[Digestion] Biogas for milk cooling centres in Central Uganda

[Art Krenzel]

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&fid=1&mid=069dc4c6-3049-11e3-a4d7-00237de46188&fv=1#n=14993950&fid=2&mid=dec4048c-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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