Having looked into this in detail recently (I was thing the same thing) the frictional losses on the surface of the generator rotor are just too high compared to the magnetic fields that exist in the rotor air gap and you end up wasting all of your efficiency gains on CO2 friction on the rotor. It is like trying to run the rotor at high speed while it is surrounded by water.
On 2 December 2011 12:56, Horace Heffner <[email protected]> wrote: > Thanks to Jouni for a great reference! > > I don't see any reason CO2 turbomachinery in application with LENR could > not be sealed in a high pressure envelope involving no moving seals. The > transactions are heat in and out and electricity out. The generator would > have to be brushless, but that is no problem. > > > On Dec 2, 2011, at 12:03 AM, Robert Lynn wrote: > > CO2 turbomachinery is not scalable to less than perhaps a few hundred kW > due to the extremely high density of CO2 (100's of times air density), and > very expensive seals. In a distributed generation LENR world it will have > pretty limited applications; maybe aircraft, trucks, trains and ships, but > with Gas turbines so simple (no radiators required) and heat so cheap I > don't think you would bother with CO2. > > On 2 December 2011 00:17, Aussie Guy E-Cat <[email protected]>wrote: > >> Quote: "The Brayton cycle could yield 20 megawatts of electricity from a >> package with a volume as small as four cubic meters." Wow 1.6 x 1.6 x 1.6 >> mtrs for 20 Ac MWs at 46% thermal to electrical energy conversion! Another >> total game changer. The good news just keeps on happening. So much for 2012 >> being the end of the world. Baby it is just starting to come together. We >> are on steroids and moving at light speed into a new era of thermal and >> electrical energy production. Jouni thanks for that amazing link. You made >> my day. >> >> AG >> >> >> >> On 12/2/2011 10:22 AM, Jouni Valkonen wrote: >> >>> I am a great fan of this Cyclone engine. There is also similar >>> emergencing technology that uses super critical carbondioxide instead of >>> super critical water. The main benefit of going into super critical is that >>> the efficiency can go up to 46% for heat engine. And also with carbon >>> dioxide temperatures can be as low as 250-300 °C. >>> >>> *Supercritical Carbon Dioxide Brayton Cycle Turbines Promise Giant Leap >>> in Power Generation* >>> ScienceDaily (Mar. 4, 2011) — /Sandia National Laboratories researchers >>> are moving into the demonstration phase of a novel gas turbine system for >>> power generation, with the promise that thermal-to-electric conversion >>> efficiency will be increased to as much as 50 percent -- an improvement of >>> 50 percent for nuclear power stations equipped with steam turbines, or a 40 >>> percent improvement for simple gas turbines. The system is also very >>> compact, meaning that capital costs would be relatively low./ >>> >>> http://www.sciencedaily.com/**releases/2011/03/110304090459.**htm<http://www.sciencedaily.com/releases/2011/03/110304090459.htm> >>> >>> This water based Cyclone engine should be in every aspect (moving parts, >>> friction, noise, vibrations, efficiency, weight, pollution, and waste motor >>> oil) at least twice if not thrice as good as traditional internal >>> combustion engine. If someone would invent an internal combustion engine >>> today, it would be ridiculed as impossible, due to unsurpassing material >>> and engineering challenges. External combustion or electric engines are >>> just way too much simple and easy technologies compared to to internal >>> combustion engines. >>> >>> –Jouni >>> >> >> > > Best regards, > > Horace Heffner > http://www.mtaonline.net/~hheffner/ > > > > >
