Equivalent Temperature
Equivalent Temperature :
Equivalent Temperature is the temperature of an air parcel from which all the water vapor has been extracted by an adiabatic process. Air contains water vapor that has been evaporated into it from liquid sources (lakes, sea, etc.. The energy needed to do that has been taken from the air. Taking a volume of air at temperature T and mixing ratio of r , drying it by condensation will restitute energy to the airmass. This will depend on the latent heat release as: T_e \approx T + \frac {L_v} {c_{pd}.}.r \,L_v : latent heat of evaporation (2400 kJ/kg {at 25C}. to 2600 kJ/kg {at -40C}.) \,c_{pd}. : specific heat at constant pressure for air (\approx 1004 J/(kg•K)) Tables exist for exact values of the last two coefficients. An OSH glossary used in safety and health at work which is, adopted by ILO {102}. The term definition has been obtained from the secondary source
