Using total enthalpy vs. sensible enthalpy. ThermExcel defaults to total enthalpy (kJ/kg dry air). Ensure your coil selection software uses the same reference state (0°C liquid water as zero enthalpy).
ThermExcel Programme PsychroSI, developed by Jean Yves MESSE, is a specialized HVAC software tool for calculating thermodynamic properties of moist air and modeling air treatment processes in SI units. It provides detailed calculations for parameters such as dry-bulb temperature, relative humidity, and enthalpy. Detailed documentation is available at Scribd . ThermExcel - Programme PsychroSI | PDF | Humidité relative
Managing air saturation in environmental control facilities. Présentation du programme PsychroSI - ThermExcel thermexcel programme psychrosi
The absolute moisture content (kg water/kg dry air). This is the cornerstone of all psychrosi calculations. The programme uses the exact vapor pressure formula: ( W = 0.62198 \times \fracP_vP_atm - P_v ).
In industrial settings—such as pharmaceutical manufacturing, food processing, or indoor swimming pools—humidity control is more critical than temperature control. The program allows engineers to calculate the Dew Point accurately, ensuring that surfaces within the facility remain above this temperature to prevent condensation, mold Using total enthalpy vs
Controlling misting systems for market gardening.
Designing outdoor cooling systems and misting for large public spaces. Ensure your coil selection software uses the same
Using Excel’s "What-If Analysis" data table, you can link ThermExcel functions to create a matrix of psychrometric properties. For example:
Unlike online calculators that offer static results, ThermExcel integrates directly into the spreadsheet environment, allowing for dynamic, iterative calculations across thousands of rows of data.