Geothermal

Mad Dog

Any suggestions as far as books, links, literature, experiences. I'm all ears....Mad Dog

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Gary Fereday

Geothermal?

The nine miners stuck under ground might have the best info on that!
1. 52*F is the temp of most of the underground (8 feet or more below the surface).Frost depths change the depth.
2. a wet underground will exchange more heat.
3. heat pumps are the most accepted way to exchange heat in geothermal systems. (except where high geothermal temperatures are used to provide heat for power or comfort [Iceland])
4. look at refrigeration systems and Heat pumps for more explicit information.
bigugh

don_9

geo

Mad Dog try this link www.fhp-mfg.com hope this helps.
Remember size for heat load,If size for cooling you will have to add heatstrips when you reach your second balance point.I have done both.also keep in mind what water distribution design to go with ground loop is a good setup
but you will loose some capacity.If you want more heat capacity then a pond or lake waterloop is the way to go.
And with any heatpump system proper air distribution is
the key to good performance. don

Alan R. Mercurio

Here's another

That may help in your quest for information.

http://www.waterfurnace.com/

Your friend in the industry,
Alan R. Mercurio
www.oiltechtalk.com

Mad Dog

Thanks fellers....

I'll start readin' Mad Dog

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Pete Millar (PM)

Best Geothermal Resource

Best book we've used is "ground source Heat Pumps, Design of Geothermal Systems for Commercial and Institutional Buildings" by Stephen Kavanaugh and Kevin Rafferty, works best for residential too. Good websites are www.oit.edu/~geoheat and www.bama.us.edu/~geocool. Enjoy... but don't cut corners!

Colin

Geo in SD

Mad dog we use millbrooke hydron module exclusivly and size to 70% of the heat load and 130% 0f the cooling load and make up the diffrence w/ electric resistance generally or gas or oil if a dual fuel application.

We usually have installed vertical bore ground loops and recomend to the customer they add one extra as it gives them better operating temps thus better efficiancy. check out www.hydronmodule.com or www.energy-dynamics.com
and tell them Colin sent ya.

The attachment is of a combo system off geo radiantlower level forced air main floor


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Mad Dog

you guys are fantastic!!!!!!!!!!!!!!!!!!!!!!!!!

Thank you! Now, for a little twist......customer would like to use existing two pipe steam system PIPING in conjunction with Geothermal - if possible. i.e., eliminate old steam boiler, remove radiator traps, et cetera. I know this would be very difficult, but is it IMPOSSIBLE????? Mad Dog

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J Matthers

Geo

MD, Ground source is what you are really talking about. I'm currently installing a water to water Hydron Module to supply radiant floor (with Warmboard) and Unico for AC. Ground source will work great with radiant because of the relitively low temp needed. My system will need temps no higher than 100F. The normal High temp produced by Ground sorce is 120F. To boost it to provide steam would require an additional heat sorce. This would negate any energy savings down the road. Some good sites to check out are:

http://www.igshpa.okstate.edu/
http://www.geoexchange.org/home.htm
www.oepheat.oit.edu

Good Luck

WJM

J Matthers

Re-read your post. You are just reusing the PIPE! Ya...

Colin

Mad Dog: Using the old piping and radiation wouldn't

be totally out of the question depening on how the radiator is configured. As long as the water doesn't speed along the bottom and not heat the cast. You must also be able to heat the structure at the low water temps mentioned above, you may need to find room for double the radiation. Also if you venture into this territory be sure to put wye strainers ahead of your pumps and heat pump, the old rust and particulate in the system could plug heat x changer or pump impellers.
Colin

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