GetDegreeOfSaturation {psychrolib}

Return the degree of saturation (i.e humidity ratio of the air / humidity ratio of the air at saturation at the same temperature and pressure) given dry-bulb temperature, humidity ratio, and atmospheric pressure.

Description

Return the degree of saturation (i.e humidity ratio of the air / humidity ratio of the air at saturation at the same temperature and pressure) given dry-bulb temperature, humidity ratio, and atmospheric pressure.

Usage

GetDegreeOfSaturation(TDryBulb, HumRatio, Pressure)

Arguments

TDryBulb

A numeric vector of dry-bulb temperature in degreeF [IP] or degreeC [SI]

HumRatio

A numeric vector of humidity ratio in lb_H2O lb_Air-1 [IP] or kg_H2O kg_Air-1 [SI]

Pressure

A numeric vector of atmospheric pressure in Psi [IP] or Pa [SI]

Value

A numeric vector of degree of saturation in arbitrary unit

Note

This definition is absent from the 2017 Handbook. Using 2009 version instead.

References

ASHRAE Handbook - Fundamentals (2009) ch. 1 eqn 12

Examples

SetUnitSystem("IP")
GetDegreeOfSaturation(80:100, 0.01, 14.175)

SetUnitSystem("SI")
GetDegreeOfSaturation(20:30, 0.01, 95461.0)