HVAC - Dew Point Approximation
Dew point of moist air from ambient temperature and relative humidity using Magnus formula - the basis for condensation check.
Dew-point temperature
19.1°C
Formula, assumptions, and limits
Magnus coefficients a = 17.625, b = 243.04 °C. If cargo-tank plating temperature falls below dew point → condensation risk. Cargoes with critical moisture (steel coils, paper) need dry-cargo dehumidification.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Relative humidity | % | hygrometer | |
| Air temperature | °C | thermometer |