The kilopower system runs at 800C at an efficiency of 38%. It delivers heat
from the nuclear fuel via sodium heat pipes.

permalink.lanl.gov/object/tr?what=info:lanl-repo/lareport/LA-UR-17-21903

Would it be possible to use refractory material in the construction of the
engine to get its operating temperature up higher?



On Thu, Nov 16, 2017 at 3:07 PM, Bob Higgins <rj.bob.higg...@gmail.com>
wrote:

> While the Carnot efficiency certainly goes up with temperature, the
> lifetime of the materials go down rapidly above about 500C.  Most
> commercial high reliability systems operate at about 300C.  The Sterling
> engine will have its share of material problems at 600C hot end, but is
> going to be a non-starter with the hot end at 3000C.  Of course, he could
> always insulate and take the heat out at 600C while taking the hit in
> efficiency.
>
> At 3000C, you will have substantial optical radiation - what happened to
> Mills' plan to use PV conversion?  I always thought that the high energy PV
> conversion he planned was much farther out than what he stated.
>
> On Thu, Nov 16, 2017 at 12:51 PM, Axil Axil <janap...@gmail.com> wrote:
>
>> Mills could also use the Kilopower solution. At 3000C, the effect must be
>> way over 38%.
>>
>> On Thu, Nov 16, 2017 at 2:36 PM, <mix...@bigpond.com> wrote:
>>
>>> In reply to  JonesBeene's message of Wed, 15 Nov 2017 18:15:22 -0800:
>>> Hi,
>>> [snip]
>>> >Sooner or later, it is likely that Mills will have a defector – unless
>>> of course he really has a breakthrough, but all indications are that this
>>> is the latest in a long string of over-hyped failures.
>>> >
>>> [snip]
>>> I don't think it's actually a failure, but rather shifted to the back
>>> burner, in
>>> favor of a design he thinks may be more likely to work. I suspect he went
>>> looking for another conversion technology after I pointed out to him
>>> that silver
>>> vapor wouldn't condense to a liquid in a cavity with a uniform
>>> temperature of
>>> over 3000 degrees.
>>>
>>> Regards,
>>>
>>> Robin van Spaandonk
>>>
>>> http://rvanspaa.freehostia.com/project.html
>>>
>>>
>>
>

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