From another list:


> Brief Description of the Calorimetry in the Rossi Experiment at U.=20
> Bologna, January 14, 2011
>
> by Jed Rothwell
>
> The experiment has been underway at U. Bologna since mid-December=20
> 2010. It has been done several times. Several professors with=20
> 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=20
> of the steam. This is to confirm that it is =93dry steam=94; that is,=20
> steam only, with no water droplets.
>
> Alternating-current heater used to bring the Rossi device up the=20
> working temperature
>
> METHOD
>
> The reservoir water temperature is measured at 13=B0C, ambient air at 23=
=B0C.
>
> The heater is set to about 1000 W to heat up the Rossi device.=20
> Hydrogen is admitted to the Rossi device.
>
> The displacement pump is turned on, injecting water into the Rossi=20
> device at 292 ml/min.
>
> The water comes out as warm water at first, then as a mixture of steam=20
> and water, and finally after about 30 minutes, as dry steam. This is=20
> 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=20
> minutes the outlet flow became dry steam. The enthalpy during this=20
> last 30 minutes can be computed very simply, based on the heat=20
> capacity of water (4.2 kJ/kgK) and heat of vaporization of water (2260=20
> kJ/kg):
>
> Mass of water 8.8 kg
> Temperature change 87=B0C
> Energy to bring water to 100=B0C: 87=B0C*4.2*8.8 kg =3D 3,216 kJ
> Energy to vaporize 10 kg of water: 2260*8.8 =3D 19,888 kJ
> Total: 23,107 kJ
>
> Duration 30 minutes =3D 1800 seconds
>
> Power 12,837 W, minus auxiliary power ~12 kW
>
> There were two potential ways in which input power might have been=20
> measured incorrectly: heater power, and the hydrogen, which might have=20
> burned if air had been present in the cell.
>
> The heater power was measured at 400 W. It could not have been much=20
> higher that this, because it is plugged into an ordinary wall outlet.=20
> Even if a wall socket could supply 12 kW, the heater electric wire=20
> would burn.
>
> During the test runs the weight of the hydrogen tank did not=20
> measurably decrease, so less than 0.1 g of hydrogen was consumed. 0.1=20
> g of hydrogen is 0.1 mole, which makes 0.05 mole of water. The heat of=20
> formation of water is 286 kJ/mole, so if the hydrogen had been burned=20
> it would have produced less than 14.3 kJ.
>


--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.