Bob, Your question concerning the measured atmospheric pressure when the fluid output was reading 102 C remained on my mind last night. That did seem curious when it appeared that the vapor and liquid combination should be in equilibrium.
My first thought was that perhaps a measurement error due to meter accuracy might explain the problem, but then a second thought arose. It is obvious that the water carrying vapor would be moving at a high velocity once they flashed through the restriction into the output steam line. If you recall a moving mass of gas like material is subject to a reduction in pressure due to the Bernoulli effect. This is the same principle that draws gasoline into the air stream of an internal combustion carburetor. Thus far I have not performed the actual calculation which would determine the expected pressure drop, but hope to complete that task if my line of inquiry gains momentum. It certainly does not appear impossible for the magnitude of the effect to drop the pressure from an initial value of 15.7902 psi absolute to atmospheric which is 14.6954 psi absolute. That is only a 6.9% reduction. The moving fluid would not effect the temperature gauge reading in a similar manner. Everyone should understand that my hypothesis is an attempt to locate a scientific explanation for the apparent lack of real power being delivered to the customer from the Rossi system if one assumes that there is a problem with the actual results. The Rossi 1 MW system might operate as supposedly reported by the ERV, but many on vortex are convinced that this is not true. We need to determine what the real facts are. Dave -----Original Message----- From: David Roberson <dlrober...@aol.com> To: vortex-l <vortex-l@eskimo.com> Sent: Tue, Aug 23, 2016 12:27 am Subject: Re: [Vo]:Interesting Steam Calculation Dave-- Where did the pressure of 15.75 psi abs come from? I thought the pressure of the 102C dry steam (assumed) was 1 atmos.--not 15.75 abs. I think your assumed conditions above 1 atmos. were never measured. Bob Cook Bob, I used a steam table calculator located at http://www.tlv.com/global/TI/calculator/steam-table-pressure.html to obtain my data points. According to that source, 14.6954 psi abs is 0 bar at a temperature of 99.9743 C degrees. At 102 C degrees the pressure is shown as 15.7902 psi absolute. Also, at 15.75 psi abs you should be at 101.928 C. I must have accidentally written the last digit in error for some reason. Does this answer your first question? You are correct about the assumed pressures above 1 atmosphere not being measured directly. I admit that I rounded off the readings a bit, but the amount of error resulting from the values I chose did not appear to impact the answers to a significant degree. In one of Rossi's earlier experiments the temperature within his ECAT was measured to reach a high of about 135 C just as the calculated power being measured at the output of his heat exchanger reached the maximum. At the time I concluded that this must have occurred as a result of the filling of his device by liquid water. I chose 130 C for my latest calculations mainly as an estimate of the temperature within the ECAT modules. The higher pressure (39.2 psi absolute) was the value required to keep the liquid water in saturation with the vapor. Rossi is using a feedback system to control the heating of his modules and that requires him to operate each at a few degrees above the output temperature(102 C?) as a minimum. There is no guarantee that he regulates them at 130 C as I assumed, but that temperature was consistent with having a ratio of vapor volume to liquid volume of nearly 100 to 1. Of course I could have raised the ECAT temperature to get a larger ratio of flash vapor to liquid water at the output stream. Likewise, the ratio would drop if a lower temperature is assumed. The 130 C appeared to be near to his earlier design, and I had to choose something. Do you have a suggestion for a better temperature or pressure to assume? Dave
