Further review of the Celani experiment documentation located at http://lenr-canr.org/acrobat/CelaniFcunimnalloa.pdf has revealed additional information that I would like to have the vortex discuss. The performance of this device in a public demonstration where it shows excess heat due to LENR activity has gotten my attention and I hope that others of the group will take a closer look at the documentation.
It would be beneficial to all of us if Celani would release the supporting data and I hope that is within his plans. Is anyone aware of when this might happen? I observed the graph on page 47 in an attempt to gain time domain response information to use in evaluating the power output performance and make predictions. If you look at this particular chart, you can see that it is expanded in time so that each horizontal division is 500 seconds long which is short compared to the other charts supplied. Also, the power is step applied to the inactive wire during this period and the glass temperature is recorded. The green curve representing the glass outer temperature rises smoothly and appears to follow an exponential curve. This is useful information since it suggests that any heat released by LENR processes will be filtered heavily before it shows up on the power graph. I estimate that the rise time of the green curve is about one horizontal division which is 500 seconds. If you take the time constant of 500 seconds and invert it you get a frequency of .002 radians per second. Turn this into hertz and you get .002 / 2 / pi = 3.18 E-4 Hertz. Any drive waveform will find itself subjected to this effective substantial low pass filter before it is detected as external glass heating and thus radiation. For instance, if an LENR effect generated 100 watts for 5 seconds before being quenched, it would be filtered quite well and appear as a power pulse far lower in power, perhaps 10 watts. I need to do further simulations to be confident in the actual power displayed versus present for support. With this new information in mind I took a further look at the chart on page 31. The first thing to notice is that each horizontal division is 50,000 seconds or 100 filter time constants. That fact will ensure that any pulses filtered by the time constant of the system will occur within a short span along the x axis. The shape of the excess power curve is strongly suggestive of a process that releases large impulsive heat spikes that are typically close together in time, but that separation varies quite a bit during the testing. Without the detailed supporting data we can not be sure of just how long each pulse typically lasts or how large an excursion it takes. If a large number of impulses arrive closely in time we would observe a relatively smoothly rising total curve that does not have much fuzz (ripple) visible. As the pulses arrive further apart, the ripple will increase and if long enough time is allowed between pulses the bottom of the curve will rapidly head toward zero power output. The curve offers plenty of examples of these effects to follow if you take the effort to view it. It has been my hypothesis for a while that there is a strong positive feedback mechanism responsible for the impulses that show up in the excess power. I express the mechanism more of less as follows: A differential quantity of heat is released within a NAE as a result of LENR activity. This heat flows through the thermal resistance in the local area and results in a differential elevation in temperature. Now, the tiny rise in temperature then leads to an increase in released LENR heat that is larger than the initial release. This process continues in a self sustaining exponential rise in local temperature and heat release until something quenches the process. Perhaps melting of the region occurs as a brake. Further research must be conducted if we are to understand exactly what happens, but once the process no longer is under the influence of positive feedback the temperature rapidly returns to the relaxed value. Positive feedback processes on many occasions occur with very short time constants depending upon the local parameters. In this situation I suspect that the impulses last for just a few seconds due to the general shape of the excess power curve. Had the time frame of the activity been in the hundreds of seconds, the curve most likely would have been smooth. What I am seeing within Celani's report is exciting and I think we should all look into it in detail since it appears to demonstrate LENR activity at high power levels and appears to be based upon good science and the information open to review. Others in our field tend to keep details secret and in many cases mislead us altogether. One day I hope that the other groups will behave in a more scientific mode. Let me know privately if desired whether or not my reviews are of use to other members of the vortex. At times it seems that no one responds and I hate to keep taking up bandwidth of the organization if it is to no purpose. Dave
