Return to the Northern Gardening Forum | Post a Follow-Up

 o
cooling element?

Posted by martijn23 8a nl (My Page) on
Fri, Jun 22, 07 at 7:05

Hi there,

I absolutely have no idea where to post this, but here goes. I'm planning to construct my own 'cool house', that is, a reverse of a greenhouse.
My plan would be to have a cooling element mimick an alpine climate, as to be able to grow alpine plants that only thrive in a very cold climate.
My ideal would be some sort of a thermostat connected to a pc, so I can progam temperature on a day to day basis (also multiple temperature settings throughout the day to simulate day/night). any suggestions? anything?:-) thank you!

Martijn


Follow-Up Postings:

 o
RE: cooling element?

Whew, imagine the electrical bill, as you cool that greenhouse!

Don't know if you need the PC, a simple $50 set back thermostat connected to the air conditioner should work. My home thermostat allows for multiple settings thoughout the day and different settings each day of the week. Though, for plants, wouldn't the same temp work everyday?

How will you simulate winter and three feet of snow cover?


 o
RE: cooling element?

hi judy,

I'm looking to re-create a climate, that is with actual frost inside (something smallscale, maybe 4sq. feet:-) )
so I'll be needing a cooling element from a freezer or something.. the idea sounds pretty simple eh.. but putting it into practise is a another thing!


 o
RE: cooling element?

I think you will need a small window or room air conditioner, the cooling element from a freezer or fridge includes a lot of tubing and a fan!

Alpine plants, even in cool climates or high altitudes, grow in the summers when it is warmer with long sunny days and they rely on good snow cover for protection from frost during the winter.

So is your plan to create a small glassed in greenhouse to allow sunshine then cool it with the air conditioner? Still think it will be an electricity pig.

Here is a link that might be useful: Tundra Biome Climate


 o
RE: cooling element?

Hello, Im an engineer working for A/C manufacturing so I thought to put some thoughts to your idea without being overly technical

A Window A/C or what we call a DX unit would not work, the minimum discharge temperature would never go beyond 39F otherwise the compressor will burn out on high head. You might be able to achieve this with maybe (and maybe really) some old frost freezer, you will need to place them outside, however doing so you minimum temperature you would achieve will be around 23F (-5C). To reach the real sub-zero temp (beyond -10C, 14F) Im afraid you will need a chiller (VERY large unit, $1000/tons cooling, smallest machine is 25 tons, this is without considering electrical cost), to reach beyond -4F (-20C) you will need an ammonia unit (not allowed in residential, heath and safety concerns, same unit you will find in a hockey arena).

Hope this help


 o
RE: cooling element?

Maybe he doesn't need to actually expose the plants to the temperatures they might experience in their native habitat, only cold enough to induce dormancy. Maybe some might be happy in the fridge for a few months. As for snowcover, if the temperature never goes below, say -2C to -5c (28 to 23F), just a guesstimate, the plants likely wouldn't need snow for protection.

Of course all this is just a guess, an interesting project none the less.

Glen


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Northern Gardening Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here