[stian1979]

Originally Posted by hightower99

What??? I don't think so they guzzeled gas and oil like crazy for thier power output! The super large diesel I am talking about can reach 50% thermal efficiency!

They are actualy betwen 50-55% nowdays.

[quote=hightower99
Why is everybody still thinking about Stirlings and ceramic composites??? really people those are the old guesses at how to solve the heat problem but I know of a much better solution. A no-loss water injection system! inject water just as ignition is starting and most of the heat will be transformed into greater pressure, then you can have a lighter block and no radiators. (I hope everybody realises that it is not the heat but the pressure that makes things go round)[/QUOTE]

Water injection prove to giwe lover emisions but only 5-15% will give a power increase since more than that only will cool down the gasses to mutch and you will not have a power loss instead. Heat don't make things go around? Do you know that if air dubble it's temperature it will grow to 5 times the volum? This means that preshure will increase if the air has nowhere ti exspand.

Originally Posted by hightower99

about the revetec vibrating too much, stian1979: the revetec can be made so that the pistons move just like in a normal boxer! (without all the side loading of course!)

Yes it can, but now it's geting more heavy again

Originally Posted by hightower99

A good engine will combust more than 80% of the fuel in the cylinder before 20 deg ATDC the remaining power from the remaining gas is not enough to keep the pressure high through the expansion phase!(in other words the remaining gas doesn't add any power it simply slows the loss) Most conventional crank engines reach maxium conversion efficiency at around 60deg not 90deg like you think they do.

Diesel don't and this will probartly be the engine that will be more and more dominat because it don't bother that mutch about fuel qualety. You can runn it on LNG or asfalt(if you heat it up to 170C) Why do you thing big diesels at 10MW ++ has long stroke? Lots of rasons, but one of the is that it gets time to burn things that normal engines would not be able to combust.

Originally Posted by hightower99

this is about as missled as I care to read. the 30% efficiency you are talking about in a normal engine is the thermal energy. (as in theretical total energy of fuel used divided by the output energy) the revetec is 3 times more mechanically efficient not thermally! you are relating numbers and doing top of the head math that shouldn't be! Both the revetec and a normal engine have the same amount of waste heat!

Yeah right. I would like to see a engine provide "3" times the torque at the same fuel consumption, same outer crank diameter and same heat loss. If they say a 5% or even 20% Increase due to bether transfere of forces I could buy it, but 3 times no. Sorry hightower.Scotch Yoke kan do the same just as good.

Originally Posted by Matra et Alpine

stian -- you are wrong. The evidence has been presented. My parting comment to you .... learn about the difference between peak and average and you would understand the Stirling/Hybrid and realise the HUGE mistake The rest of it ?? .... listen to ht

I know about all this mathers so I dear to say you are wrong. You have ben reading to mutch on revetec.com and svoloved the bait with the hock, line and maybe even the fisher. Try to make this engine yourself and runn it in MSC Adams. You still think your the tecnical Albert Einstein so why are no one running Hybrid Stirlings now? Do you belive in conspiracy to keep oil consumtion up and oil price up? If Stirling was so perfect as you try to make it seam every one would have a stirling hybrid in there model programe now.

If your only going to start it up and drive normaly to work it will probartly work just fine, but if you got to brake down to a dear crosing the road after only 30 secs of driving and then acelerate again the stirling would stil strugle to take load and the batterys would be empthy. It's not every day driving My consern is, but things that hapend that you did not exspect in the first place. This could be solved by using the electric motor as a generator to brake the weel's and runn the power to bateries by excitation of the motors, but now costs and system compeksety rise.

So strange the car industri don't jump on to your ideas of perfect engines and sulutions if they are so great.

Originally Posted by hightower99

this is what happened in the past. I believe that with a synthetic oil and better ring seal technology (it exists it just has to be used) that oil and water can be kept seperate for the most part and that when they do meet that they do not produce nasty compounds. I don't know of anyone looking into it right now, but I plan to try some test systems out on a turbo diesel. (When I turn the key what will happen?)

also I am talking about water injection as an entire cooling system not a intercooler or whatever.

also a good note that with water injection cooling with a no-loss system (as in you don't need to keep filling up on water) then efficiency can be raised very high as it is theretically possible to have exaust temperatures that are lower than intake after turbocharging temperatures. (a theretical but believeable example would be exaust temp of 20deg C and a intake after turbocharging temp of 300deg ((no intercooler)))

Like I say befour in this post it's limited how mutch you can spray in of water. If you increase preshure water will avaporate at a higher temperature. 60bar preshure is enough to keep water from not boiling even at 200C++

Also it has some other effects. H2O+Fe=? and heat make it go faster. And if it get out of the cylinder into the engine you have something called hydrocarbons or oil. H2O + hydro carbons can make organic acid's and I would not like that in my engine. Ceramics are interesting. No cooling neaded and you can wrap in the engine with insulation and water will not be a ishue if cylinder components are made from material that don't rust.