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Examples

MoistAirTab™ Example 1 - Moisture Content

Moist air exists at a dry-bulb temperatuer of 40°C and a wet-bulb temperature of 20°C at standard atmospheric pressure.

The solution is presented below as a table generated from Excel. The gray shaded areas represent the input data.

Input Conditions	Units
Dry bulb temperature	°C	40
Wet bulb temperature	°C	20
Total pressure	bar	1.01325

1. Expressions of Moisture Content:
Relative humidity	%	14.01%
Humidity ratio	kg_w/kg_{dry air}	0.006448
Dew point temperature	°C	7.4829
Water mole fraction		0.0103
Water weight fraction		0.0064
Parital pressure of water	bar	0.0104

2. Thermodynamic Properties of Moist Air
Enthalpy	kJ/kg_{dry air}	56.856
Entropy	kJ/(kg_{dry air}.K)	0.200
Volume	m³/kg_{dry air}	0.896