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Re: geothermal heating/radiant flooring/domestic hot water
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Posted by Phil on Saturday, 3 May 2008, at 11:41 p.m.,
in response to Re: geothermal heating/radiant flooring/domestic hot water, posted by Robert Gammon
Don't use one poor example to disprove a concept.
Just beacuse some climates "can" use evaporative chillers, doesn't mean that those that can't shouldn't use GSHP's as chillers.
BTW, in a recent post you said that I installed my W-A geothermal unit because I wanted to use evaporative cooling but it wouldn't work in this climate... I don't know where you got that, but after growing up with evaporative coolers in Australia I would NEVER consider one for my home.
When I was researching my own design, many GSHP manufacturers proposed using a W-W GSHP to generate either hot or cold water and then distribute the water to "point of use" air coils for zone conditioning. If two tanks are used to store hot and cold water sepparately, you can deliver heat in one one zone and cool another zone simultaniously if you size the unit correctly. The GSHP just has to reverse cycle to choose one tank or the other.
As we all know, water has MUCH better thermal capacity than air, so it's easier to transfer a LOT of cool to the other side of your house using water pipes rather than air ducts. Not necessary for my low demand home, but if you were building a 4000 Sq home with 5T cooling needs, you might consider it :)
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An exercise in Energy Smart, Not So Big living. www.OurCoolHouse.com - Ideas @OurCoolHouse.com
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This site is all about building a cool, energy efficient house, that makes maximum use of earth sheltered design, passive solar heating and cooling, geothermal exchange energy management, and right sizing of the house for it's designated use. The home's placement is on a south-facing hillside in Deep Creek Lake, Maryland. This site describes the design process, the technologies used and the expected results. We also have a comprehensive Links Page for anyone who is also interested in designing a similar project.