by the winds and the innate beam. Natural ventilation functions by taking advantage of normal forces e. g. thermal buoyancy alongside wind to thrust air via the ventilator. What constrains the smoke is its ability to float in the air as soon as it parts the fire (Vedavarz et al 2007).
The buoyancy drives are at times lesser compared to the influence of the wind, therefore, wind affects the performance of the Natural Ventilation System greatly. For the effectiveness of natural ventilation, and exhaust aperture enhances the proper circulation of airflow is required (Cote, 2003). Challenges. Because of leakages found within the house structures, air should constantly be propelled into the apartment to maintain the pressure difference. Actually, the amount of air required greatly relies on the quantity of outflow intriguing the building.
This profoundly depends on the total number of doors and or any other opening that is able to operate as getaways for air allowing the leakage in the region of the walls, the area, and the walls nature of construction from the confined spaces (Building Regulations 2000, 2006). A difficulty arises in case the doors and the other opening within the secluded area are wide open. The surface area of seepage tremendously increases making it difficult to uphold the correct pressure balance. Therefore, the smoke ventilation system should offer protection even though the outlet openings e. g.
doors and windows are open and the pressure difference is limited. However, if pressure is in excess when the doors are closed up, it causes the door very difficult to open hence hindering the escape of the smoke in the protected areas.
ANSI. (2007). American National Standard for the recirculation of air from industrial process exhaust systems. Fairfax, VA: The Association.
Barber, N. (2012). Buildings and structures. London: Raintree.
Beard, A. & Carvel, R. (2005). The handbook of tunnel fire safety. London: Thomas Telford.
Bre, 2014, Computer modeling: microclimate performance assessment, available http://www.bre.co.uk/pdf/049.pdf
Burke, R. (2008). Fire protection systems and response. Boca Raton: CRC Press.
Cote, A. (2003). Operation of fire protection systems: a special edition of the Fire Protection Handbook. Quincy, Mass: National Fire Protection Association.
Faber, O., Kell, J., Oughton, D. & Wilson, A. (2014). Faber & Kell's Heating & air-conditioning of buildings. London: Routledge.
Fernando, H. (2013). Handbook of environmental fluid dynamics. Boca Raton, FL: Taylor & Francis.
Fitchen, J. (1989). Building construction before mechanization. Cambridge, Massachusetts: MIT Press.
Godish, T. (2001). Indoor environmental quality. Boca Raton, Fla: Lewis Publishers.
Haines, R. & Wilson, C. (2003). HVAC systems design handbook. New York: McGraw-Hill.
Ingason, H., Li, Y. & Lönnermark, A. (2014). Tunnel fire dynamics. New York: Springer.
Klote, J., Milke, J. & Turnbull, P. (2012). Handbook of smoke control engineering. Atlanta, GA: American Society of Heating, Refrigerating, and Air-Conditioning Engineers.
Mobley, R. (2001). Plant engineer's handbook. Boston: Butterworth-Heinemann.
Morgan, H. (1999). Design methodologies for smoke and heat exhaust ventilation. Garston: CRC.
Ramachandran, G. & Charters, D. (2011). Quantitative risk assessment in fire safety. London New York: Spon Press.
Rock, B. (2006). Ventilation for environmental tobacco smoke. Oxford Burlington, MA: Elsevier Butterworth-Heinemann.
Snow, D. (1991). Plant Engineer's Reference Book. Burlington: Elsevier Science.
The Building Regulations 2000. (2006). The Building Regulations 2000. Approved Document B: fire safety. S.l: TSO.
Vedavarz, A., Kumar, S. & Hussain, M. (2007). HVAC handbook of heating, ventilation, and air conditioning for design and implementation. New York: Industrial Press.