[Digestion] Biogas for milk cooling centres in Central Uganda

[Tom Miles]

Art,

 

That link seems to require a Microsoft account. Is there an alternative url?

 

Thanks

 

Tom

 

 

From: Digestion [mailto:digestion-bounces at lists.bioenergylists.org] On
Behalf Of Art Krenzel
Sent: Tuesday, October 08, 2013 12:28 PM
To: david at h4c.org; For Discussion of Anaerobic Digestion
Subject: Re: [Digestion] Biogas for milk cooling centres in Central Uganda

 

Stephen:
 
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.
 
https://bay169.mail.live.com/default.aspx?n=77550718
<https://bay169.mail.live.com/default.aspx?n=77550718&fid=1&mid=069dc4c6-304
9-11e3-a4d7-00237de46188&fv=1#n=14993950&fid=2&mid=dec4048c-3030-11e3-b579-0
0237de3f534&fv=1>
&fid=1&mid=069dc4c6-3049-11e3-a4d7-00237de46188&fv=1#n=14993950&fid=2&mid=de
c4048c-3030-11e3-b579-00237de3f534&fv=1
 
The Sevel sized refrigerators are quite small for most commercial milk
applications.

Art Krenzel, P.E.
PHOENIX TECHNOLOGIES
10505 NE 285th Street
Battle Ground, WA 98604



 

  _____  

Date: Tue, 8 Oct 2013 09:46:00 -0700
From: david at h4c.org
To: digestion at lists.bioenergylists.org
Subject: Re: [Digestion] Biogas for milk cooling centres in Central Uganda



Stephen,



On 10/8/2013 2:37 AM, Stephen Etheridge wrote:

Why not use a gas fridge?


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.

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.)



d.

-- 

David William House

"The Complete Biogas Handbook" www.completebiogas.com
Vahid Biogas, an alternative energy consultancy www.vahidbiogas.com

"Make no search for water.       But find thirst,
And water from the very ground will burst." 

(Rumi, a Persian mystic poet, quoted in Delight of Hearts, p. 77) 

http://bahai.us/


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