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pv is the partial pressure of water vapor
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p is the pressure
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Moisture content xvap.
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Vapor mass fraction omega_moist.
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Relative humidity phi. This variable corresponds to the calculated φ with the system temperature and pressure.
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Saturation indicator satInd; this indicator is set to 1 if saturation has been detected (φ = 1) and 0 if not.
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ht.feature.fc(RH,T, pA), where RH is the relative humidity , T is the temperature (SI unit: K), and pA is the pressure (SI unit: Pa). It returns the corresponding water vapor concentration (SI unit: mol/m3) by deriving the following relation from Equation 4-139, Equation 4-142, and Equation 4-146:
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ht.feature.fxvap(RH, T, pA), where RH is the relative humidity , T is the temperature (SI unit: K) and pA is the pressure (SI unit Pa). It returns the moisture content (SI unit: 1) by using the following relation:
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ht.feature.fpsat(T), where T is the temperature (SI unit: K). It returns the saturation pressure (SI unit: Pa) by using Equation 4-143.
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ht.feature.Lv(T), where T is the temperature (SI unit: K). It returns the latent heat of evaporation (SI unit: J/kg) as a linear interpolation of the data from Ref. 38, which provides steam properties based on the Industrial Formulation IAPWS-IF97. The temperature-dependency is as shown on Figure 4-22.
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