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Jose Santiago

Jose Santiago. Email: jsantiag@spsu.edu. Definition- Natural Ventilation. Natural Ventilation in my own words is the use of natural warm and cold air from outside to ventilate an interior space.

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Jose Santiago

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  1. Jose Santiago Email: jsantiag@spsu.edu

  2. Definition- Natural Ventilation • Natural Ventilation in my own words is the use of natural warm and cold air from outside to ventilate an interior space. • natural ventilation- The Free Dictionary states: ventilation without the use of artificially induced energy and the machines which it drives; the forces used are wind and the exchange of heat from within the barn and the external air, controlled by ventilation devices in the walls and the ceiling.

  3. Natural Ventilation Systems • An integrated system utilizing the concept of natural, controlled ventilation providing a healthy alternative to air conditioning systems in modern buildings. The benefits of a reduction in carbon emissions and a reduction in running costs allow designers the opportunity to develop more environmentally friendly buildings.

  4. Advantages of Natural Ventilation: • Creation of healthy room conditions as precondition for physical and mental wellbeing • Prevention of structural damage because of moisture through natural ventilation • Saving in potential investment costs by without air conditioning plant • Reduction of energy consumption and operating expenses • Low repair and maintenance expenditure • Increase in value of property • Positive image for companies by ecological design of buildings

  5. Ventilation Concepts: • Single Sided Ventilation:Rooms with windows on one side only. Cold air will stream in, and warm air will stream out again through the same window. This kind of ventilation is normal and generally practised, but it is only useful up to a certain room depth.

  6. Ventilation Concepts: • Single Sided Double Opening:An advancement of the single sided principle provides a double opening, which is considerably more efficient.

  7. Ventilation Concepts: • Cross Ventilation:In the case of cross-ventilation, (windows open on both sides of the room/building) the pressure difference is used between the side of the building facing the wind and the side away from the wind. The positive pressure on the windward and/or a vacuum effect on the lee side of the building, causes air movement through the building from the windward to the lee side.In order to obtain the optimal airflow with minimal draught, the windows on the windward side are opened less than on the lee side.

  8. Ventilation Concepts: • Stack Ventilation:In a similar way to smoke ventilation, the natural buoyancy of hot air is used to allow venting through high level vents. Replacement fresh air enters from the lower vents.An advancement of this system is used by a double façade. This works on the same principle as above (utilizing both cross and stack ventilation) but also offers an ideal solution when the building is adjacent to roads and areas of high acoustic emissions.

  9. Ventilation Concepts: • Passive Cooling:Floor slabs can absorb heat build-up during daytime usage through a combination of solar gain, electronic equipment and user occupancy. As the external temperature drops at night, the building can be cooled by partially opening the vents around the building - often called night-cooling or night-purging.The example shown below uses an atrium design (utilising stack and cross ventilation) for this effect.

  10. Past • Wind towers such as The burj al hawwa catch wind from a higher altitude and multiple directions. The wind channels down into the interior of the building to cool during the hot climate.

  11. Present • In present architecture like The Three Stones House With White Walls, small windows are integrated into the design to allow natural ventilation to circulate throughout the home.

  12. Nigerian Termites The Nigerian Termites create lines of concentrated veins in the basement of the colony. The water used from the termites starts to evaporate and sticks to the veins, making the temperature cooler. The warm air rises out of the colony and the cooler air from the veins rises through chambers into the colony.

  13. Bibliography • Dyer Environmental Controls. "Google Image Result for Http://www.dyerenvironmental.co.uk/day_ventilation.gif." Google. Web. 17 Jan. 2011. <http://www.google.com/imgres?imgurl=http://www.dyerenvironmental.co.uk/day_ventila tion.gif&imgrefurl=http://www.dyerenvironmental.co.uk/natural_vent_systems.html&usg= __5RulEt4x7ziMDUt6O0WAx7RmKvA=&h=217&w=250&sz=11&hl=en&start=4&sig2=maXL2 oigezNflBP6_VkSEw&zoom=1&um=1&itbs=1&tbnid=RmVFsp8au1cmmM:&tbnh=96&tbnw= 111&prev=/images?q=natural+ventilation+system&um=1&hl=en&sa=X&rlz=1T4TSHB_enUS 297US298&tbs=isch:1&ei=W_IwTYvIE4K78gavhuy6CA>. • "Google Image Result for Http://www.solaripedia.com/images/large/2096.jpg." Google. 2010. Web. 17 Jan. 2011. <http://www.google.com/imgres?imgurl=http://www.solaripedia.com/images/large/2096.jpg&imgrefurl=http://www.solaripedia.com/1 3/205/2096/wind_tower_qatar.html&usg=__ujrQTBW8TZcvI4DOOplTy6Tm0IE=&h=333&w=500&sz=131&hl=en&start=10&sig2=Gb6NW z3gP9_M-hMB_sNFAQ&zoom=1&um=1&itbs=1&tbnid=GyGfKE9dv- N1tM:&tbnh=87&tbnw=130&prev=/images?q=wind+catching+towers&um=1&hl=en&sa=N&rlz=1T4TSHB_enUS297US298&tbs=isch:1&ei =nrw0TZXIIsGC8gamoMTcCA>. • http://image57.webshots.com/57/4/8/28/2779408280066184551GIccZG_ph.jpg • "Natural Ventilation." ArchitecturalDesign.com. 09 Feb. 2010. Web. 17 Jan. 2011. <http://www.architecturesdesign.com/tag/natural-ventilation/>. • Saunders Comprehensive Veterinary Dictionary. "Natural Ventilation - Definition of Natural Ventilation in the Medical Dictionary - by the Free Online Medical Dictionary, Thesaurus and Encyclopedia." Medical Dictionary. 2007. Web. 17 Jan. 2011. <http://medical- dictionary.thefreedictionary.com/Natural ventilation>. • Youtube. "YouTube - Termites - Life's Ultimate Architects." YouTube - Broadcast Yourself. 01 Mar. 2006. Web. 17 Jan. 2011. <http://www.youtube.com/watch?v=0m7odGafpQU>.

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