psychrometrics question
psychrometrics question
(OP)
so hvac is not my area, something i was thinking about:
so if water is under 212 F (boiling point) it is considered a subcooled liquid. however, that water can still evaporate into the air when its a subcooled liquid. does it evaporate only when its temp is above the dew point temp? i guess my main question is what is the difference between boiling and evaporation?
also, is evaporation pressure dependent?
so if water is under 212 F (boiling point) it is considered a subcooled liquid. however, that water can still evaporate into the air when its a subcooled liquid. does it evaporate only when its temp is above the dew point temp? i guess my main question is what is the difference between boiling and evaporation?
also, is evaporation pressure dependent?





RE: psychrometrics question
Yes, the same is true of boiling point, so boiling is easier to do in Denver, and at a lower temperature. You may wish to read: http://en.wikipedia.org/wiki/Boiling
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RE: psychrometrics question
RE: psychrometrics question
http://en.wikipedia.org/wiki/Relative_humidity.
So as long as the air is not saturated (100 percent relative humidity), water will continue to evaporate. You can saturate the air, this stopping evaporation, by increasing pressure, or by reducing temperature, or by simply allowing evaporation to continue (adding water vapor).
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RE: psychrometrics question
RE: psychrometrics question
Some psych charts have vapor pressure and the physics is simple if you look at the other stuff on the chart.