Power Producing Engine # General Public Comments

[jrolland]

Greetings All,
Certanium is a company that sells all types of welding materials including support for welding operations. One of these is called "Heat Shield". I have some at home and have seen it work. It is marvelous stuff! Heat shield handles like plumber's putty, but is a bit thinner in consistency. The company rep. demonstrates it by taking a thin piece of steel, about 2" x 3" x 1/16". He rolls some of this putty into a cigarette-diameter cylindrical mass and puts it across the middle of the steel (the long middle). He then handed the metal to my partner and told him to drop it when it got too hot to hold. He lit a welding torch and heated the other end of the steel until it was nearly yellow! My partner never dropped it! The rep. later scraped what he had used in the demo back into the tub of new heat shield. It's reusable, too! My thought is that this material could be used to stop the heat transfer between the hot and cold sides of the heat exchanger cylinder (and possibly piston) and thus improve engine performance by isolating the sections. Certanium Company has only one website that I've found. It's www.certanium.fi. It's not in English, but the picture on the main page says it all. Certanium products are very easy to find at just about any welding supply shop.

Best regards,
Joff

[jrolland]

Hello Gerry,
I surfed around a bit and found this really neat page that describes in a fair amount of detail how shuttle tiles are made.
http://science.ksc.nasa.gov/shuttle/tec ... l#sts-hrsi
Best regards,
Joff

[gerry]

Interesting Jeff - I will give it a try this evening

Regards
Gerry

[jbondy]

Anyone who is interested in high temperature ceramics should look at www.cotronics.com. They offer both solid ceramic stock, castable ceramics, and ceramic adhesives.

Jon Bondy, jbondy@sover.net

[chas]

I have seen some projectes using a mechanism free Stirling engine pump, ie the "pistons" are purely the water surfaces. The only moving parts were the two non return valves, one input , the otherput. This would make an ideal garden pond pump. I have some plans but no detaills on how to calculate the volumes, lengths or other dimensions. It did mention that these are critical as they need to set up a resonance.

Charles Whitehead
chas@ocea.es

[labrat_7]

For a high temperature insulator between the hot and cold ends of the displacer cylinder you might want to look at a carbon cloth construct. That's what they use in rocket motor nozzles. The nozzles on the Space Shuttle Boosters take about 8000 deg.F for 2 minutes at an operating thrust of about 3 million lbs thrust. The nozzle on the RS-68 liquid fueled rocket is also made of carbon cloth and it's the largest liquid rocket motor in production.

[piolenc]

I'm curious about the status of this project. There are no new posts since 2003. Does that mean it's dead (and if so, why?) or simply that the project entered a new phase and comments were no longer posted?

[cosmetex85]

I see the discussion pertaining to high-heat resistant ceramic. My company produces for the dental industry a refractory heat resistant material(powder& liquid) that one mixes and can pour into molds,etc. This is a very precise,dense material. See: cosmetex-allceramics.com

[bptdude___2569]

Specifically commenting on Al Stern's idea of his medical ceramic, capable of forming into molds and having high heat resistance:

This is interesting stuff you play with. It may need to be the inside coating of a metal container, for strength, but its heat resistance would lengthen the lifespan of the metal from heat fatigue.

To the project suggestion box:

Such liquid, and liquid to hard, ceramic with high heat resistance could be very helpful to solve metal heat issues, and may be used in a mix of liquid and hard molded states.

This would allow hollow metal rings, with vacuum to be inserted as thermal barriers, to be placed inside moldings. This would also allow easy fitting and housings to be made, so the hot end could be inserted and removed easily into a heat source, such as a furnace or adapted to some waste heat source.

[utopianwebsurfer]

Subject: thermo dynamic efficiency applications 7/20/08



##### Forwarded Message #####
the whole idea of using permanently stored heat in the form of supercompressed
air which will give off heat for long periods of time while under thousands of
psi pressure and using supercool temperature from
stored liquid nitrogen, is because both sources will give off predictable
amounts of both hot and cold temperatures that will start and run the Stirling
engine for vast periods of time at a specific rpm rate, which should generate
huge amounts of electricity when spinning a magnetic armature from the spin of
the engine inside of a coil of electricity generating coils. the yield of
electricity should be greater than the sum of expended energy it took to
compress and store the air and compress & store the liquid nitrogen, which
should give off heat energy and cooling energy 4
vast periods of time. you can add to that effect by recirculating as u
mentioned.whats your opinion?am i being too technical or grammatically
incorrect?this is just my way of doing things.

also did u know that if u get a 24 oz can of beer containing 8.1%
alcohol by volume and shake the unopened can, then in just a few seconds to
half a minute the aluminum skin of the can of beer will
get ice cold in just a few seconds?! its true! try it! your hand will actually
start to get numb with the cold in under 2 minutes!

just use the vibration of the engine to shake & vibrate the can in order to
cool the cooled part of the engine thru the aluminum skin
of the can to keep that part cooled which will be self perpetuating
as long as the can is kept vibrating from the vibrations of the engine! then if
necessary use supercompressed air which will produce
large amounts of heat for long periods of time when pressurized under thousands
of lbs. psi.
the metal/skin of the tank or the fiberglass skin of the tank holding the air
under thousands of lbs. p.s.i. will exude large amounts of heat from the
supercompressed air like a diesel engine of compressed air for long long
periods of time while under extreme
compression! use the heat of the compressed air to power the heated side of
your Stirling engine.doing this will produce long periods of run time for your
Stirling engine if u capture the correct dynamic of hot to cold temperature
ratio.

thanxz 4 your time - utopian
websurfer 7/19/08