On Tue, Dec 6, 2011 at 5:20 PM, Jed Rothwell <[email protected]> wrote:
> > 1. Safety. You want to be sure the heat will be removed even if it > increases a great deal, the way it did on Feb. 10. > Ah. The favorite excuse, second only to secret sauce. But the heat exchanger had no effect on the heat removed from the ecat. The condensed steam went down the drain after the exchanger, and only the primary fluid affects the cooling in the ecat. Non-starter. > > 2. Most people I know who do a lot of calorimetry prefer a smaller Delta > T, between 5 and 10°C. They prefer to keep the absolute high temperature > below ~30°C. Above that you get problems with the fluid characteristics > changing, and the conversion rate of 4.12 J = 1 cal. starts to change a > little. > Come on. Now you're worrying about a fraction of a per cent. Totally bogus. It may be easy to measure 5 - 10 degrees if you put the probes in the right place. But where they were, the temperature jumped around by a few degrees. The most obvious scenario is that the probes were placed to exaggerate the heat and to give fluctuations to make it hard to measure. The high flux was used to make it even more uncertain. Nobody does uncertainty like Rossi.
