In reply to Angela Kemmler's message of Thu, 23 Jun 2011 21:18:33 +0200: Hi, [snip] >He uses a metering pump by manufacturer LMI (UK). Its model P18. Lewan told it. > > >http://www.lmi-pumps.com/datasheets/Pseries-08-01.pdf > >max 3.20 GPH (12.1 l/h) 22 psi (1.5 Bar) >max stroke frequency = 100 / minute >max stroke volume = 2 ml > >manual of the pump >http://www.lmi-pumps.com/datasheets/Pseries-08-01.pdf > > >The problem I see is the follwing: Rossi was asked several times to explain >how he switchs off his reactor. He said that he would stop electrical heating >and would increase the water flow in order to cool down the reactor. But: why >did the reactor continue to operate in the february test? During that test, >the water flow was increased (using the tap pressure, not the pump). > >Temperatures were: > >15 C input >20 C output > >(note: there is no report so far). How could the reactor work under these >conditions? Angela
I suspect that there is a reasonably large thermal gradient within the reactor, so an output temperature of 293 K or 373 K may not make much difference to the reaction itself. IOW tuning it off with a sharp increase in cooling water, only works when combined with rapid reduction of power from the electrical heater. This combination causes a fairly rapid drop in the working temperature of the core, which then quenches the reaction. BTW I don't know whether or not Rossi actually has an internal heater in direct contact with the Ni powder, but he might find it easier to control if he did, particularly if that heater had a low thermal mass, and thus a fast response time. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
