Thermexcel Programme Psychrosi (2026)

For evaporators below 0°C, Thermexcel includes a frost growth model (empirical) but does not simulate cyclic defrost. Users must manually iterate with frost thickness limits.

One critical insight from ThermExcel simulations is that after intense psychrosi, air leaves nearly saturated at a low temperature (e.g., 12°C, 95% RH). This air cannot be supplied directly to a comfort zone because it feels drafty and clammy. Therefore, the model should include a reheat coil. thermexcel programme psychrosi

Using ThermExcel in series:

To model this:

The total energy cost is the sum of psychrosi (sensible + latent) plus reheat (sensible), which ThermExcel can compute automatically. For evaporators below 0°C, Thermexcel includes a frost

Design a chilled water cooling coil for an AHU (Air Handling Unit) in a tropical climate: To model this:

Below is a practical workflow for modeling a psychrosy process using ThermExcel functions.