My review at:
http://www.mtaonline.net/~hheffner/Rossi6Oct2011Review.pdf
has been very substantially updated. The most important update is
inclusion of the following section:
SAMPLE SPREADSHEET INCORPORATING POWER ADJUSTMENT FACTOR
A sample spreadsheet incorporating flow rates based on water meter
readings, and having a delta T, and thus output power, adjustment
factor Tadj = 0.25 is located at:
http://www.mtaonline.net/~hheffner/Rossi6Oct2011vol1sim.pdf
A graph of the important values can be found in Graph 5, appended.
A large scale version of Graph 5 can be found at:
http://www.mtaonline.net/~hheffner/Graph5.png
One key thing to note regarding Graph 5 is that Eout at the end of
the run is less than Ein by about a kWh. This reflects energy stored
in the heat remaining in the E-cat.
Maximum stored energy, 6.727 kWh, 24.2 MJ, occurs right before 15:53,
280 minutes into the run, right before power is turned off, and the
“self sustaining running” begins.
Storing the 24.2 MJ requires a mean storage Delta T of (2.42x10^7
J)/(2.3x10^4 J/°C) = 1052°C. Assuming the metal started out at 27°C
that means an iron temperature of 1079°C.
This sets a limit on the period of heat after death boiling that can
occur. If the central metal is heated to 1079°C then energy stored
for boiling is 979°C * (2.3x10^4 J/°C) = 22.5 MJ.
To last through the heat after death period from 280 min. to 476 min.
= 196 min., the water boiling power output is limited to an average
of 22.5 MJ/(196 min.) = 1148 W. Limiting the mean thermal output of
the stored thermal mass to a mean output of 1148 W requires a
significant degree of thermal resistance between the thermal mass and
the water heat exchanger above the thermal mass.
At a midpoint of heat after death, thus a thermal mass delta T of
979°C/2 = 490°C to the boiling water, the thermal resistance
required between the thermal mass and the water is (490°C)/(1148 W) =
0.426 °C/W.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
