Wally: Good info, thanks.

Fred

-----Original Message-----
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Wally
Bryant
Sent: Monday, February 18, 2013 1:39 PM
To: cnc-list@cnc-list.com
Subject: Re: Stus-List refrigeration - icemaker?

Fred - I too have a thermostatic controlled spillover fan, but that's a
different animal.

I have two of those circulation fans in pipes -- one in the fridge, one in
the freezer.  It moves air around inside each box, pulling the cold air from
the bottom and shoving it out the top. It helps to keep the entire box at a
constant temperature.  When my fan failed, I noticed that the compressor was
cycling much more often because the thermostat 
was just sensing the temp in one spot.   By circulating the air, the 
compressor doesn't turn on until the entire box is warm, and doesn't turn
off until the entire box is cold.  The compressor cycles less often.  I
understand that the biggest power drain for a compressor is when it turns
on, and it's more efficient to run a compressor at low RPMs for a long time,
rather than at high RPMs and cycling constantly.

Speaking of which, another big power saver for me is the 'Smart Speed
Controller' that works with most Danfoss compressors.  It automatically
adjusts compressor speed for maximum efficiency. Most of the time my
compressor runs at 2000 rpm (slowly) but if I load up the freezer with
unfrozen meats, or when the summer sun is blasting down on that side of 
the hull, it will speed the compressor up.   Again, it's more efficient 
to run the compressor at slow speed for longer times than it is to cycle it
constantly at higher speeds.
See: <http://www.coastalcoolaids.com/allproducts/speedcontrollers.html>

Wal


Fred Hazzard wrote:
> Wally:
>
> Please write a little more about what I could gain by having a fan.   I
have
> a thermostatically controlled set of louvered doors between the refer 
> and freezer.  <snip>


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