[Gasification] More on ORCs -- food for thoughts

[Kevin Chisholm]

Dear Mr. Singfield
----- Original Message ----- 
From: "Peter Singfield" <snkm at btl.net>
To: <gasification at listserv.repp.org>
Sent: Friday, February 02, 2007 8:39 PM
Subject: Re: [Gasification] More on ORCs -- food for thoughts


...del...
>
> I well remember the arguments Kevin presented -- over and over -- that it
> could never happen because it simple can't work -- and his sending those
> "charts" proving it can;t work -- over and over.
>
As I recall, I sent a Butane Pressure-Enthalpy chart to the Gasification 
List, outlining the path followed by the Rankine Cycle when using an organic 
working fluid such as butane. You may not be familiar with the construction 
of such diagrams, and how they can be used as a design aid, and might have 
misinterperted what the chart says.

I don't ever recall saying that the ORC will not work. There is a long 
history of organic Rankine cycles that were a technical success.

Kevin



> I felt at the time that discouraged much interest in this then new and
> developing industry -- on the Gas list at least.
>
> I actually communicated with the Italian company referred to in this
> document you present -- way back when -- same time I contacted ORMAT (who
> even had a rep on this gas list for a short period!!)
>
> There is a major difference though between the operation you point out -- 
>
> "Bios BioenergieSysteme GmbH" (Austria)
>
> and the Italian company -- compared to ORMAT.
>
> ORMAT is the only one that offers power plants based on this kind of 
> system
> in the 3 to 6 kw range.
>
> I also have some ancient "notes" on these same kind of systems being built
> in Russia -- though have heard no further as of yet.
>
> Remember -- the ORMAT ORCs (and probably the others as well) preform at
> rated over all efficiencies with a heat source of but 350 F
>
> Ergo -- even with a simple solar collector -- they can be dual 
> fueled - -as
> in sun and biomass.
>
> Though this would hardly be practical for the large systems -- it
> definitely would be of interest to homeowners presently paying extended
> prices for conventional solar panel arrays these days.
>
> With that wonderful option of using any biomass -- rather than a diesel or
> other so fueled engine -- to charge battery when the sun don't shine.
>
> I have always believed that as a valid market niche to be pursued -- no
> matter what Mr. Kevin "believes"!!
>
> And certainly -- such an enterprise -- would greatly spur the sales of
> small thermal gasifiers -- those that are so handy and can work well even
> with 50% humidity fuel (no need for all that fuel conditioning) -- as tars
> in gas product just mean more fuel to heat the boiler.
>
> Well -- maybe in a few more years -- eh??
>
> There will be available 3 to 6 kw ORC units for a reasonable price.
>
> Hey -- most of those "stoves" (from the stove lost) developed over these
> past few years would be all that need be required.
>
> Now -- would not that be some spurring on for the "stovers" -- eh??
>
> Peter / Belize
>
>
>
>
>
>
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