Just so my answer is not mistaken, let me say that the MFMP replica will be exactly the same size as the Lugano hotCat. It will have convection fins on the outside of the convection tube just like the Lugano hotCat.
Ryan Hunt of HUG has made excellent progress in casting the convection surface with a high alumina casting cement. The Lugano hotCat had a small inner alumina reaction tube that contained the LENR reactants. This tube had a 4mm ID and an estimated 6mm OD. If the Lugano analysis was correct, then roughly 910W of heat was being input in a heater coil around this reaction tube, and since a COP of 3.6 was calculated, then (3.6-1)(910) = 2366W was being produced in the small internal core by LENR reaction. The MFMP is trying to replicate the heat production of the assembly by having a core heater coil to model the LENR output and a large heater coil embedded in the convection tube assembly to model the electrical input to the hotCat heater. The small diameter coil that Alan Goldwater is building will go inside the convection (dogbone) assembly that Ryan Hunt is making. The total amount of electrical input needed for this dummy run (sum into the 2 heater coils) will be (910)(3.6)=3.28kW. This is a LOT of power for these small coils. The power per unit area of the wire is a metric used in design of heater coils. Normally Kanthal heaters want to run in the 5-10W/cm^2 range for long life. We may be running in the 20-30W/cm^2 range and at the extreme high temperature limit of Kanthal. It is not going to last very long above 1200C. We hope it will get to 1400C before the coils burn out, but we will be taking data in small steps of temperature until we get there, so even if it burns out, we will have data supporting or negating the Lugano result. The design work MFMP also goes to show that if the Lugano hotCat was actually operating at 1400C for weeks that it must use a refractory heater technology such as moly silicide or SiC (good research by Bob Greenyer). Both of these heater types have large swings in electrical resistance between startup and operating temperature (consistent with Rossi wanting to be part of controlling the input power as it comes up to temperature so as not to burn out the heater). These heater technologies only supply about 1kW in the size of the heater coil portion of the hotCat. So, if the output temperature really was 1400C range, and the Lugano calculations were correct about the heat output being 3.28kW, then the heat could not have been coming all from the heater input - these heater types simply are not capable of producing all of that heat. Because the MFMP test will use all electrical input in the replica to produce the heat, when the infrared response of the replica is matched in the Optris camera between the MFMP test and the Lugano test (regardless of the temperature), then the MFMP replica input heat to get that match IS the total heat being produced by the Lugano hotCat. MFMP will not need to compute the convection and radiation heats because the output heat will be equal to the measured input electrical power (we know we have by definition a COP=1). The test will have thermocouples, so we will see what actual temperature the Lugano Optris reading corresponded to as a secondary data result. On Mon, Dec 8, 2014 at 12:27 AM, Alain Sepeda <[email protected]> wrote: > Is it really the same size, If I read well the diameter' is much smaller, > making much less radiative surface to dissipate heat ? >
