![]() ![]() The fourth argument " propertyID" specifies which property to calculate, see the "Psychrometric Properties" table below.Wexler, ASHRAE Transactions, 89(2A) 520-535, 1983.įunction List in SI and E units - HumidAir Excel Add-In v3.1 # Function NameĪrgument 4 1 Humidair TdbRHPsi Humidair TdbRHPe Tdb RH P propertyID 2 Humidair TdbTwbPsi Humidair TdbTwbPe Tdb Twb P propertyID 3 Humidair TdbTdpPsi Humidair TdbTdpPe Tdb Tdp P propertyID 4 Humidair TdbWPsi Humidair TdbWPe Tdb W P propertyID 5 Humidair TdbHPsi Humidair TdbHPe Tdb H P propertyID 6 Humidair TdbSPsi Humidair TdbSPe Tdb S P propertyID 7 Humidair TdbVPsi Humidair TdbVPe Tdb V P propertyID 8 Humidair TwbRHPsi Humidair TwbRHPe Twb RH P propertyID 9 Humidair TwbTdpPsi Humidair TwbTdpPe Twb Tdp P propertyID 10 Humidair TwbWPsi Humidair TwbWPe Twb W P propertyID 11 Humidair TwbHPsi Humidair TwbHPe Twb H P propertyID 12 Humidair TwbSPsi Humidair TwbSPe Twb S P propertyID 13 Humidair TwbVPsi Humidair TwbVPe Twb V P propertyID 14 Humidair TdpRHPsi Humidair TdpRHPe Tdp RH P propertyID 15 Humidair RHWPsi Humidair RHWPe RH W P propertyID 16 Humidair RHHPsi Humidair RHHPe RH H P propertyID 17 Humidair RHSPsi Humidair RHSPe RH S P propertyID 18 Humidair RHVPsi Humidair RHVPe RH V P propertyID 19 Humidair WHPsi Humidair WHPe W H P propertyID 20 Humidair WSPsi Humidair WSPe W S P propertyID 21 Humidair WVPsi Humidair WVPe W V P propertyID Formulations for the thermodynamic properties of dry air from 173.15 K to 473.15 K, and of saturated moist air from 173.15 K to 372.15 K, at pressures to 5 MPa, R.Formulations for the thermodynamic properties of the saturated phases of H2O from 173.15 K to 473.15 K, W.The psychrometrics library uses the most accurate formulations of thermodynamic properties of moist air.įormulations are based on the study performed by Hyland and Wexler, and approved by ASHRAE (American Society of Heating, Refrigeration and Air-conditioning Engineers) as documented in the 1997 ASHRAE Handbook "Fundamentals". HumidAir Excel Add-In - Sample calculations in Excel The following figure shows a sample spreadsheet included in the download package. Call HumidAir functions from VBA (samples are included in the release version).Create User Defined Functions ( UDF) which use HumidAir functions.Developed in C++ for maximum speed, thoroughly tested for accuracy.License includes 32 bit and 64 bit version of the library.Based on the most accurate formulation (Hyland and Wexler).Professional quality, industrial strength software, proven in real world applications.The library is fully integrated in Excel, and available functions can be used in the same way as any other Excel function. It allows 21 different combinations of input variables to be used for calculations. The psychrometrics Excel Add-In library calculates 35 thermodynamic properties of humid (moist) air in SI and English units. ![]()
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