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Re: GSHP and ice rink
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Posted by John on Wednesday, 12 August 2009, at 8:57 p.m.,
in response to GSHP and ice rink, posted by Tim
Tim,
Did you ever figure it out?
I am also interested in keeping a backyard rink frozen on days that are sunny or those with temperatures just above freezing.
In addition, I am actively pursuing replacing my 45 year-old boiler with a GSHP.
I'm not very knowledgeable on the subject but the limited reading I did suggested that GSHPs seem to operate on an "ideal" temperature change of 10 degrees F. (I think this is referred to as the "Delta T" between the entering water temperature and the leaving water temperature).
My questions would be:
1) Would a DX (copper loop) system be a better choice for removing heat from the rink at below freezing temperatures?
2) Would a permanent installation of an additional loop (beyond what would be required for heating the house) at a depth of 4" - 6" below grade be feasible? Reasonable?
3) Would a seasonal installation of a prefabricated piping system (such as Roll-Out-Rink) on top of the rink liner (laying on the ground) be compatible with a (non-RinkMate) GSHP?
4) The Ice Kube System water-to-water heat pump (according to their website) can produce fluid as low as 10 degrees F and as high as 145 degrees. Why can't Earthlinked, ClimateMaster or WaterFurnace produce a smaller temperature "range" of say 15 degrees F to 65 degrees?
5) How do I approach a GSHP installer/contractor without sounding like I am crazy?
My best guess is that the system would only need to run a couple of hours a day when air temperatures go above freezing in the middle of winter and perhaps 12 - 24 hours a day when trying to extend the skating season by a week or two at both ends of winter.
Any help would be appreciated.
Thanks.
-John
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