This program computes the thermodynamic properties of moist air for various conditions of barometric pressure, dry bulb temperature, and wet bulb temperature, based on the general format developed by the National Bureau of Standards.

Program Notes:

The inputs required are:
-Barometric pressure in inches of mercury (29.921 standard for air).
-Dry bulb temperature (degrees Fahrenheit).
-Wet bulb temperature (degrees Fahrenheit).

Downloads:

basic program (liberty basic) lbtpa.bas

Test Case:

Example:
Compute the thermodynamic properties of air which has the following characteristics:
-Dry bulb temperature80°F.
-Wet bulb temperature 70°F.
-Barometric pressure29.921 in. of mercury.

THERMODYNAMIC PROPERTIES OF AIR


BAR PRESSURE (INCHES HG) = 29.921
DRYBULB TEMP (DEGF) =      80
WET BULB TEMP(DEGF) =      70


DEW POINT TEMP (DEGF) =      65.4128894
VAPOR PRESSURE (INCH HG) =   0.63199435
HUMIDTY RATIO  (#WAT/#AIR) = 0.13421435e-1
VOL MOIST AIR  (FT^3/#) =    13.8933351
ENTHALPY       (BTU/#)=      33.916872
REL HUMIDITY   (PERCENT)=    61.2235885

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