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Posted by Jeffrey Lebowski on February 16, 2008, 9:30 pm
> There are a large number of water heating HP's, most are marketed as pool
> heaters.
> Google should find a bunch...
> I'm not sure you'll find an Air to water heatpump that chills water...
> but if you do, let me know.
http://www.poolsaz.com/ProductDetails.asp?ProductCode=AE3000TR&click=1271
> Take care with water treatment chemicals & how the heat pump performs,
> although if they're built for
> chlorinated pool water, they'll probably handle anything your system will
> use.
> Have your engineer plot the wet bulb temps on a Psych Chart before you
cool
> your slab.
> Unless your in the dessert or high in the mountains you'll have a wet
> floor...
> I believe Dew Point was mentioned earlier.
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> get hot water for slab heating (say, 25C) in winter, and chilled water
> for dehumidication and slight slab chilling in the summer from an air
> source heat pump. The project is a small (10,000 sq.ft.) commercial
> building. We'd be best to size off of chilling capacity of 25 tons,
> which will require some supplemental heat (likely oil-fired boiler) as
> heating exceeds cooling in our climate. Anyway my problem is that the
> project's HVAC engineer has experience only with air source heat pumps
> that connect to air handling units and is a loss as to what to connect
> to generate heated/cooled water. I'd appreciate any direction.