[Greenbuilding] Shipping container home

[Benjamin Pratt]

Don't know the details of it's construction. But it looks like a nice space.
http://www.offgridworld.com/ugly-duckling-shipping-container-home-built-by-artist-is-a-beautiful-swan-on-the-inside/


On Tue, Nov 19, 2013 at 7:26 AM, nick pine <nick at early.com> wrote:

> Sean Rauch wrote:
>
> -We live in Manitoba Canada and plan to build just outside of Winnipeg
>
> http://rredc.nrel.gov/solar/calculators/PVWATTS/version1/
> International/pvwattsv1_intl.cgi says 3.13 kWh/m^2 (992 Btu/ft^2) of sun
> falls on a south wall on an average December day in Winnipeg.
>
> The stat file at http://apps1.eere.energy.gov/buildings/energyplus/cfm/
> weather_data3.cfm/region=4_north_and_central_america_wmo_
> region_4/country=3_canada/cname=CANADA says the average December temp is
> -14.1 C (6.6 F) with a -12.1 high.
>
> -I'm working with a model right now that has 2000 square feet of living
> space spread out over two floors
>
> ... eg 32'x32'x16'-tall, with a 1024 ft^2 ceiling and 2048 ft^2 of walls.
>
> -We're planning the basic south facing windows with thermal mass inside to
> collect as much winter sun as possible.
>
> That could work. If the house has no internal heat gains and it's 75 F on
> an average day and 65 after 5 cloudy days in a row (with a 2^-5
> probability), 65 = 6.6 + (75-6.6)e^(-5x24/RC) makes time constant RC = 759
> hours. With US R30 walls and an R60 ceiling  and  R30 night- and cloudy-day
> window insulation and a 1/R = G = 1024/60+2048/30 = 85 Btu/h-F cloudy-day
> conductance, it would need C = 759hx85Btu/h-F = 64.8K Btu/F of room temp
> thermal mass, eg 64.8K/25 = 2591 ft^3 of concrete or 4048 ft^3 of
> cylindrical rock gabions, about 25% of the house volume, or more, with less
> night window insulation.
>
> -The house wont be off grid but I don't want to rely on the grid for any
> of the climate control demands of the house.
>
> It might have a shiny massy ceiling heated by passive air heaters, with a
> thermostat and a slow low-power ceiling fan to mix down hot ceiling air as
> needed to keep the house exactly 70 F for 5 cloudy days, or 70 F during the
> day and 60 at night. Here's a nice air heater:
> http://www.builditsolar.com/Projects/SpaceHeating/solar_barn_project.htmWith hot ceiling air and colder air outdoors, you might use R2 twinwall
> polycarbonate with 80% solar transmission instead of a single layer in
> balmy Montana. Gary Reysa and I tried this scheme in 2010, with one big
> mistake, an uninsulated partition wall that turned the air heater into an
> air cooler at night... http://www.builditsolar.com/
> Experimental/dCube/Barra/BaraBox.htm
>
> With no windows (use flat screen TVs and outdoor cameras), the house would
> need about (65-6.6)85 = 5K Btu/h or 119K Btu/day (collect 20K Btu/h for 6
> hours) or 596K Btu for 5 cloudy days in a row. At (say) 160 F, a 1 ft^2
> twinwall air heater would gain 0.8x992-6h(160-6.6)1ft^2/R2 = 460 Btu on an
> average day, so the house could have 119K/460 = 260 ft^2 of air heater
> glazing, eg an 8'x32' south wall. A 1024 ft^2 ceiling with a 3 Btu/h-F-ft^2
> slow 2-sided airfilm conductance would be about 20KBtu/h/3KBtu/h-F = 7 F
> cooler than the hot air around it when collecting heat on an average day,
> and a 5.5"x32' air heater flow path with A = 14.7 ft^2 and H = 8' would
> make the air heater air (20K/(16.6x14.7sqrt(8)))^(2/3) = 9.4 F warmer than
> the air near the ceiling, so the ceiling would be 160-9.4-7 = 144 F on an
> average day.
>
> A 1000 cfm ceiling fan could keep the house 70 F with a
> 70+5KBtu/h(1/3K+1/1K) = 77 F ceiling, and (144-77)C = 596K makes C = 4.3K
> Btu/F for 5 cloudy days in a row, ie 4.2 psf, eg 0.8 inches of water, or
> deeper water in trays that cover less ceiling surface.
>
> Have fun :-)
>
> Nick
>
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-- 


b e n j a m i n p r a t t

professor art+design
the university of wisconsin stout
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