The Day After Tomorrow::
As the weather rapidly deteriorates, Sam goes on a trip to New York City and is . Furthermore, The volume of air would decrease by about a factor of 10 as it The famous Bernoulli equation indicates that when a moving fluid like a . of inane scripts and special effects portraying smoke and mirror physics.
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Hi There !
Do you have a crackpot uncle with wild schemes that only work
occasionally?
That's me!
I would like to devise a system using high-velocity fans to rapidly
evacuate warm air (and replace it with cool air from outside) in my
house in the evening.
Please assume the following:
3000 square foot house
12 foot ceilings
House on one level
64 degrees outside at 8 PM
80 degrees inside at 8 PM
My goal is to reduce the temperature to 70 degrees inside as quickly
as possible. Seems to me there are 3 ways to do this:
1. Set a number of minutes to accomplish the temperature change, and
then buy a big enough fan to accomplish the goal
2. Set a number of minutes to accomplish the temperature change, and
then buy enough individual fans (rated 20,000 CFM) to accomplish the
goal
3. Buy two fans at 20,000 CFM (one fan pumping air in and one fan
pumping air out), and simply accept the number of minutes required to
accomplish the goal
This is not a mathematical question. I never was much good at, "One
train leaves Pittsburgh traveling west at 50 miles per hour..."
Rather, this is a conceptual question. A 5-star answer would be 1-2
paragraphs on how to rapidly evacuate a space----replacing "stale" air
with "fresh" air. I would also be fascinated to know if such "rapid
air exchange" is successfully used in home or industry elsewhere in
the world, but this is not required to answer the question.
All comments greatly appreciated !
Thanks.
Uncle Ron On the instability of small gas bubbles moving uniformly in ::
for the more rapidly moving bubbles. The viscosity of the liquids was Chemistry and Physics. The experimental procedure consisted first of measuring the thus cutting off the desired volume of air. By continued pressure on the
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Health Physics - Fulltext: Volume 89(2) August 2005 p 172-180 USE ::
This paper demonstrates the utility of a portable alpha Continuous Air Monitor in a method to rapidly evaluate air filters for transuranic activity. . and displayed by the CAM are actually the result of a 5-min moving average.
http://www.health-physics.com/pt/re/healthphys/selectreference.htm;jsessionid=JWcWDfqHgCD6p1PxKv0VcBBp6XjcLgKnX1BCDZdjyrP249NwwBnh!1600976923!181195628!8091!-1!1226234934874?an=00004032-200804000-00008&id=P53&data=00004032_2005_89_172_hayes_spectroscopy_|00004032-200804000-00008#xpointer(id(R5-8))|1160690ovftdb|HOME |
The rate of exhaust of the fans operating in parallel are additive
ventilation FAQ
http://www.aivc.org/Faq/faq.html
I would be disappointed if my 'mad uncle' would just install some
fans,
without considering integrated HVAC, computer controlled system ...
with " Dataloggers, kilowatt-hour meters and a water meter (not
shown)
monitoring system performance..."
Here, such ideal mad uncle is picuted with his system:
http://oikos.com/esb/41/eahpstudy.html
"..operating a fan or blower at full speed continuously, or
cycling it on and off, is a sub optimal solution in most
cooling and ventilating applications ..."
http://www.controlres.com/adaptive_cooling.htm
In the present study on zone cooling system in greenhouse,
influence of air temperature inside cooled space, ventilation rate and
shading on cooling load and CO2 concentration was analyzed
experimentally :
http://www.actahort.org/books/440/440_43.htm
http://students.washington.edu/dclang/temp.html
A well-constructed environment accommodates a broad range
of human comfort with heating, ventilating and cooling (HVAC) systems
I would expect him to consider heat pump for cooling/heating too:
http://www.heatpumpcentre.org/activity/hpc_dist.htm
http://www.aivc.org/Publications/Biblipgraphy/BIB05.htm
or more information on residential commissioning contact (e.g.)
http://epb1.lbl.gov/commissioning/perform.html
SEARCH TERMS
ventilation temperature cooling
ventilation temperature cooling
heat pump ventilation cooling
Correction: (it should be "For", not "or") like this:
For more information on residential commissioning contact (e.g.)
http://epb1.lbl.gov/commissioning/perform.html
And if you click on links, it leads to interesting info, like:
Companies: Whole House Cooling Fans (15850)
http://oikos.com/esb/40/tamarack.html
 Get Smart About Monitoring Virtual Machines
 Microsoft Gets Ex-Streamly Cozy with U.K.'s MediaWave
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Physics --- Rapidly Moving a Volume of Air