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Wind turbine heat pump - Page 5

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Posted by markzoom on February 23, 2007, 7:38 pm
 

Very true, but at least it will stay outside if you switch the unit
off.
I was thinking of using stainless hydraulic pipe. If using propane/
butane the volume needed would'nt be a major cost factor.



Posted by Mike on February 21, 2007, 9:30 am
 

Great idea, the compressor from a small car eg Honda City is quite small and
driven via a pulley belt drive via a magnetic clutch arrangement so could be
engaged when the wind speed was sufficient to allow the system to start
without stalling.

New generation heatpumps employ a variable speed drive on the motor, so the
compressor never actually stops but just slows down, makes them more
efficient.

Now you have got me thinking...

Cheers
Mike (NZ)



Posted by markzoom on February 21, 2007, 2:00 pm
 
Sounds ideal then!


I've been doing some more thinking too...
I would be using it mainly for heating because here in the Azores I
need an extra 5C in the house in the winter, outside it never drops
below 10C at night (more like 14C+). The windiest days are usually the
coldest.
I could also use one to heat my water (after pre-heating with solar
water heater panels)
and keep it up to temperature overnight.

I think a vertical axis turbine/s would be the most convenient for
this application because:
A) They don't need the rotating refrigerant-pipe joints which a
horizontal axis one would need (unless they use a reciprocating rod
driving a compressor piston directly, which would be the neatest)
B) They are dead simple + cheap to make
C) It doesn't matter which direction the wind comes from
D) I can easily bolt an electric generator on too/instead, if I feel
like it.



Posted by Neon John on February 21, 2007, 4:21 pm
 On 20 Feb 2007 16:49:13 -0800, markzoom@digiverse.net wrote:


No, not unless designed for variable speeds and those are invariably
hermetically sealed brushless DC motor driven (or something equiv)


Yep.  Make electricity.  Drive an electric compressor.  Think of the
electronics as a mystical magical transmission that can convert the
unsuitable variable speed, variable power output of a wind turbine
into power suitable to drive a refrigeration pump.  Probably more
efficient than any sort of mechanical constant speed transmission
would be.

John
---
John De Armond
See my website for my current email address
http://www.neon-john.com
Cleveland, Occupied TN
Don't let your schooling interfere with your education-Mark Twain

Posted by markzoom on February 21, 2007, 8:13 pm
 
Apparently variable speed is not a problem with automotive heat
pumps.
That means all the extra generating crap to go wrong is unnecessary,
and I'll get more than twice the heat than the wattage rating of the
turbine.



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