megawatt ecat produces 70 kW [very little steam, mixed with water]: Joshua Cude: Rich Murray 2011.10.31

[Rich Murray-2]

megawatt ecat produces 70 kW [very little steam, mixed with water --
cup of tea, anyone?]: Joshua Cude: Rich Murray 2011.10.31

[ Rich Murray: this nail in the coffin goes right to the point...
using Rossi's own data... ]

http://tech.groups.yahoo.com/group/H-Ni_Fusion/message/791

[H-Ni_Fusion] megawatt ecat produces 70 kW

from joshua.cude [hidden email]
reply-to [hidden email]
to [hidden email]
date Mon, Oct 31, 2011 at 4:02 AM
subject [H-Ni_Fusion] megawatt ecat produces 70 kW
mailing list <H-Ni_Fusion.yahoogroups.com>
4:02 AM (1 hour ago)

The presented evidence from the megawatt demo does not support output
power above 70 kW in the "1 MW reactor".

The calculation used by Rossi and Fioravanti to claim 470 kW assumes
that essentially all the water pumped through the system is vaporized.

However, there is no evidence presented in the report to support that
assumption.

Rossi collects liquid water at the exit of the reactor, but there is
no evidence presented that liquid cannot be carried past this
collector, entrained in the fast flowing steam, and into the heat
exchanger.

The only measurement reported is the temperature of the fluid as it exits.

This is on average about 105 C, which probably corresponds to the
boiling point inside the conduit at an elevated pressure due to the
formation of some steam.

The fact that no independent measurement was reported of pressure or
steam quality indicates that Fioravanti is no more competent than
Essen and Kallunder were.

If one accepts the notion that above 100 C, the steam is dry, then the
total power transfer is proportional to:

T2-T1                                              if     T2 <= 100

T2-T1 + 540 + (T2-100)(.5)                if      T2 > 100

By this calculation, at 100 C, the power transfer is about 65 kW, and
at 100.1 C it is about 470 kW.

The blue line in the attached figure (PowerTransfer.jpg) represents
the result of this calculation for Rossi's latest data in arbitrary
units. (The plateau would be about 470 kW.)

Or even if you want to claim that the steam is only dry when it
reaches 105 C a few minutes later, then the power would follow the
dashed line.

So Rossi and Fioravanti  want us to believe that although it takes 2
hours for the power transfer to reach 65 kW (100C), it takes only a
few minutes to go from 65 kW to 470 kW.

The power transfer to the water is proportional to the temperature
difference between the water and the heating elements.

So this amounts to a claim that the temperature of the heating
elements changes essentially discontinuously by a huge amount, and
exactly when the water begins to boil.

How does it know?

And how does it know to stop increasing essentially as soon as all the
water is vaporized?

If the power increased by another 10%, the steam temperature would
increase to more than 200 C.

Yet it settles in nicely to a fairly constant temperature just above
100 C, just as if regulated by a mixture of phases at the boiling
point, which fluctuates a little because of irregular internal
pressure.

Such a discontinuous change in the temperature is simply not plausible.

A few minutes after it reaches 100 C, the power transfer must still be
quite close to the 65 kW, even as the temperature reaches 105 C.

That means that the temperature is no indication of dry steam, and so
the most we can say from the data presented, if it is accepted, is
that the power output is higher than about 70 kW.

No data is presented to determine how much higher.

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