Obviously I meant to write: . . . you can feel the OUTLET is substantially warmer than the INLET. . . .
I meant in the 18-hour test with flowing liquid water. As described here: http://www.nyteknik.se/nyheter/energi_miljo/energi/article3108242.ece . . . the inlet was tap-water temperature, around 15°C and the outlet was around 20°C for most of the test, and for a while it was 40°C. It is very easy to confirm that these temperature difference are real, and not an instrument artifact or caused by fake instruments. Of course you cannot tell if the outlet is 35°C or 45°C, but you can tell it is much warmer than the inlet, and the input power would only make it a fraction of a degree warmer. People who imagine it is impossible to visually confirm that the flow rate is about 1 L/s, and not -- say -- 10 times less or 100 times less have no experience doing experiments, plumbing, or working with ornamental ponds. - Jed
