Another comment: since the pressure at the *reactor exit* is likely to be significantly higher than 1 atm, then even if there were dry steam at the reactor exit, the velocity at the *reactor exit* might be significantly less (perhaps 10 times less) than my previous calculation. As the steam proceeded down the tube to the tube exit, the speed would be further reduced if the density increased due to condensation.
On Wed, Jul 31, 2013 at 1:15 PM, Franco Talari <franco.tal...@gmail.com>wrote: > Correction: my previous calculation actually assumed a 2 cm diameter (1cm > radius). Assuming a 1 cm diameter and pure steam give a 4 times higher > value (132 m/sec). > > > > On Wed, Jul 31, 2013 at 12:54 PM, Franco Talari > <franco.tal...@gmail.com>wrote: > >> Can someone tell me the diameter of the steam exhaust tube? If I assume >> a 1 cm diameter, along with 18 g/mole of H2O and 1000 g/liter and 1000 >> cc/liter for water and 0.5 liter/minute input flow, then assuming the ideal >> gas law (22.4 liter/mole at STP) as an approximation for steam at >> atmospheric pressure I get for the output velocity, >> v = (0.5 l/minute)(1 minute/60 sec) (1000 g/liter) (1 mole/18 g) (22400 >> cc/mole)/(pi*1cm*1cm) = 3300 cm/sec = 33 m/sec >> >> for the exhaust. This seems quite large although the cooling and back >> pressure may lead to condensation/slowing-down as the steam proceeds >> further out of the reactor. Note that this calculation of the exit speed >> does not rely on any knowledge of the "back-pressure" but simply on the >> input flow (water is incompressible) and the assumption that it is all >> converted to steam. If instead, it is converted to superheated water >> droplets (wet steam?) due perhaps to back-pressure which raises the boiling >> temperature, then the exit speed would be much less, and might be more >> reasonable. >> >> Any comments? >> >> >> On Wed, Jul 31, 2013 at 11:17 AM, Jones Beene <jone...@pacbell.net>wrote: >> >>> ** ** >>> >>> *From:* Jed Rothwell **** >>> >>> **** >>> >>> The claim of testing isotopes to determine that only Ni61 is inactive - >>> is >>> IMO clearly fiction. There are others but this is the most blatant. >>> >>> This is a company which has been on the verge of financial collapse until >>> recently and these isotopes cost at least $20,000 per [gram], and several >>> ounces of each [24 grams minimum] would be needed to determine activity. >>> **** >>> >>> ** ** >>> >>> Ah, I see your point. **** >>> >>> ** ** >>> >>> Other details stand out as a bit fishy, even to supporters of LENR but >>> in the demo – the half-liter+ per minute of water turning into steam is the >>> most troubling. And it is not so much from the lack of visual evidence of >>> steam, as from the lack of sound. This came to mind just now as my teapot >>> was shrieking-out a deafening reminder of what ~500 watts sounds like.** >>> ** >>> >>> ** ** >>> >>> Of course the 20+ kilowatts implied by that much water flow (in the DGT >>> demo) would be fabulous on first blush, but …. think about the sound (or >>> lack thereof). **** >>> >>> ** ** >>> >>> When you are driving a moderate speed in an average car – about 20 >>> kilowatts of thermal energy goes out the exhaust pipe - which is typically >>> 2-2.5 inches diameter in the USA. The DGT reactor supposedly was pushing >>> over 20 kilowatts of hot gas though a tube which was 10 times narrower >>> (less diameter) or 100 time less area for the escape of hot gases. **** >>> >>> ** ** >>> >>> The DGT reactor exhaust should have been SCREAMING with an unbearably >>> loud hiss like the equivalent of about forty teapots on full boil.**** >>> >>> ** ** >>> >>> Is this criticism “sound” or not?**** >>> >>> ** ** >>> >>> ** ** >>> >> >> >
