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Re: Quick built shelter?

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Posted by nicksanspam on October 26, 2005, 8:06 am
 

Omaha, where 540 Btu/ft^2 of sun falls on the ground and 990 falls on
a south wall on an average 24.4 F December day with a 32.9 daily max?


How about a plastic film greenhouse?


Three people can put up a $00 14'x96' greenhouse kit in a field in a day.


A 20'x24' ID greenhouse might have 7 $0 20'-diameter semi-circular bows
on 4' centers, each using 8 8' 1x3s. Screw 1x3 spacer blocks every 2' to 4,
bend them to a 10' radius, bend 4 more and screw them onto the blocks to
make a curved sandwich, add 3 24' 1x3 purlins between the bows, cover them
with a $8 24'x32' piece of 4-year UV greenhouse polyethylene film, and add
endwall framing on 4' centers with another 314 ft^2 ($6) of poly film.

Then add another greenhouse around it, 1' larger, and fill the space between
them with R36 bags of mulch, dry leaves, etc, with a few voids for windows.


If 0.9x24x(540x5.5+990x9.5) = 268K Btu of sun enters the lower third of the
south wall over 6 hours on an average December day and 6h(T-24)276ft^2/R1
leaves it during the day and 18h(65-24)276/36 leaves it at night and
24(T-24)276/36 leaves the ceiling and 24(65-24)276/36 leaves the north wall
and 24(65-24)314/36 leaves the endwalls, T = 159 F inside the south wall
and near the ceiling during the day :-) Well, maybe 130, given windows and
radiation loss from the south wall.

If C Btu/F of ceiling mass is 130 F on an average day and cools to 75 over
5 24 F cloudy days while providing 5x24(65-24)1082/36 = 148K Btu of heat,
C = 148K/(130-75) = 2689, eg 2689/62 = 43 ft^3 of water in 2 $2 20'x30"
poly film ducts laid flat 4' wide with 3" of water inside, over foil (to
avoid overheating the space below) over wire fence under the ceiling.


Solar heat, and poly film "windows," and a few PV panels and CFs...


The propane stove, and gravity fed hot water? The 130 F ceiling water might
help distill wastewater in a duct with holes near the top surrounding the
inner duct, with another duct around that to condense it and no loss of heat
to the outdoors.


And solid walls and doorlocks, vs mad dogs and a chain link/razor-wire fence.

Nick


Posted by Larry Caldwell on October 26, 2005, 3:39 pm
 
nicksans...@ece.villanova.edu wrote:


Gee, a whole other chapter to Three Little Pigs.


Posted by nicksanspam on October 26, 2005, 9:07 pm
 

Karl, Dick and Scooter?

Nick


Posted by Larry Caldwell on October 27, 2005, 3:41 pm
 nicksans...@ece.villanova.edu


Dumb, Dumber, and Total Idiot.

But then, if you want to bet on no wind storms in the winter in the
Midwest, put your money down, bub.


Posted by The Smolenski's on October 26, 2005, 11:25 pm
 How about a large 12foot high x 20 feet x60 feet  plastic sheeted space with
with a series of smaller plastic sheeted spaces within. I live by lake
michigan and saw a family at a beachfront campground with a huge
tarp(30'x30') set up for shade and 4 small tents set up under. the tents
were the sleeping spaces and the area left over was this large covered
living space.  It was quite spacious and looked more inviting than the big
buck motorhomes parked nearby.

the whole idea is to have this large encompassing envelope sheltering a
series of smaller envelopes
when the sun is out the outer areas are liveable space
or something that can be temporarily heated when entertaining.  for private
times you can head into one of the smaller structures some might be covered
with green tarp material for sleeping  others might be black tarp togive
ultimate privacy like fior a bathroom
the secret would to have a nice cheap plywood lfloor for the whole space you
might want to lay an insulating layer of straw under the ply floor

smo
smo
<



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