On Aug 30, 2011, at 4:52 AM, Jouni Valkonen wrote:
2011/8/30 Horace Heffner <hheff...@mtaonline.net>:
Note especially in RossiThermal2.pdf, in Mode 2, that a mass of
between 5
and 10 kg, at initial Mass Temp. of 300*C, provides a 15 minute
thermal
decline curve with no nuclear energy involved.
Good thinking, expect that the total metal weight of the E-Cat is ca.
5kg. Perhaps quite bit less. And we still need to worry that
insulation material cannot withstand high temperatures and also the
parts of E-Cat that are in direct contact with water cannot exceed
100°C.
This demonstrates the importance of calculating the thermal
resistance of the device, even in this simple model. The temperature
of the surface adjacent to the water will be near the temperature of
the water. A thermal differential, a gradient, exists between the
catalyst surface and the water surface, or heater surface and water
surface. The magnitude of the differential is dependent on the
thermal resistance of the material. The main thermal mass can be
extremely hot provided the thermal resistance is adequate. Of course
a finite element analysis would be best, but my simple model
hopefully provides much more insight into the problems involved than
one can obtain from a non-quantitative discussion.
One of the items clearly identified for discussion by my model is
what reasonable values are for the effective thermal resistance of
the device. If an assumed set of input data produces an impossible
thermal resistance, then the input data can be rejected as self-
inconsistent.
Therefore total mass that can store thermal energy (i.e.
heating element or the core) cannot weight more than 500 grams.
On what do you base this claim? All the mass of the device is involved.
Therefore I suggest you slight revision of calculations.
–Jouni
It appears you are suggesting a revision of the input data. If you
provide numbers for Mass, Thermal Power (before shutoff), Inlet
Temp., Mass Temp., and Inlet Flow then I will then be happy to
provide the corresponding data.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
