Psyd wrote:If a 100C turns off at 112C, and we assume that the water is also at 112C as this page claims that it is, what temp does the 110C t-stat turn off at?
My intention to make the measurements, kindly shown earlier by japa-fi, was to get some insight feeling, how the actual temperature of the water reacts. After reading the many reports, I was somewhat baffled.
I suspected that most of them were made with 110 V Silvia as the comparisons of cycle times to Jim Gallt's measurements were quite different. Then I found out that there indeed is a big difference with powers 800 W / 110 V vs. 1100 / 230 V
The measurements of the idle Silvia shown in the picture showed that the measurement from the top of the boiler were giving the water temperature quite correctly at the end of the cooling cycle, where it took 70-80 seconds for the temperature to change with 1 degC.
But, during the heating stage the temperature with the 230 V model increases with ca. 0.6 degC per second, and the wall of the boiler induces a lag to the temperature. The heat was switched off by the thermostat as the boiler surface temperature was around 112 degC (those values were quite constant, but some other tests have shown also more variance).
After that the boiler surface temperature increased 10 degC during a minute, which I concluded to be due the thermal lag of the boiler wall. The temperature falls at the top level 2 degC, which would mean that the boiler water temperature at the time of switching off would be around two degrees higher than shown on the surface.
The impact of steam hadn't occurred to me, which might change the the situation. However, wouldn't the temperature still be constant, until we would reach to the superheated region?
I do hope I am able to have my web pages on coffee in English as well.
(ed. 12/31/07 Now they are also in English