Small addition, this 6kW figure is minimum possible heating power. We have also empirical way for calculating total enthalphy, that gives higher value than 6 kW. If it is assumed that E-Cat was full of water when 1.2kW heating element was turned on, then 1.2kW was enough to cause ΔT to be 20°C in 30 minutes. This means that during the 6min power surge heating power was 10 × 1.2kW = 12kW.
If it is assumed that E-Cat was not full of water when power was turned on, then heating power during the power surge was even more than 12kW. However I think this unlikely, because steam overperssure was only 100 kPa and this is difficult to explain even for 12 kW heating power. 100kPa overpressure should be more close for 6-9 kW heating power. –Jouni 2011/8/31 Jouni Valkonen <[email protected]>: > 2011/8/30 Jed Rothwell <[email protected]>: >> Jouni Valkonen wrote: >> >>> Ps. I do not know what model of E-Cat we are talking about. Does we have >>> pictures? Or is it just some mythical test what was seen by nobody. >>> >> >> The 15 minute heat-after-death event was with the large eCat used in the >> January and February tests. This produces 12 kW to 16 kW output (depending >> on how you measure it) with about 400 W input. As far as I know, this is the >> only eCat that Levi et al. tested in December, which is when the event >> occurred. The flow rate was typically ~300 ml/min I believe. >> > > Ah, now I know exactly what is going on. > > Here is the premilinary report (Test1): > http://22passi.blogspot.com/2011/01/report-ufficiale-esperimento-della.html?m=1 > > Ok, I am amazed how far from reality Joe was, because it was > impossible try to make proper conclusions in what test he was > referring. > > But anyways, it is now very clear. > > –Input power was turned on 16.55 and it was around 1200 Watts. > –This caused slight temperature rise during first 30 minutes.(ΔT 20°C) > –After that reaction partially ignited and temperature rose to 60°C. > This took about 20 minutes > –Then full ignition happened 17.50. Temperature rose quickly to > 101.6°C and steam overpressure was ca. 100 kPa. > –Then the power was cut 10 minutes later and reactor still continued > producing steam for 15 minutes > –Finally reactor was shut down 17.15 by increasing water flow > > We do not have good data what was the momentary output power during > the 10minute powersurge. Also, in order to make any calculations, we > should have some information how much E-Cat can store liquid water > inside. > > However, as the temperature stayed over 100, it means that there was > some steam production. We do not know exactly how much, because there > was visible temperature drop after power was cut and this means that > steam overpressure decreased somewhat from that 100kPa, in the > self-sustaining mode. Therefore total heating power in self-sustaining > mode was at least 3 kW, probably more. But what is important is that > there was not visible decreasing of heating power during the 15 min > self-sustaining mode and it was artificially cancelled by shutting > down the reactor. Therefore it is fair to assume, that it would have > continued indefinitely without shutting down the self-sustaining mode. > > Also as we know that the volume of reactor chamber was ca. 1 liter, > therefore the maximum metal mass for storing thermal energy was > probably 5 kg. Same logic applies here that only the reactor chamber > can store residual heat energy.Therefore rest of the E-Cat can be > ignored, because it does not exceed significantly 100°C. > > Also some estimations about what was the total heating power during > the 10min powersurge. We know that in that time, inside E-Cat, there > was at least 10 kg of water. Therefore total heating power during 6min > power surge was 4.6kW (water stored inside the E-Cat) + 1.5kW (cool > water flux) + 1.0kW (metal components of E-Cat) = _6kW_, in order to > rise ΔT by 40°C in 6min. > > This is also the most likely excess heating power of December E-Cat, > i.e. 4.7kW excess heat was produced for 25 minutes. > > In summary, water flow was 14 kg/h, core mass was 5kg, heating power > in self-sustaining mode was 3-5kW (but it was constant). Max core > temperature 1000°C. > > –Jouni >
