> From: "David Roberson" <[email protected]> > Sent: Sunday, August 4, 2013 1:58:16 PM
> > This is interesting information. If the cold water input flow rate > drops due to back pressure from the vaporized steam, then there is a > serious problem. Most of my considerations have been based upon the > belief that the flow rate was accurately measured. Unfortunately, if > that reading was reduced by pressure from the vapor downstream, then > the power calculations is in doubt. I have also been concerned about > the lack of noise which should be associated with the escaping > steam. > > > It is too bad that the steam was not captured within a bucket of > water and weighed as when the calibration was done. It will be > refreshing to some day observe at least one test of an LENR device > that is not questionable. I didn't keep track of all my web-site visits, but based on a tube diameter of about 2cm (inner?) it seemed that at about 140C saturated steam the pressure drop through about 20m of tube would only be about 0.5 bar (All that from memory). Hadjichristos said that they couldn't get enough flow from the water mains to keep the output below boiling. I think the problem there is with the multiple filters, which are un-needed for a few-hour test. (Sure, if you're running it for a year you want to prevent boiler scale) I don't see any reason why they couldn't keep the output temperature at 50C (recommended, to avoid risk of scalding) http://www.accuratebuilding.com/services/legal/charts/hot_water_burn_scalding_graph.html delta-T 25C Plugging in the values to my steam calculator http://lenr.qumbu.com/ecatcalc.php?plot=Plot&ever=c&efzx0=0&efzy0=0&efzx9=9&efzy9=9&esl=1&epbr=1&enm=Defkalion+water&edh=0&edm=1&eds=0&eif=12&eip=2&ecp=0&eop=22&eoxr=1&et0=25.62&ep0=1&et1=25.62&et2=100&er2=1 means they would need 720 kg/hour For a 20mm ID tube, http://www.tlv.com/global/TI/calculator/water-velocity-through-piping.html the water velocity would be 0.64 m/sec. Or http://www.tlv.com/global/TI/calculator/water-pipe-sizing-velocity.html -- (I used mainly default values -- I presume for water) -- indicates that a 17mm inner diameter would work (pressure drop 0.14 bar, velocity 0.8 m/sec) I think the answer is to use Rossis's techninque -- a cold-tank to hot-tank -- plus bucket-filling spot-checks -- so that one could SEE major errors (in addition to any flow-meters) In any event -- lock the physicists out of the building, and hire/recruit a competent electrical and thermal engineer!
