[Gasification] More on ORCs -- food for thoughts

[Monte Carlo]

Ormat does some larger projects too. I toured this plant on its opening last year. I have a whole bunch of photos of it if anyone's interested.

http://www.aps.com/images/PDF/renewable/SP017SaguaroSolarTrough.pdf


Ted




----- Original Message ----
From: Peter Singfield <snkm at btl.net>
To: gasification at listserv.repp.org
Sent: Friday, February 2, 2007 4:37:53 PM
Subject: [Gasification] More on ORCs -- food for thoughts


Every now and then ORCs come to plague us at this list -- and many wonder
-- why even bother??

Well -- one picture can sometimes save 1000's of words -- and I just found
such.

Years back I did an extensive research on "ORCs" -- as many on this list
can attest to. 

The people -- the company -- that in my opinion have advanced this field of
endevor more than any other os: "ORMAT"


The picture I wish all with interest to pursue is found at:

http://www.offshore-technology.com/contractors/power/ormat/ormat1.html

However -- this is from my old Hard Drive archives -- and that url may no
longer be functional.

In such case -- I could email this graphic to Tom for mounting -- along
with this "article" 

Also -- the home page for ORMAT shoul;d still work -- and it is:

http://www.ormat.com/

Why should gasification be concerned with ORC technology??

well -- of you do get the chance to look at this graphic -- simple think of
a thermal gasifier "product" replacing the natural gas uses in this example
shown -- to fire the boiler.

Now -- it is a releatively easy "work" to tune a biomass gasifier to make a
cimbustible gas and produce "chat" (charcoal) --

The charcoal can then be used in portable gasifier applications -- as it
requires much less gas cleaning equipments.

The gas from the stationary gasifier could be use directly to heat the
boiler in this ORMAT ORC example -- not need of any clean-up -- plus -- one
gets higher efficiencies -- as the product gas need not be cooled -- so
ambient heat is used to produce more power.

I have appended the text from this old WWW site below.

These style of ORC power systems are hermetically sealed -- require no
maintenance -- and last 25 years or more!!

Though theoretically one could do this same with "steam" -- it would be at
a much greater cost -- you would require a "liscenced" operator present at
all times -- and it would be maintenance intensive.

To me -- marrying an ORMAT ORC to a biomass thermal gasofier with a by
product of charcoal is the ultimate solution.

In my "direct" discussions with ORMAT many years ago -- they pointed out
that though their present prices are expesnive -- if they had an order for
even but 10,000 such units -- prices would then after be dramatically reduced.

For now -- and "insitution" that wishes to proto-type such an area of
endevor can simply pay the fair prioe and get started in no time making power.

The schematic I refer to makes this entire concept very clear if on just
but glances at it.

It is just like a home refrigeration compressor -- with a DC generator
rather than an electric motor -- and what appears to be a pleton wheel
turbine rather than a compressor -- all incased in the same kind oif
familiar refrigerator compressor "can"

You have a hot side and a cold side -- but it all works in reverse.

Peter/Belize

********************appended**************

http://www.ormat.com/technology_2.htm

Remote Power Units 
Time, the only true test of reliability

The ORMAT® Energy Converter (OEC), a Closed Cycle Vapor Turbogenerator
(CCVT), is a fully integrated and tested power system developed for remote
applications. Basically a self-contained power package--consisting of a
combustion system, a vapor generator, a turboalternator, an air cooled
condenser, a rectifier, alarms, and controls housed in a shelter--it will
supply 200 to 3000 Watts of filtered DC power on a continuous 24 hour per
day basis for over 25 years with virtually no maintenance or repairs.

The ORMAT concept utilizes a hermetically sealed organic Rankine cycle
generating set which contains only one smoothly rotating part--the shaft on
which the turbine wheel brushless alternator rotor are mounted. The
turboalternator shaft is supported by working fluid film bearings which
eliminate any metal-to-metal contact, resulting in years of trouble-free
operation.

One of its most original features is that it can be run with different heat
sources, since the fluid cycle is closed and requires only the application
of external heat; almost any heat source may be used: natural gas,
liquified petroleum gas, kerosene, jet fuel, and diesel fuel.

For more details, see: 
http://www.offshore-technology.com/contractors/power/ormat/index.html




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