Hello everyone.. I saw some examples of Rankine cycle where the boiler heats the water at constant pressure so that it's stay in one pressure line as in the temperature-specific volume diagram or temperature-entrophy diagram. Is it a must to heating at constant pressure? Is pressure of fluid normally constant while we're heating it? or does it require some method to keep it constant?
Also, what's the different between normal vapor and superheated vapor?
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