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re: outside air & productivity
21 dec 2000
ronald herfurth wrote:
>this could be a new sustainability method; put a greenhouse (or sunroom) on
>the south side of office buildings, fill it full of tomato plants, and draw
>all of the return air from the offices (which is usually around 1,000 ppm
>co2) through the green house before it goes back to the ahu.
sounds good to me. greenhouses are cheap (about $1/ft^2) and tomatoes
photosynthesize about 0.2 grams of co2/h-ft^2, growing about 50% faster
in air with 1000 vs 330 ppm co2.
>of course there would be the usual amount of relief and outside air
>at the ahu.
likely less. is that legal? humidity is another issue. on a sunny day,
the plants can evaporate about 0.15 lb h20/h-ft^2. we might blow the
air back to the building via a poly duct surrounding another poly duct
full of water, for dehumidification and overnight heat storage.
>happy holidays to all
happy solstice to you.
nick
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