Gigi DiMarco <gdmgdms...@gmail.com> wrote:

> you continue to be wrong.
> If you have constant ambient and constant heat source the temperature
> difference will stay constant. No exponential decrease. Sorry.
>

If the power remains the same for the entire test, that is correct. It
reaches the terminal temperature, and it does not not fall. If ambient
remains steady, so does the reactor temperature. If ambient rises or falls,
the reactor temperature follows with a long lag.

On the other hand, if you reduce power, the temperature declines. That is
what you see in Mizuno's data after the heat pulses and after anomalous
heat fades away. It falls exponentially.

The temperature gradually falls back down to within ~0.6 deg C of ambient
(which is a moving target when the room is cooling off). It always reaches
that temperature by the next morning. That is convenient for Mizuno,
because it lets him start a new test every day. If the insulation were
better, he would have to have active cooling to bring the reactor back down
to the starting point. Or he would have to start at an elevated
temperature, which would make comparing tests complicated.

- Jed

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