Abd, The answer to the question "why there aren't any isothermal curves in the phase change area?" is exactly the consequence of your experiments with the steam calculator: at constant pressure the temperature does not change. So if you change one the other follows linearly.
If you look on Wikipedia you will find diagrams which approximate the phase change with higher accuracy and you will see that isotherms are not exactly parallel to isobars, the difference is tiny. If to the e-cat could be applied the Mollier diagrams as if it were a steam boiler the results would confirm a dry steam. But is the e-cat a steam boiler? mic mic Il giorno 06/ago/2011 04:50, "Abd ul-Rahman Lomax" <a...@lomaxdesign.com> ha scritto: > At 04:55 PM 8/5/2011, Michele Comitini wrote: > >> > >> > >> <http://www.engineeringtoolbox.com/mollier-diagram-water-d_308.html> http://www.engineeringtoolbox.com/mollier-diagram-water-d_308.html >> shows a Mollier diagram, but I see no way to >> use this diagram to determine steam quality. >> > >>Dear Abd, >> >>I use like this: >>Take the isobaric curve; >>Find intersection with temperature. >>Now you can read the steam quality using the closest red curve. >>If you need more precision you can read the >>enthalpy on the left and you can find the mass >>of vapour and water in a unit of volume by algebraic calculation. > > Great. Isobaric curve for 1 bar. Intersects the > tempurature curve at 100 C. Steam quality 100%. > What does this mean? That all steam at 100 C and > 1 bar is 100% dry? The temperature lines do not go below 100%, anywhere. > > >>As for the steam tables they are everywhere. If >>you want to play with steam go here :Â >><http://www.steamtablesonline.com/>http://www.steamtablesonline.com/ > > I looked at the calculator there and found that > the pressure/temperature relationship did not > change with a change in steam quality. Steam > quality affects the enthalpy, drastically. >
