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<body class='hmmessage'><div dir='ltr'>Stephen:<BR> <BR>Take a look at this company who produces a modern commercial sized thermal refrigerator system. This unit may be too large for your application but it is easier to downsize a design than upsize.<BR> <BR><a href="https://bay169.mail.live.com/default.aspx?n=77550718&fid=1&mid=069dc4c6-3049-11e3-a4d7-00237de46188&fv=1#n=14993950&fid=2&mid=dec4048c-3030-11e3-b579-00237de3f534&fv=1">https://bay169.mail.live.com/default.aspx?n=77550718&fid=1&mid=069dc4c6-3049-11e3-a4d7-00237de46188&fv=1#n=14993950&fid=2&mid=dec4048c-3030-11e3-b579-00237de3f534&fv=1</a><BR> <BR>The Sevel sized refrigerators are quite small for most commercial milk applications.<br><br>Art Krenzel, P.E.<br>PHOENIX TECHNOLOGIES<br>10505 NE 285th Street<br>Battle Ground, WA 98604<br><br><br><br> <BR><BR><div><hr id="stopSpelling">Date: Tue, 8 Oct 2013 09:46:00 -0700<br>From: david@h4c.org<br>To: digestion@lists.bioenergylists.org<br>Subject: Re: [Digestion] Biogas for milk cooling centres in Central Uganda<br><br>
<br>
<br>
Stephen,<br>
<br>
<br>
<div class="ecxmoz-cite-prefix">On 10/8/2013 2:37 AM, Stephen Etheridge
wrote:<br>
</div>
<blockquote cite="mid:009701cec409$fece8460$fc6b8d20$@biotrix.asia">
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<p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Why
not use a gas fridge?</span></p>
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</blockquote>
<br>
One's mileage may vary, but gas refrigerators (here in the US, such
as the old Servels) have very poor efficiency (3%?), and generally
speaking, where enough biogas is available, it makes better sense to
make electricity, use the excess heat for the digester, and use
electric-powered cooling.<br>
<br>
I don't know if larger cooling systems would experience
significantly better efficiency: indeed, I don't know that I have
ever seen mention of a larger system, which may provide something of
an inferential answer. (By the way, Einstein held a patent on a
gas-powered refrigeration system.)<br>
<br>
<br>
<br>
d.<br>
<div class="ecxmoz-signature">-- <br>
<div><span style="font-size: 110%;">David
William House<br>
</span>
<div style="padding-left: 3em; font-size: 80%;">"The Complete
Biogas Handbook" <code><a href="http://www.completebiogas.com" target="_blank">www.completebiogas.com</a></code><br>
<em>Vahid Biogas</em>, an alternative energy consultancy <code><a href="http://www.vahidbiogas.com" target="_blank">www.vahidbiogas.com</a><br>
<br>
</code></div>
<code>
<div style="padding-left: 2em;">"Make no search for water.
But find thirst,<br>
And water from the very ground will burst."
<div style="padding-left: 2em; font-size: 80%;">(Rumi, a
Persian mystic poet, quoted in <em>Delight of Hearts</em>,
p. 77) <br>
<br>
<a class="ecxmoz-txt-link-freetext" href="http://bahai.us/" target="_blank">http://bahai.us/</a></div>
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