This write‑up explains the science behind psychrometric calculations, the mathematical formulas required, step‑by‑step construction of an Excel calculator, practical applications, and advanced automation techniques. Before building the calculator, we must define the key properties of moist air, treating it as a mixture of dry air and water vapor.
[ RH = \fracp_wp_ws(T) \times 100% ]
(SI, kJ/kg dry air )
– requires iterative solution of the carrier equation: psychrometric chart calculator excel
=0.62198 * B6 / (B2 - B6) Cell B8:
– solved iteratively from ( p_ws(T_dp) = p_w ). the mathematical formulas required