Originally Posted by
IngevaldThanks for offering to post the progress of your project. I am very interested in seeing the various steps you are taking, solutions for complexities found along the way, etc. The solar geothermal concept is a very efficient way to heat and cool a larger greenhouse, eliminating a large amount of energy that would normally be needed to keep the system working.
I wrote about my first hand observation of Ivan's greenhouse several years ago. You can read about it here in this link
http://forums.gardenweb.com/forums/load/fig/msg1001172116981.html Technical information can be found here
http://www.sunnyjohn.com/indexpages/shcs.htm There is a lot to wade through on this site, but worth the time if you are considering this design.
I discovered another interesting geothermal system for greenhouses that might be worth some study. Russ Finch in Alliance, NE has devised a system that is similar to the system above and has successfully been in use for many years. There are some differences and am leaning towards towards the set up that Ivan uses at the moment.
Please keep us (or me) posted on your solar geothermal greenhouse project.
Ingevald