On Fri, Dec 23, 2011 at 7:37 AM, David Roberson <dlrober...@aol.com> wrote:
> > I wonder if you could ask your source to explain the bump in the curve > that occurs at 16:00 on the second chart? It looks like this is not > demonstrated in any of his curves. The bump is in the temperature of the > ECAT water bath T2 and is very distinct. > Here is the reply: "If you are referring to the green curve T_2w, it is not a bump, it is a sharp angle. It appears when the water temperature reaches the boiling point correspondent to the pressure inside the ecat. From that point on, the water temperature no longer rises due to evaporation. That pressure includes an over pressure due to the relief valve, which has been supposed to be 0.8 bar. That's the point where the T_2w deviates more from the measured value T2(mis), for the rest of the time difference is less than 5°C. Also, consider that the thermocouple was placed between the fins of the heat exchanger and remains above the water for the first part of the transient. In addition, the internal pressure in the ecat, and hence the temperature, can change depending on the steam/water outflow. These phenomena are not included in the model."
