• Posted on August 22, 2010 11:15 pm
    By Max
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    The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day. The air that is inhaled is about 20-percent oxygen, and the air that is exhaled is about 15-percent oxygen, so about 5-percent of the volume of air is consumed in each breath and converted to carbon dioxide. Therefore, a human being uses about 550 liters of pure oxygen (19 cubic feet) per day. A person who is exercising obviously uses a lot more oxygen than that. You could determine how much air is moving through your lungs by exhaling into a plastic bag of known volume at each breath and seeing how long it takes to fill the bag. 30 ft structures  volume empty is over 7500 cubic ft. Not counting your extra storage. .269x60= 16.6 cubic feet per hour 7400/388=19.3 days per person 9.2 days for two people.  The more storage you have the less volume. It actually takes longer to reach a 15% co2 level when it becomes dangerous. One oxygen bottle @125 cubic feet. Will give you 6.5 days of oxygen per person. The oxygen bottle requires no power. Rio………….

    Air, Shelters
  • Posted on March 31, 2010 10:02 am
    By Max
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    Shelter ventilation Outside air ventilation is a very critical requirement for all shelters. Any extended use of a sealed shelter will require constant air changes. There have been numerous medical problems related to fallout shelters that were traced to stale air, not radiation poisoning. Older Department of Defense shelter design guidelines recommended 4 cubic feet per minute (CFM) of outside air ventilation per shelter occupant, but most shelter designers today feel this is the threshold for carbon dioxide sickness and much higher ventilation rates are needed. Since outside ventilation air is also necessary to reduce high humidity levels and overheating in any confined area, a more realistic value of 10 CFM per person in colder climates and 30 to 40 CFM per person in hotter climates is more realistic. Several manufacturers offer a rotary hand operated blower designed to ventilate underground shelters continuously, but these can be ineffective in larger shelters due to their low flow rates and the need for manual cranking 24 hours per day. There are several homemade manual ventilator designs similar to the old blacksmith forge bellows available on the Internet. All shelter air intakes, exhaust vents, and piping should include a manual internal shut-off valve or gate. You should also understand that a typical tornado or hurricane can tear off or bend over all pipes and vents sticking up out of the ground or through a concrete floor slab. Locate all vents to minimize the potential for wind damage and provide good structural support. Wind speeds and air pressures related to a nuclear explosion can be multiple times higher than the most severe hurricane. A turned-down steel pipe intake vent will minimize the risk of vandalism or rainwater flooding a below grade shelter. In general, a properly designed air intake will keep air velocities low to avoid pulling in any falling radioactive dust particles. Air intakes should be turned-down steel pipes located high enough above any radioactive dust that has settled out and covered the ground. A combination HEPA filter and an activated charcoal filter are needed to make ventilation air totally safe from biological and radioactive contaminates. All outside air intake and exhaust vents should be manually closed off during the initial threat of any attack, then reopened when the threat is reduced. Many of the automatic spring loaded blast valves manufactured to protect the external openings of military shelters will no longer operate when required after providing a home for birds, rodents, and insects for years. Related Blogs Jobs in the Philippines – Heat Ventilation & Air ConditionTechnician ft of unobstructed ventilation area « religious-evolution.com GReddy EVO 2 Catback Exhaust System 2002-2004 Acura RSX Type S ... AEM Cold Air Intake System 02-06 Acura RSX Type-S | Redline9 2005 Acura RSX-S Weapon*R SW Intake Race Header Street Pass | Redline9 Austin Air Conditioning Repair Wants to Help You PQ365 » 37.2°C: The cat person brings love the temperature Shelter Clip | Female First Blog Austin Air Healthmate Jr. Plus Air Purifier – Sandstone | Air ... JDS Company 34000 Air-Tech 2400 2400 CFM Air Filtration System ... Gucci handbags » Blog Archive » ventilation Ionic Breeze Air Purifier For You | Ionic Air Purifier » Know Your Air Purifier Inside and Out! Accounts Jobs Mumbai | krugerindia.com | Kruger Ventilation ... A Review Of Air Cleaners D.C. General Shelter: It's All About The Oversight - City Desk ... Imagine you yourself have bad credit you might possibly | Hepa Air ... What is Heel Spur Surgery | Hepa Air Purifier Barefoot running stands out as the most recent | Hepa Air Purifier Why You Should Invest In An Air Purifier | TRUE HEPA AIR PURIFIER

    Air, Survival
  • Posted on March 31, 2010 9:47 am
    By Max
    No comments

    Air

    What is air made of? Dry air is primarily made up of nitrogen (78.09%) and oxygen (20.95%). The remaining 1% is made up of argon (0.93%), carbon dioxide (0.03%) and other trace gases (0.003%). Water vapor (water in its gaseous state) is also present in air in varying amounts. Interesting facts: CARBON DIOXIDE: The amount of carbon dioxide, although small, will double in the next 100 years as more petroleum and coal is burned to fuel societies need for energy. About half of the carbon dioxide produced in this way get absorbed by vegetation, which uses it for "food". OXYGEN: While we know that vegetation produces oxygen as part of photosynthesis, the origin of the huge amount of oxygen in the atmosphere is somewhat of a mystery. It is thought to have been produced from chemical reactions in ocean sediments. Related Blogs Hyperbaric Oxygen Chamber Advancements for Traumatic Brain Injury ... Oxygen Sensor Solutions Hydroponics Gardening Indoor Blog » Blog Archive » Carbon Dioxide ... Funny Video: Vitamin Water Win or Fail! By Mike Mozart from my ... Electric Cars, Carbon-dioxide Emissions and Air Conditioning ... Filter Water Bottle Review 2Kg CARBON DIOXIDE FIRE EXTINGUISHER EN3 SERVICED FEB | Johnstone ...

    Air, Survival