Regarding adiabatic saturation temperature and dew point temperature
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Regarding adiabatic saturation temperature and dew point temperature, is there any conceptual connection between the two? Why do textbooks state that the adiabatic saturation temperature of a gas (air) at a certain humidity is always ≥ the dew point temperature? Right or wrong, free discussion... I hope the experts on this forum will be kind enough to share their insights.
Personal understanding: The transition from the liquid phase to the gas phase requires heat absorption in order to vaporize, or a two-phase state of gas and liquid can coexist
Thank you for the explanation, but I still don’t quite understand it. Can it be understood that, for a given pressure, in a wet gas containing specific components, the lowest temperature in the gas-liquid coexistence region on the phase diagram is the bubble point temperature, while the highest temperature is the dew point temperature? Based on physical meaning, where should the adiabatic saturation temperature be located in the phase diagram?
I understand that the initial stage when the gas phase begins to transform into the liquid phase is considered the dew point; while the adiabatic saturation temperature is reached when the gas and liquid phases are in complete equilibrium. At this point, some vaporization occurs alongside some condensation, and with constant heat input, a balance is achieved between the gas and liquid phases. The bubble point of the liquid phase is thus equal to the dew point of the gas phase