Re: [Vo]:Electric generator configuration described [Copy 2]
On Tue, Jul 5, 2011 at 10:27 PM, Jed Rothwell jedrothw...@gmail.com wrote: They said it was a different liquid. They did not actually identify the medium: Re: Cooling Hyperion with liquid salts Defkalion GT Posted: Tue Jul 05, 2011 2:46 pm Joined: Fri Jun 24, 2011 6:56 am Posts: 121 Answering to a question on testing with coolants other than glycole, we stated that we do lab tests with melting salts that boil in temperatures at the range of 1000C. The maximum temperature we have achieved in safe for Hyperions results to 414C output in the secondary circuit. We have to run such tests for two reasons: 1. To test Hyperion materials and devices performance in off limits conditions 2. To experiment with materials or coolants that seem interesting for our developments on more demanding applications. Sodium chloride was not our choice for the above purposes. There are other interesting coolants in this rather big category which suite better to our products specs. We will announce our results on such coolants when all of our tests conclude to adapt certain of them in our products alternative cooling methods. Thank you for your comment end
[Vo]:Electric generator configuration described [Copy 2]
Let me summarize some things here regarding electric power generation with the Defkalion reactors. This information is scattered around. Some is from my memory. Defkalion has made a number of comments in the White Paper and on their forum regarding the prospects for electric power generation. They have been testing their reactors with several small generators. I think their plan is to certify the reactors will work with several brands, and then have the customer or OEM supply the generator separately. In other words Defkalion will not manufacture electric generators. A wise decision; they have enough on their plate already. They mentioned several specific brands and types of small generators they have tested, but I can't find those specifics at the moment. In all reactors, they use a primary loop with one liquid that stays in liquid phase, and a heat exchanger for the working liquid or gas to be heated. With glycol the maximum temperature they can reach is 190°C. Carnot efficiency is not very good at that temperature, so my guess is that these reactors will be used primarily for heating, including process steam. They have tested other liquids for higher temperature applications. I don't know what these other liquids are, but one of them reaches 414°C. This is considerably hotter than the primary loop in most fission reactors. Carnot efficiency is fine at this temperature. The said the lowest input to output ratio they have observed is 1:19. I think 1:30 is what they usually achieve, but don't hold me to that. They achieve these ratios every time, on demand. It takes about 4 minutes for the reactors to go to maximum power. It is clear that with these temperatures, input to output ratios, and speed, generating electricity efficiently and making the thing fully self-sustaining will be a trivial problem. It is only a matter of engineering as physicists say. - Jed
Re: [Vo]:Electric generator configuration described [Copy 2]
I only found this substance with a boiling point of 414C: http://msds.chem.ox.ac.uk/TR/tris(2-ethylhexyl)trimellitate.html http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=18725 Synonyms: 1,2,4-benzenetricarboxylic acid tris(2-ethylhexyl) ester, trioctyl trimellitate, tri-2-ethylhexyl trimellitate, TOTM, Hatcol 200, Kodaflex TOTM, Monosizer W710L, Morflex 510, Staflex TOTM, Trimex T 08 It has almost the same density of water.
Re: [Vo]:Electric generator configuration described [Copy 2]
I wrote: It takes about 4 minutes for the reactors to go to maximum power. I meant from stand-by mode. I don't know how long it takes from being fully off. A cold fusion power reactor would be left in stand-by mode I think. There is no need to turn it all the way off to save fuel, obviously. You might want to turn it off to reduce wear and tear on the glycol pump and other components. The 4 minutes was quoted in their blog, by the spokesperson. - Jed
Re: [Vo]:Electric generator configuration described [Copy 2]
On 2011-07-06 02:43, Jed Rothwell wrote: They have tested other liquids for higher temperature applications. I don't know what these other liquids are, but one of them reaches 414°C. Who says that it has to be a pressure of 1 bar? For example at 35 bar the boiling point of ethylene glycol could be raised to about 410 °C (although self-ignition might start being a problem at lower temperatures as pressure is increased). Cheers, S.A.
Re: [Vo]:Electric generator configuration described [Copy 2]
Akira Shirakawa shirakawa.ak...@gmail.com wrote: They have tested other liquids for higher temperature applications. I don't know what these other liquids are, but one of them reaches 414°C. Who says that it has to be a pressure of 1 bar? For example at 35 bar the boiling point of ethylene glycol could be raised to about 410 °C They said it was a different liquid. They may have said what it is, but I do not recall and I cannot find the message. I have been having some trouble accessing their forum, and the search feature does not work well. - Jed
