Psychrometric Table Link

A psychrometric table is a fundamental tool used in HVAC (Heating, Ventilation, and Air Conditioning), meteorology, and industrial process control. It provides the physical and thermodynamic properties of moist air without requiring complex calculations or the ability to read a psychrometric chart.

The lowest temperature achievable by evaporative cooling (sloping lines). psychrometric table

| DBT (°C) | RH (%) | WBT (°C) | W (g/kg) | h (kJ/kg) | v (m³/kg) | T_dp (°C) | |----------|--------|----------|----------|-----------|-----------|-----------| | 25.0 | 50 | 18.2 | 9.92 | 50.3 | 0.857 | 14.0 | | 25.0 | 60 | 19.6 | 11.90 | 55.4 | 0.861 | 16.7 | | 30.0 | 50 | 22.5 | 13.25 | 63.8 | 0.876 | 18.6 | A psychrometric table is a fundamental tool used

| DBT (°C) | RH (%) | W (g/kg) | h (kJ/kg) | v (m³/kg) | T_dp (°C) | WBT (°C) | |----------|--------|----------|-----------|-----------|-----------|----------| | 20.0 | 40 | 5.86 | 34.9 | 0.835 | 6.0 | 12.0 | | 20.0 | 50 | 7.35 | 38.7 | 0.840 | 9.3 | 14.0 | | 20.0 | 60 | 8.86 | 42.6 | 0.845 | 12.0 | 15.7 | | 25.0 | 40 | 7.95 | 45.2 | 0.854 | 10.5 | 16.1 | | 25.0 | 50 | 9.92 | 50.3 | 0.857 | 14.0 | 18.2 | | 25.0 | 60 | 11.90 | 55.4 | 0.861 | 16.7 | 19.6 | | 30.0 | 40 | 10.60 | 57.2 | 0.873 | 15.0 | 20.5 | | 30.0 | 50 | 13.25 | 63.8 | 0.876 | 18.6 | 22.5 | | 30.0 | 60 | 15.90 | 70.6 | 0.881 | 21.4 | 24.0 | | DBT (°C) | RH (%) | WBT

(iterative solution): [ p_w = p_ws(T_w) - P \cdot (T - T_w) \cdot \fracc_p,mh_fg \cdot \textLe^2/3 ] For air-water vapor, ( \textLe^2/3 \approx 1 ). The psychrometric constant depends on barometric pressure.

While printed psychrometric tables are still found in handbooks, modern practice uses: