X-Message-Number: 3619 Newsgroups: sci.cryonics From: (John de Rivaz) Subject: Re: cooling References: <3ecvfh$> Date: Fri, 6 Jan 1995 07:46:19 +0000 Message-ID: <> In article: <3ecvfh$> (Perry E. Metzger) writes: > > ----------- CryoNet Message Auto-Forwarded by ------------ > ----------- Kevin Q. Brown <> ------------- > > Date: Mon, 2 Jan 95 22:37:57 EST > From: (Perry E. Metzger) > Subject: SCI.CRYONICS: yet more lunacy from J. Coetzee > > Jan Coetzee yet again writes another indignant message about using > peltier effect devices to flash freeze whole humans, and seems to > believe that somehow the Peltier effect will let him avoid Newtons law > of cooling. > (remainder deleted) The problem here is that people find the difference between cooling and heating difficult to understand. We can heat uniformly using RF heating (better than microwaves at getting deep into the object) but as far as I know there is no analagous process for cooling, ie one can't produce a field that extracts kinetic energy from molecules in the same way RF can add to it. Cooling has to be via convection, conduction or radiation. The only way I could speculate that a body could be rapidly cooled is using a nanotechnological system of heat pipes, but if one could do this one would probably have the technology to cure the body anyway. Sincerely, John de Rivaz Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=3619