Greenhouse heater size? calculation vs. table
Login
User Name
Password   


Registration is FREE. Click to become a member of OrchidBoard community
(You're NOT logged in)

menu menu

Sponsor
Donate Now
and become
Forum Supporter.

Greenhouse heater size? calculation vs. table
Many perks!
<...more...>


Sponsor
 

Google


Fauna Top Sites
LOG IN/REGISTER TO CLOSE THIS ADVERTISEMENT
  #11  
Old 08-14-2017, 07:25 PM
Subrosa's Avatar
Subrosa Subrosa is offline
Senior Member
 

Join Date: Jul 2013
Zone: 6b
Location: PA coal country
Posts: 3,157
Greenhouse heater size? calculation vs. table Male
Default

Quote:
Originally Posted by tropterrarium View Post
Big water body or having GH lowered into ground are certainly theoretical options. For underground pond or storage tank you would also need some sort of circulation system. Passive radiation is most likely too slow. Haven't seen any calculations for that.
For my purposes I plan to run a closed system with a heat exchanger submerged in the storage vessel circulating an antifreeze mix. When the circulation pump runs a powerhead of the type used for reef aquaria will move water through the heat exchanger in the tank. I really think that passively sitting the whole works above some 50 some degree water will prevent freezes in your situation. I do agree that to get any significant cooling you would need to actively move the heat around.
__________________
Be who you are and say what you think. Those who matter don't mind and those who mind don't matter.
Reply With Quote
  #12  
Old 08-15-2017, 10:49 AM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Member of:AOS
Location: Oak Island NC
Posts: 13,118
Greenhouse heater size? calculation vs. table Male
Default

Now that I live on 1/5 acre at the beach, I'll never get to do it, but I always wanted to replicate something I saw in an AOS bulletins years ago:


Some guy dug a 6' deep x 500 yard ditch in his yard. He laid in 18" diameter, unglazed, clay sewer pipe. One end opened into the greenhouse, the other into the open air above ground, protected by a small shelter and air filter. He ran exhaust fans 24/7, pulling air through that pipe into the greenhouse.

In winter, the dry, frigid air was warmed by the earth to the low-60's, so provided heat. Water in the soil permeated the porous pipe, so humidified the otherwise arid air.

In the summer, the hot, humid, outside air was cooled, which also served to drop out the excess moisture, to an absorbed by the clay and put into the soil.

Fantastic, reliable, climate control, at little cost.
__________________
Ray Barkalow, Orchid Iconoclast
FIRSTRAYS.COM
Reply With Quote
Post Thanks / Like - 2 Likes
Likes dounoharm, estación seca liked this post
  #13  
Old 08-15-2017, 11:03 AM
tropterrarium tropterrarium is offline
Senior Member
 

Join Date: Jul 2010
Location: Los Angeles
Posts: 553
Greenhouse heater size? calculation vs. table
Default

Thanks for this very detailed account. With plastic/metal barrels, I have no problem seeing the heat transfer. The build structure on top of pond/reservoir is where I see more issues, namely how radiation gets through a concrete floor.

Water tanks may be a stage two addition for me as well. Currently I have about 32 x 3' benches in the plan, the rest is hanging racks to the floor. I could put water tanks under those benches and even if not perfect, it should make some difference. I also plan on an internal koi & water lily pond, something like 6x6x3 feet. That's another descent amount of water. Still tossing around ideas ...
Reply With Quote
Post Thanks / Like - 1 Likes
Likes dounoharm liked this post
  #14  
Old 08-15-2017, 12:50 PM
Subrosa's Avatar
Subrosa Subrosa is offline
Senior Member
 

Join Date: Jul 2013
Zone: 6b
Location: PA coal country
Posts: 3,157
Greenhouse heater size? calculation vs. table Male
Default

Quote:
Originally Posted by tropterrarium View Post
Thanks for this very detailed account. With plastic/metal barrels, I have no problem seeing the heat transfer. The build structure on top of pond/reservoir is where I see more issues, namely how radiation gets through a concrete floor.

Water tanks may be a stage two addition for me as well. Currently I have about 32 x 3' benches in the plan, the rest is hanging racks to the floor. I could put water tanks under those benches and even if not perfect, it should make some difference. I also plan on an internal koi & water lily pond, something like 6x6x3 feet. That's another descent amount of water. Still tossing around ideas ...
I plan on a concrete slab 3' below grade with a block structure rising up to a bit above grade. The last course of block will be laid to accommodate 2x8" floor joists. The joists and the entire storage tank will be sealed with epoxy, and composite floor boards will be spaced to allow easy drainage into the tank beneath. An ornamental koi pond would certainly complicate things a bit.
__________________
Be who you are and say what you think. Those who matter don't mind and those who mind don't matter.
Reply With Quote
  #15  
Old 08-15-2017, 06:16 PM
dounoharm dounoharm is offline
Senior Member
 

Join Date: Nov 2008
Zone: 7a
Location: mid west usa
Posts: 3,381
Default

great ideas here.....I will love hearing how ray's 'ditch' method works.....ray's last ditch? lol...geo-thermal heating....
Reply With Quote
  #16  
Old 08-17-2017, 09:24 AM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Member of:AOS
Location: Oak Island NC
Posts: 13,118
Greenhouse heater size? calculation vs. table Male
Default

Quote:
Originally Posted by dounoharm View Post
great ideas here.....I will love hearing how ray's 'ditch' method works.....ray's last ditch? lol...geo-thermal heating....
It was neither my idea, nor will I ever try it. However, my next door neighbor in PA was looking into geothermal heating of his home, and the same 500 yards by 6 feed deep trench was one option, although the rocks (boulders) in our yards mandated that he drill wells instead.
__________________
Ray Barkalow, Orchid Iconoclast
FIRSTRAYS.COM
Reply With Quote
  #17  
Old 08-17-2017, 06:30 PM
dounoharm dounoharm is offline
Senior Member
 

Join Date: Nov 2008
Zone: 7a
Location: mid west usa
Posts: 3,381
Default

I always loved the old greenhouses/conservatories that used boilers....we had one that opened to the public at certain times....reynolda gardens....at times they have nice orchids, but in the past 20 years, it has sort of had a lack of maintainence....I learned a lot going thru there!
Reply With Quote
Reply

Bookmarks

Tags
btu, glass, greenhouse, output, sqft


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
greenhouse basics 101 smweaver Greenhouse Gardening 25 12-27-2009 11:06 AM
Greenhouse almost done Randy Greenhouse Gardening 1 07-23-2008 05:51 PM
southern Arizona greenhouse EdinAZ Greenhouse Gardening 7 06-03-2008 01:36 AM
Heater for Small Greenhouse HDCochran Greenhouse Gardening 7 02-17-2008 09:09 AM
Heater for Small Greenhouse HDCochran Advanced Discussion 17 01-03-2008 11:04 AM

All times are GMT -4. The time now is 10:36 AM.

© 2007 OrchidBoard.com
Search Engine Optimisation provided by DragonByte SEO v2.0.37 (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.

Clubs vBulletin Plugins by Drive Thru Online, Inc.