[Digestion] Digestion Digest, Vol 5, Issue 14

[stan simon]

I agree that summertime cooling with absorption cycle chillers would be an 
option.

As a side note, it would be interesting to review the economics of using 
some of the cooling  in the dairy to offset the loss of milk production due 
to high temperatures in summer months.  The drop in production is severe in 
some cases.  Cows don't lactate as well when they are stressed by heat. 
They other use that seems obvious is the milk refrigeration.  Yazaki is 
marketing absorption chillers is smaller sizes.

There was an article in Hoard's Dairyman about 10- years  ago concerning the 
cooling of  diary barns.  Probably more since then if anyone is interested.

Stan L Simon, P.E.
S. L. Simon Engineering P.A.
8060 160th Av NE
Kerkhoven, MN 56252
320-264-5354 Phone/Fax
320-894-1117  Cell
slsimon at tds.net




----- Original Message ----- 
From: <digestion-request at listserv.repp.org>
To: <digestion at listserv.repp.org>
Sent: Thursday, November 16, 2006 12:00 PM
Subject: Digestion Digest, Vol 5, Issue 14


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> Today's Topics:
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>   1. flex-use biogas plant? (Jason Perry)
>   2. Re: flex-use biogas plant? (Lu?s Ferreira)
>   3. flex-use bio gas plant (mylesacc at comcast.net)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 16 Nov 2006 11:47:50 +0000
> From: Jason Perry <perry.jason at gmail.com>
> Subject: [Digestion] flex-use biogas plant?
> To: digestion at listserv.repp.org
> Message-ID: <455C4FE6.5000606 at gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi all,
>
> This is more of a question about energy recovery from biogas than about
> digestion itself. This is also a semi-hypothetical situation. Let's say
> you have a school in New York State that has multiple dairy farms within
> 3 miles. Peak natural gas use for heating the school is in
> January/February; gas use drops to almost nothing in the summer. In
> theory, if all of the dairy manure were recovered and brought to a
> central digester near the school, the biogas produced could more than
> cover the peak heating demand.
>
> But what to do with surplus biogas for the rest of the year? Generate
> net-metered electricity, of course.
>
> Does such a system exist, where biogas is diverted from one energy use
> to another (or some combination in between) depending on need?
>
> Thanks for any thoughts,
>
> Jason
>
>
>
> ------------------------------
>
> Message: 2
> Date: Thu, 16 Nov 2006 14:43:27 -0000
> From: Lu?s Ferreira <lferreira at isa.utl.pt>
> Subject: Re: [Digestion] flex-use biogas plant?
> To: "Jason Perry" <perry.jason at gmail.com>
> Cc: digestion at listserv.repp.org
> Message-ID: <002201c7098d$a5e38aa0$550b11ac at isa.utl.pt>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Hi Jason,
>
> Just an idea! Why not to use the surplus of heat from the biogas 
> conversion,
> for district cooling during the summer.
>
> Luis
>
>
>
> ----- Original Message ----- 
> From: "Jason Perry" <perry.jason at gmail.com>
> To: <digestion at listserv.repp.org>
> Sent: Thursday, November 16, 2006 11:47 AM
> Subject: [Digestion] flex-use biogas plant?
>
>
>> Hi all,
>>
>> This is more of a question about energy recovery from biogas than about
>> digestion itself. This is also a semi-hypothetical situation. Let's say
>> you have a school in New York State that has multiple dairy farms within
>> 3 miles. Peak natural gas use for heating the school is in
>> January/February; gas use drops to almost nothing in the summer. In
>> theory, if all of the dairy manure were recovered and brought to a
>> central digester near the school, the biogas produced could more than
>> cover the peak heating demand.
>>
>> But what to do with surplus biogas for the rest of the year? Generate
>> net-metered electricity, of course.
>>
>> Does such a system exist, where biogas is diverted from one energy use
>> to another (or some combination in between) depending on need?
>>
>> Thanks for any thoughts,
>>
>> Jason
>>
>> _______________________________________________
>> Digestion mailing list
>> Digestion at listserv.repp.org
>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Thu, 16 Nov 2006 15:00:29 +0000
> From: mylesacc at comcast.net
> Subject: [Digestion] flex-use bio gas plant
> To: digestion at listserv.repp.org
> Message-ID:
> <111620061500.5643.455C7D0C000F2ADD0000160B22135753330C0C0E9C0A049703 at comcast.net>
>
> Content-Type: text/plain
>
> Jason,
>
> I have worked with a company New Energy Solutions Inc (www.nesi.biz) they 
> have a method of converting ADG from dairy manure into pipeline quality 
> natural gas, which also can be compressed for CNG vehicles. NESI also can 
> produce ultra-pure hydrogen from the digester gas. NESI has a beta site on 
> a dairy farm near Cornell Univ.
>
> Peter Z
>
> ------------------------------
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> End of Digestion Digest, Vol 5, Issue 14
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>