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rick - question about greenhouse  RSS feed

 
Pia Jensen
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Awesome to read your experience and ideas. I'm thinking about a hot and cold air transference system at the base of the greenhouse framework. Current thinking and pics are here ... the wind is very regular and flows nicely under the back wall and into the house front door and crosses in front of the front door from the sides also. I plan to block that flow for winter heat trapping, but it will be very nice in the summer, I think, if I install a misting system sited over a "coco-husk" tube to act as a swamp cooler for moments at a time. I'm not thinking about energy requirements at the moment (plan for gravity feed water tank later)... I'm just interested in the mechanics of such a system. What do you think?

View from house under frame
 
Rick Austin
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Pia Jensen wrote:Awesome to read your experience and ideas. I'm thinking about a hot and cold air transference system at the base of the greenhouse framework. Current thinking and pics are here ... the wind is very regular and flows nicely under the back wall and into the house front door and crosses in front of the front door from the sides also. I plan to block that flow for winter heat trapping, but it will be very nice in the summer, I think, if I install a misting system sited over a "coco-husk" tube to act as a swamp cooler for moments at a time. I'm not thinking about energy requirements at the moment (plan for gravity feed water tank later)... I'm just interested in the mechanics of such a system. What do you think?

View from house under frame

I like evaporative cooling systems but they won't work in my environment because the outside humidity is too high in the summer...If you are in a more arid region it might work for you. The only problem is what creates the mist? If you need to provide power somehow, it may not be sustainable.


 
Pia Jensen
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Rick Austin wrote:

I like evaporative cooling systems but they won't work in my environment because the outside humidity is too high in the summer...If you are in a more arid region it might work for you. The only problem is what creates the mist? If you need to provide power somehow, it may not be sustainable.


Rick Austin wrote:

I like evaporative cooling systems but they won't work in my environment because the outside humidity is too high in the summer...If you are in a more arid region it might work for you. The only problem is what creates the mist? If you need to provide power somehow, it may not be sustainable.



awesome,the general idea is sound for an evaporative process - we are now in "Fall" heading into winter here, so I have about 7 months to figure out the misting system.

the roof of the greenhouse slants toward the street (angle 6 degrees)

the greenhouse is sited where the heaviest rains come down from

thinking roof run off to water tank at front west corner at base height of 2meters... looking for water pressure required for misting system now...

found: "It would be difficult to run a lawn sprinkler with anything less than about 20 psi of pressure" www.thecenterforrainwaterharvesting.org/5_pressurization.htm and am now wondering about tank size....

 
C. Letellier
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Location: Greybull WY north central WY zone 4 bordering on 3
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Why not just large cooling pads wetted on the inlet side of the green house and let natural convection drive the system? Vent high, let the cool air in low and then the only need is for the ability to get the water up to the pads which is an insignificant amount of power. Then if you need more flow your ventilation fan will pull even more air through the pads.
 
Pia Jensen
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ah,wet pads! didn't know - cool idea! so much easier too, fits right in with my do more with less aspirations
 
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