2011/8/6 Abd ul-Rahman Lomax <[email protected]>: > At 10:17 AM 8/5/2011, Jouni Valkonen wrote: >> >> Any probe that measures temperature in boiling water system measures >> also pressure. That is because boiling point of water is directly >> depended on pressure. > > Jouni, you can't see the forest for the trees. Sure, temperature will depend > on pressure. But pressure is not being measured by a temperature probe. > Rather, if we assume saturated steam and we know the temperate, and it's > saturated steam, yes, we can calculate the pressure.
No we do not need to assume anything. All what is needed is just to observe that boiler system is stable, and we get always steam with temperature exactly at boiling point of local pressure. If this is not the case, then we do not have steam at all and temperature is something below boiling or cooling is insufficient and temperature rises well above boiling and again is not stable. There is absolutely nothing in between, but either system is in the stable equilibrium at boiling point or it is not not. And if it is not, then it is very easy to observe. - Jouni
