I want to discuss the temperature readings from Rossi's October demonstration. I think calling that experiment controversial is an understatement.
First of all, we are only given the temperature at the output of the device which as far as I know approximates the region above the internal water bath. Rossi does not give any information or measurement data about the core of his device so we have no idea what it is doing. He further complicates the measurements by placing some type of pressure release valve at the output after the bath. I consider this a parlor trick. Mats tried to blow air through the passage and found it obstructed, again pointing to a restriction. I wrote an interpretation of the data which is on their web site within which I found an excellent reason for the strange temperature behavior: Initially the core is hot when the input power is cut off to the ECAT. The measured ECAT temperature begins to fall slowly as we all expect until it reaches a flat region and then heads upward a few degrees until Rossi shuts down the system as it begins to fall again. Many folks seem to think that this means that the core has become hotter, but this is most likely not true. The volume above the water bath has become hotter after the dip, but I found a way to explain why this rise does not demonstrate extra core temperature rise. After the drive waveform has expired and the core reaches its maximum temperature, the ECAT generates a large amount of power which outruns the water pump as water within the bath is turned into steam. The extra vaporization shows up as elevated temperature and causes the water level within the bath to fall. The core temperature continues to drop until the pump can begin replacing water within the bath increasing the total volume of water held. We reach a flat region when the temperature has dropped sufficiently to reduce the violent boiling. Now the output temperature reads flat for some amount of time until the water bath fills completely thereby obstructing the output port. This obstruction forces the internal pressure and associated boiling temperature to rise within the bath. We see the rise in output temperature and equate it to a rise in core temperature. This is a conclusion that we reach assuming that there is nothing unusual about the setup, but it is not correct. This scenario explains all of the behavior witnessed during the October test and I believe that it is correct. So I conclude that there is no evidence of any unusual rise in the core temperature that suggests anything of a strange LENR nature. I am not saying that Rossi's device did not generate excess heat since I am convinced that it did, but only that the amount of heat energy was much less than I initially believed. The internal temperature has always dropped toward room in his experiments. >That is incorrect. It starts at room temperature and rises. During the 4-hour >run with no input, the temperature rose twice.< So Jed, I still believe that the temperature of the core was falling continuously during the Rossi demonstration and the rise you mention is an illusion similar to a magic trick. I see no reason to be concerned about the initial rise during this discussion. Dave
