GE HumiLab User Manual

Page 68 Appendix D — Humidity Equations and Conversion
Appendix D — Humidity Equations and
Conversion Charts
Introduction
The equations and charts in this appendix are supplied for users
who are interested in more information about the relationships
between vapor pressure, humidity, temperature, and dew point.
Symbols used
e = Vapor Pressure, millibars
e
i
= Vapor Pressure with respect to ice, millibars
e
w
= Vapor Pressure with respect to water, millibars
e
is
= Saturation vapor pressure, ice, millibars
e
ws
= Saturation vapor pressure, water, millibars
P = Total Pressure, millibars
T = Temperature, ºC
T
a
= Ambient temperature, ºC
T
d
= Dew point temperature, ºC
T
f
= Frost point temperature, ºC
Vapor pressure
Saturation vapor pressure with respect to water is a function of
temperature only and is given by the following:
e
ws
6.1121
17.502 T
240.97 T +
-------------------------
exp=

GE HumiLab Specifications

General

Brand	GE
Model	HumiLab
Category	Portable Generator
Language	English