Re: [pvusers] primer on efficient refrigeration

["Scott Willing" <willing@mb.sympatico.ca>]

Good luck. These devices are rated in terms of the temperature 
differential they can produce, i.e. "x degrees below ambient." I 
looked at them for possible use when car camping and concluded that I 
was better off with ice. Not that I'm suggesting ice for the home.

The most promising approach I've seen might be of interest to those 
with the time and chops to undertake a home construction project, a 
suitable location in the house, and cold winters. It takes advantage 
of the seasonally higher availability of solar power in summer, 
coinciding with greater need for cooling. It's basically a cold 
closet, using thermostatically-controlled venting to the outdoors in 
winter - essentially no power at all - and either a high-efficiency 
120VAC compressor, or, if the PV system has a suitable primary 
voltage, a 12VDC compressor kit such as the Danfoss-based Nova Kool. 
The latter is of particular interest to me as it means my modified 
square wave inverter, driving a conventional AC motor, wouldn't be an 
issue.

Others have reported good results and good bang for the buck with a 
high-efficiency freezer, rigged with a separate thermostat (since the 
in-built ones can't be adjusted high enough) to run at fridge 
temperatures.

All this said, I realize the original poster was probably looking for 
an off-the-shelf solution. Seems these days some mainstream brands 
are starting to look pretty good.

Cheers,
-=s

On 21 Aug 2002 at 14:15, Renewable News Network wrote:

> How much refrigeration are we talking?
> 
> For your comparison shopping
> I have a 36 watt 12vdc 1 gallon
> portable thermoelectric cooler
> w/vehicle cigarrette lighter adapter
> I'll be trying a 40 watt pv panel
> its a start let me know if you want
> the results.
> -ross@rnn.com
> 
> ps.
> 
> I size by guestimating from the
> number of window units required
> to cool the place(s)
> at 8-12,000 Btus per unit
> who needs engineers
> 
> encl:
> 
> On Mon, 19 Aug 2002, Jeffery Green wrote:
> 
> > Hi everyone,
> > Looking for a source this covers efficient refrigeration in lay
> > language and sources of comparison of the different refrigerators.
> > Jeff Green
> 
> 
> 
>      How hot is it?
> 
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