Heat pump water heaters? [RE-wrenches]

[Darryl Thayer]

There are several heat pump water heaters; I have had
good results with both flordia and water furnace.  At
30 kBTU/hr is a 2.5 ton a common size for a well
constructed home heating system..  

Any X to liquid heat pump is a heat-pump water heater.
 In an industrial app where we needed 3000 gallons of
hot water a day at 160 F we used a Florida heat pump
(liquid to liquid, ground source) to heat the water
from about 45-60 F mains temperature to 120
intermediate water using off peak electric and then
finished to 160F with a Oil fired water heaters.  If
you are doing this use a easy flush pipe and valves to
allow flushing heating coil.  (When water is heated
the dissolved minerals are released on the hot
surface. (( particularly when using well water as a
source)) 

Years ago (about 40)I worked with a "steam pump" which
used water (steam) as a refrigerent, and compressed it
to increase the temperature.  I do not know if there
are any heatpumps that use other than freon as a
working fluid that could attain higher temperature. 
(freon breaks down at high temperature and limits the
working temperature of heatpumps. 

DT.   

--- Ken Schaal <ken at commonwealthsolar.com> wrote:
> Florida Heat Pump has DHW as well as 3-35 ton
> chillers.
> www.fhp-mfg.com
> 
> 
> --On Sunday, November 27, 2005 9:34 AM -0800 "Todd
> Cory, Mt. Shasta Energy
> Services" <toddcory at finestplanet.com> wrote:
> >
> > I have seen small scale heat pump water heaters,
> but has anyone seen any
> kind heat pump water heating machines that will
> crank out like 30K Btu's?
> 
> 
> I was researching this a few weeks ago and came
> across these commercial
> WaterFurnace units
>
<http://www.wfiglobal.com/VersatecWatertoWater3-30tons.asp>
> 
> No experience with them but we are considering for a
> project.



		
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