Am 19.10.2011 16:19, schrieb Horace Heffner:
On Oct 19, 2011, at 5:39 AM, peter.heck...@arcor.de wrote:
[snip]
Somebody has calculated, at 1MW the steam must go supersonic with
this output tube.
Then, with 100 kW it must still go some 100 km/h.
[snip]
I got 803 km/hr, which is less than the speed of sound. You may want
to check my calculations!
Energy of 99.6° Steam = 2675 kJ/kg
I took this from an industrial steam table and this assumes 0° water
temperature.
So lets assume this as best case assumption in favor for Rossi.
Mass flow of steam at 1000 kJ/s = 1000 kJ/s / (2675 kJ/kg) = 0.3738 kg/s.
Steam volume at 100° is obtained if the equivalent water volume is
multiplied by 1700.
Steam volume is: 0.3738 l/s * 1700 = 635.5 l/s = 635500 cm^3 /s .
Steam Flow is: 635500 cm^3/s / (33cm^2) = 19258 cm/s = 192.5 m/s = 693.3
km/h
And yes, this is less than speed of sound.
Of course this calculation can only show the order of magnitude, because
this speed is impossible at air pressure.
But still I think this speed is too much.
He can do something about this, if he finally uses glycol and higher
temperatures or adds some tube.
But there still is the problem that all these hot FAT Cats would heat
the container (and the reactor cores) above 100°.
Now he is a genial inventor and I am sure he knows about these obvious
problems and will be prepared.
So let's wait, maybe he has other surprises.
Using the photos here:
http://www.nyteknik.se/nyheter/energi_miljo/energi/article3264361.ece
The outside width of a standard container is 8 feet, or 2.44 meters
From the full photo of the back side:
The 8 feet = 129 pixels.
The red handle = 16 pixels = (16 px)*(2.44 m)/(129 px) = 30 cm, much
larger than I would have thought.
In the closeup photo the handle is 94 px, giving (30 cm)/(94 px) =
0.319 cm/px.
The cap is 40 px, or 12.8 cm OD.
The exit pipe appears to have a 22 px OD, or 7 cm OD. Maybe the pipe
is 6.5 cm ID, or 3.25 cm radius, giving an area pi*(3.25 cm)^2 = 33 cm^2.
The energy put into the steam depends on the temperature to which it
is condensed before being fed back into the E-cat.
Assume the condensed water is being fed back at 100°C.
The energy to vaporize water at 100°C is 2260 J/g. If 1 MW is heating
100°C water then I estimate the flow has to be 442.5 gm/s, with a
volumetric flow of 737.5 liters/sec. This gives a flow velocity of
(737500 cm^3/s)/(33 cm^3)= 223 m/s in the pipe, or 803 km/hr. This is
below the speed of sound but over 6 times the recommended speed for
the pipe size.
If I did the calculations right, then this indicates the device could
blow up. If there are emergency steam relief valves on the devices
the steam could be released inside the container.
Note, if water is fed back at 50°C I get only 675 liter/sec steam flow.
Related assessments can be found here:
http://www.mail-archive.com/vortex-l@eskimo.com/msg51512.html
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
