The events leading up to the excess heat are also significant. Apparently in the heat treatment phase the H2 pressure was topped up with a tank to 500kPa and it stayed there a while. Then the pressure began to fall gradually to 300kPa where, at about 14:15, the pressure was topped up again to 500kPa. At about 14:30, the pressure suddenly drops to about 100kPa (1 bar absolute), presumably by the pressure being quickly vented. The venting seems to be responsible for sudden cooling of T2 1260C to 1150C. It is possible that by gas expansion out of the fuel capsule, the whole fuel capsule cooled by Joule-Thompson effect. So, venting the gas cooled the fuel. The fuel stayed at this temperature or increased a little as long as T1 was bigger than T2. Up until this point, the temperature of T2 seems mostly explainable.
However, at some point, when T1 had fallen to about the same temperature as T2, T2 began rising even though T1 was still declining. This is a smooth change in T2 temperature and looks to be a valid temperature measurement, indicating heat coming from the fuel. If I saw this, I would have been excited. On Tue, Mar 1, 2016 at 3:38 PM, Jed Rothwell <jedrothw...@gmail.com> wrote: > I wrote: > > >> Minute 41. T2 begins falling much faster. >> > > This is a little hard to see. Look carefully. The slope of T2 changes a > lot. At face value, that does indicate there is a source of heat in the > cell which cuts off when the slope increases. > > I am not saying this is definitive. > > Let me illustrate this with a small image. Slope 1 is shown with a green > line, (and marked "1"). Slope 2 is shown with a red line: > > > > > > - Jed > >
