This is interesting but also partially he describes known stuff, such as degassing and boiling delay. Of course engineers and chemists know about boiling anomalies, an technical devices are built in such a way that anomalies are avoided or prevented. Also the water is treated to prevent these effects.
This is also a reason why Rossi should open his vaporizer, so that we can see if this is a normal boiling process. He refuses even to tell us, if it works inside like a vessel boiler or like a flash boiler and under such circumstances his measurements cannot been acepted. Boiling is a turbulent process and nonlinear chaotic circumstances can happen without doubt. Because there is a lot of movement and turbulence we cannot assume that the dynamic pressure is constant at each location in the fluid. It is therefore clear that the boiling temperature of 100° is an idealized /theoretic/ value. It is clear there are fluctuating temperature gradients inside the boiling water and the temperature measured in the water depends from the measuring method and measurement location. Boiling temperature is not measured in very turbulent boiling fluids. Boiling temperature is a theoretical value when the steam pressure equals the air pressure. However there is one important point that professor chang doesnt discuss: The condensation temperature of steam at air pressure. This is very accurately 100° and actually this is what we mean with "boiling temperature". Condensation is a nonturbulent process and the condensation temperature is easily measured and I doubt, professor Chang would find variations in the condensation temperature if he had measured it. He should not only measure the fluid temperature, but also the steam temperature and the condensation temperature. Best regards, Peter ----- Original Nachricht ---- Von: Harry Veeder <hveeder...@gmail.com> An: vortex-l@eskimo.com Datum: 21.11.2011 05:36 Betreff: [Vo]:The Myth of the Boiling Point > http://www.hps.cam.ac.uk/people/chang/boiling/ > > begin quote <<We all learn at school that pure water always boils at > 100°C (212°F), under normal atmospheric pressure. Like surprisingly > many things that "everybody knows", this is a myth. We ought to stop > perpetuating this myth in schools and universities and in everyday > life: not only is it incorrect, but it also conveys misleading ideas > about the nature of scientific knowledge. And unlike some other myths, > it does not serve sufficiently useful functions. > > There are actually all sorts of variations in the boiling temperature > of water. For example, there are differences of several degrees > depending on the material of the container in which the boiling takes > place. And removing dissolved air from water can easily raise its > boiling temperature by about 10 degrees centigrade. > > The fickleness of the boiling point is something that was once widely > known among scientists. It is quite easy to verify, as I have learned > in the simple experiments that I show in this paper. And it is still > known by some of today's experts. So actually the strange thing is: > why don't we all hear about it? Not only that, but why do most of us > believe the opposite of what is the case, and maintain it with such > confidence? How has a clear falsehood become scientific common > sense?>> end quote > > He goes on to describe six experiments with ideo clips of each: > ?Experiment 1. The indefiniteness of the boiling point > ?Experiment 2. Different temperatures in different vessels > ?Experiment 3. Lower temperature in a hydrophobic vessel > ?Experiment 4. The action of boiling chips > ?Experiment 5. Superheated boiling by slow heating > ?Experiment 6. Superheating facilitated by de-gassing > > Evidently Hasok Chang is not familiar with the progress in CF research > because he expresses some concern that his critique of the myth of > boiling point could be an error just like "cold fusion" was an error. > ;-) > > Harry > >
