Psychrometric Basic Data Input
Barometric pressure  
Actual press (psia)
Actual press (In. Hga.)
Input Data  
RH (%)
Wet Bulb (℉)
Dew Point (℉)
Dry Bulb Temperature
Wind Speed Mph  

Psychrometric Chart Properties
Barometric Pressure psia
Dry Bulb Temperature
Wet Bulb Temperature
Dew Point
Enthalpy Btu/lb DA
Enthalpy Btu/lb
Relative Humidity %
Absolute Humidity lb H2O/lb DA
Absolute Humidity lb H2O/lb
Specific Volume ft3/lb DA
Specific Volume ft3/lb
Density lb/ft3 DA
Density lb/ft3

Other Thermodynamic Properties
Specific Humidity lbH2O/ft3
Degree of Saturation %
Specific Heat-Isobaric Btu/lb R
Specific Heat-Isometric Btu/lb R
Specific Heat-k Btu/lb R
Entropy Btu/lb R
Gas Constant ft-lbf/lbm-R
Compressibility Factor  
Sensible Enthalpy Btu/lb
Latent Enthalpy Btu/lb
Mole Fraction Dry Air %
Molecular Weight  
Wind Chill
Speed of Sound ft/sec


1. 개 요

     본 프로그램은 습공기물성치로서 주어진 상대습도/습구온도/이슬점과 건구온도에
     따른 습공기(공기+물)의 27가지 열역학 물성치를 계산함.

2. 기 능

     RH (%), Wet Bulb Temperature(℉), Dew Point (℉) 중 1개와 Dry Bulb
     다음 27가지 열역학 물성치를 계산함

     - Barometric Pressure [psia]
     - Dry Bulb Temperature [℉]
     - Wet Bulb Temperature [℉]
     - Dew Point [℉]
     - Enthalpy [Btu/lb DA]
     - Enthalpy [Btu/lb]
     - Relative Humidity [%]
     - Absolute Humidity [lb H2O/lb DA]
     - Absolute Humidity [lb H2O/lb]
     - Specific Volume [ft3/lb DA]
     - Specific Volume [ft3/lb]
     - Density [lb/ft3 DA]
     - Density [lb/ft3]
     - Specific Humidity [lbH2O/ft3]
     - Degree of Saturation [%]
     - Specific Heat-Isobaric [Btu/lb R]
     - Specific Heat-Isometric [Btu/lb R]
     - Specific Heat-k [Btu/lb R]
     - Entropy [Btu/lb R]
     - Gas Constant [ft-lbf/lbm-R]
     - Compressibility Factor
     - Sensible Enthalpy [Btu/lb]
     - Latent Enthalpy [Btu/lb]
     - Mole Fraction Dry Air [%]
     - Molecular Weight
     - Wind Chill [℉]
     - Speed of Sound [ft/sec]

3. 제작근거

     ANSI/ASHRAE 41.6-1994 기준

4. 제한사항

     다음 온도와 대기압근처의 습공기에 대해서만 사용가능

     -49℉ <= Dew Point <= 200℉
     -148℉ <= Dry Bulb Temperature <= 392℉
     -148℉ <= Wet Bulb Temperature <= 392℉