Another question is whether there was a feed water pump that would maintain a constant pressure on the flow meter and a full meter no matter what the orientation.
I would think such a system would require a constant flow and heat transfer coeff. for the heat exchangers to maintain stability. There may also be an orifice to assure constant flow. A flow diagram of the system should be in hand before concluding issues about flow. Bob Cook ________________________________ From: Bob Higgins <[email protected]> Sent: Monday, August 8, 2016 7:57 AM To: [email protected] Subject: Re: [Vo]:Problems with Rossi's flow meter described in court document What I meant is that the flow axis (also the turbine propeller axis) should be vertical to insure that the flow tube (housing the turbine) is fully filled. I believe such turbines have a rotor (like a propeller) with an axis coaxial with the flow tube and low blockage spider supports for the rotor shaft. Then there is an electrical or mechanical coupling of the rotor rotation to measure the flow speed usually out the side of the flow tube. If the flow tube were mounted horizontally and the pipe was half full, to first order it would indicate twice the flow as actual. Second order effects have to take into account the turning resistance of the turbine, which is usually very low. Again, the turbine is measuring the speed of the flowing medium whether it is full or not (to first order). On Mon, Aug 8, 2016 at 8:40 AM, Jed Rothwell <[email protected]<mailto:[email protected]>> wrote: Bob Higgins <[email protected]<mailto:[email protected]>> wrote: Do you know the orientation of the flow meter? It is only possible to have a pipe half full if the flow meter is mounted horizontally (a mistake for use of this type of flow meter). Umm . . . I don't follow what you mean. Do you mean the pipe should be vertical? I don't know what you mean by having the flow meter vertical. Like, sideways? It is a rotor smack in the middle of the pipe . . . so I don't get what you mean. The pipe was horizontal and the flow meter face plate is up. As far as I know. If the flow meter was mounted horizontally, and the pipe was half full, the turbine would turn at the speed of the water (same as if it were full) - since a full pipe was presumed in the indication of rate, it would be in error by the volumetric difference between the pipe full volume and the pipe partly filled volume. I believe the error can be complicated. It is not like: "the pipe is half full so the actual flow rate is half of what is indicated." A partially full pipe can produce a huge error. That is my impression reading about flow meters and using them myself, but I have no specific information on the extent of the error in Rossi's setup. (I think I.H. does have this information.) As you saw, I estimated it has to be at least 3. That seems plausible to me. - Jed
