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Re: sterling engine plans

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Posted by J.P. on November 15, 2006, 12:30 am
 


Maybe you might try going to alt.binaries.e-book.technical and
download all of the headers and so a search and see what you come up
with... maybe an ebook of some sort...

Posted by Harry Chickpea on November 18, 2006, 1:13 am
 


Steam requires permits and boiler inspections, and for good reason.
If you don't have the expertise, don't screw with it.  Literally
thousands of engineers and firemen died in the last couple hundred
years because of steam, and they were usually fully trained.  Steam
can rip the skin off you or explode with enough force to propel a
water heater 500 yards.


Posted by Duane C. Johnson on November 18, 2006, 2:28 am
 Hi Harry;

Harry Chickpea wrote:

 > > Please, do you have any references to this small
 > > steam turbine? I really need a steam turbine that
 > > works well with steam input powers in the 2kW to
 > > 5kW range with shaft outputs up to 500W or so.

 > > Thanks!
 > > Duane

 > Steam requires permits and boiler inspections, and
 > for good reason.

I agree.

 > If you don't have the expertise, don't screw with it.
 > Literally thousands of engineers and firemen died in
 > the last couple hundred years because of steam, and
 > they were usually fully trained.

Yes, but most of these were with systems that have
large quantities of hot water at steam pressures
and temperatures.

 > Steam can rip the skin off you or explode with enough
 > force to propel a water heater 500 yards.

However with flash tube boilers that contain a couple
of cups of water at steam pressures and temperatures
the risks are greatly reduced.

In many jurisdictions the licensing requirements are
lessoned for these small flash tube boiler systems.

Duane

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Posted by Harbin Osteen on November 19, 2006, 12:17 am
 Howdy:
    You might do some research in the "Kalina Cycle" where you use
ammonia and water mix. This system has been used successfully using
the temperature difference between deep ocean water, and ocean surface
water, it's very efficient. The ammonia is "boiled" out of  the water to
turn a turbine, then in a condenser, it is reconstituted with the water, a
closed system.
    OTEC uses the temperature difference of ocean water on the surface
 and ocean water from the depths, a small difference of perhaps 25 degrees
Celsius, so I think that you might be able to build a system using a "Solar Pond"
to make power 24/7, but I have not figured out how large a heat sink, or pond
would be required per kilowatt. Of course there are other options besides the
pond.
    Below are some links you might want to check out on the "Kalina Cycle".

http://www.ocees.com/mainpages/Powersystems.html
http://www.ocees.com/mainpages/popupmovie.html
http://www.geothermie.de/gte/gte46/geothermal_power_plant.htm
http://www.rexresearch.com/kalina/kalina.htm
http://www.exergy.se/ftp/kalina.pdf
http://www.greenrock.com.au/ourBusiness/theTechnology.php
http://vganapathy.tripod.com/kalina.html
http://www.chpcenternw.org/NwChpDocs/ORC_and_Kalina_Analysis_and_experience.pdf
--

SeeYaa:) Harbin Osteen KG6URO

When American Citizens with dual citizenship pledges allegiance
to the flag, to which flag do they pledge allegiance too?

-


Posted by Duane C. Johnson on November 19, 2006, 3:03 am
 Hi Harbin;


 > You might do some research in the "Kalina Cycle"
 > where you use ammonia and water mix. This system
 > has been used successfully using the temperature
 > difference between deep ocean water, and ocean
 > surface water, it's very efficient.

Hardly.

 > The ammonia is "boiled" out of  the water to
 > turn a turbine, then in a condenser, it is
 > reconstituted with the water, a closed system.

 > OTEC uses the temperature difference of ocean water
 > on the surface and ocean water from the depths, a
 > small difference of perhaps 25 degrees Celsius,

A difference of 25C has a Carnot efficiency of about
8% and an ideal Kalina in the 4% range. And a
practical efficiency of 2% to 3%.

 > so I think that you might be able to build a system
 > using a "Solar Pond" to make power 24/7, but I have
 > not figured out how large a heat sink, or pond would
 > be required per kilowatt. Of course there are other
 > options besides the pond.

 > Below are some links you might want to check out on
 > the "Kalina Cycle".

 > http://www.ocees.com/mainpages/Powersystems.html
 > http://www.ocees.com/mainpages/popupmovie.html
 > http://www.geothermie.de/gte/gte46/geothermal_power_plant.htm
 > http://www.rexresearch.com/kalina/kalina.htm
 > http://www.exergy.se/ftp/kalina.pdf
 > http://www.greenrock.com.au/ourBusiness/theTechnology.php
 > http://vganapathy.tripod.com/kalina.html
 >
http://www.chpcenternw.org/NwChpDocs/ORC_and_Kalina_Analysis_and_experience.pdf

The Kalina cycle is interesting and may be useful in
OTEC, Ocean Thermal Energy Conversion, systems or as
a bottoming cycle for more conventional power plants.
However this cycle has not been shown useful in very
small solar systems with shaft outputs in the 500W to
1kW range.

The Kalina cycle is not well suited to low cost small
solar concentration systems which easily archive much
higher temperatures. These higher temperatures are well
suited to a Rankine cycle engine.

Duane

--
     Home of the $5 Solar Tracker      Receiver
    http://www.redrok.com/led3xassm.htm       [*]
   Powered by             \  \     \        //|
  Thermonuclear   Solar Energy from the Sun / |
Energy (the SUN)           \  \     \  /  /  |
Red Rock Energy             \  \     /   /   |
Duane C. Johnson   Designer  \  \  /  \ /    |
1825 Florence St  Heliostat,Control,& Mounts |
White Bear Lake, Minnesota    === \   / \    |
USA      55110-3364                ===   \   |
(651)426-4766        use Courier New Font \  |
redrok@redrok.com     (my email: address)  \ |
http://www.redrok.com   (Web site)          ===

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