Hello Jed,
How do we know that all the water ( 8.8 l) evaporated? Was the Rossi device
weighted before and after the test? The diameter of the device is about 10
cm, so there could still be a few liters inside after the experiment. An
easy way to measure the heat of this system more accurately would have been
to increase the waterflow to e.g 100 ml /sec ( about 20 times higher as the
flow that was used). If 12 kW was produced one would have measured a
temperature increase of 30 degrees constantly, with a power input of only
700-800W. This would have been a very practical system because normally with
700-800 W you can not have a shower with hot water. You need about 10 kW. If
Rossi had demonstrated that he could heat such an amount of water
continously for an hour he could have convinced almost anybody. Why didn`t
he do that?
Peter
----- Original Message -----
From: "Jed Rothwell" <jedrothw...@gmail.com>
To: <vortex-l@eskimo.com>
Cc: <vortex-l@eskimo.com>
Sent: Monday, January 17, 2011 3:20 PM
Subject: [Vo]:Brief Description of the Calorimetry in the Rossi Experiment
at U. Bologna, January 14, 2011
Brief Description of the Calorimetry in the Rossi Experiment at U.
Bologna, January 14, 2011
by Jed Rothwell
The experiment has been underway at U. Bologna since mid-December 2010. It
has been done several times. Several professors with expertise in related
subjects such as calorimetry are involved.
LIST OF MAIN EQUIPMENT IN EXPERIMENT
A hydrogen tank mounted on a weight scale which is accurate to 0.1 g
10 liter tank reservoir, which is refilled as needed during the run
Displacement pump
Tube from pump to Rossi device (The Rossi device is known as an "ECat")
Outlet tube from the Rossi device, which emits hot water or steam
Thermocouples in the reservoir, ambient air and the outlet tube
An HD37AB1347 IAQ Monitor (Delta Ohm) to measure the relative humidity of
the steam. This is to confirm that it is “dry steam”; that is, steam only,
with no water droplets.
Alternating-current heater used to bring the Rossi device up the working
temperature
METHOD
The reservoir water temperature is measured at 13°C, ambient air at 23°C.
The heater is set to about 1000 W to heat up the Rossi device. Hydrogen is
admitted to the Rossi device.
The displacement pump is turned on, injecting water into the Rossi device
at 292 ml/min.
The water comes out as warm water at first, then as a mixture of steam and
water, and finally after about 30 minutes, as dry steam. This is confirmed
with the relative humidity meter.
As the device heats up, heater power is reduced to around 400 W.
RESULTS
The test run on January 14 lasted for 1 hour. After the first 30 minutes
the outlet flow became dry steam. The enthalpy during this last 30 minutes
can be computed very simply, based on the heat capacity of water (4.2
kJ/kgK) and heat of vaporization of water (2260 kJ/kg):
Mass of water 8.8 kg
Temperature change 87°C
Energy to bring water to 100°C: 87°C*4.2*8.8 kg = 3,216 kJ
Energy to vaporize 10 kg of water: 2260*8.8 = 19,888 kJ
Total: 23,107 kJ
Duration 30 minutes = 1800 seconds
Power 12,837 W, minus auxiliary power ~12 kW
There were two potential ways in which input power might have been
measured incorrectly: heater power, and the hydrogen, which might have
burned if air had been present in the cell.
The heater power was measured at 400 W. It could not have been much higher
that this, because it is plugged into an ordinary wall outlet. Even if a
wall socket could supply 12 kW, the heater electric wire would burn.
During the test runs the weight of the hydrogen tank did not measurably
decrease, so less than 0.1 g of hydrogen was consumed. 0.1 g of hydrogen
is 0.1 mole, which makes 0.05 mole of water. The heat of formation of
water is 286 kJ/mole, so if the hydrogen had been burned it would have
produced less than 14.3 kJ.
