home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!munnari.oz.au!metro!seagoon.newcastle.edu.au!cc.newcastle.edu.au!medb
- From: medb@cc.newcastle.edu.au (Dieter Britz)
- Subject: HUNDREDS?
- Message-ID: <1992Jul21.224741.1@cc.newcastle.edu.au>
- Lines: 35
- Sender: news@seagoon.newcastle.edu.au
- Organization: University of Newcastle, AUSTRALIA
- References: <920720154844_72240.1256_EHL23-1@CompuServe.COM>
- Date: Tue, 21 Jul 1992 12:47:41 GMT
-
- In article <920720154844_72240.1256_EHL23-1@CompuServe.COM>, Jed Rothwell
- <72240.1256@compuserve.com> writes:
- > most, but you skeptics should face reality: *hundreds* of other
- > experimentalists have observed this, albeit at lower levels. HUNDREDS. Many of
-
- I'll be the mug: who are these HUNDREDS? Or are you plucking facts out of the
- air, Jed? Remember, I have the bibliography (and you have it too), and there
- are some HUNDREDS of experimental papers alright, but not HUNDREDS of
- calorimetry papers or authors. Where do you get this number from? Give us a
- list of names.
-
- > I see you have taken a shot at explaining the error:
- >
- > "As I have pointed out several times, power into a resistor is not necessarily
- > the same as power into an operating cell, since the latter might lead to a
- > more complex waveform that might or might not lead to your power measurement
- > being skewed. It is my understanding that it was a problem like this that
- > made it so difficult to diagnose what was going on with the Neumann energy
- > machine."
-
- Here I must come in on Jed's side (I think it's his side). In most cells I
- have read about, the current is controlled, i.e. constant for periods of time.
- As long as the cell voltage then does not cross zero (and that cannot happen),
- AND as long as you are not extremely unlucky and sample synchronously with
- some periodicity of the cell voltage (e.g. only at the highs, or lows, of a
- sine-wave shape), then the power is indeed the same as for a resistor. There
- are persistent suggestions of high-frequency oscillations in the current
- supply, and I persistently maintain that this is almost impossible. For
- constant current and positive cell voltage, Int(i*E).dt ("Int" meaning
- integral) is the same as i*Int(E).dt = i*<E>, i.e. current times the mean cell
- voltage E. If there is a flaw in claims of excess heat, this is not its source.
-
- Dieter alias medb@cc.newcastle.edu.au
- -------------------------------------
-
-