Trane trg-trc001-en Air Conditioner User Manual


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TRG-TRC001-EN 37
notes
period five
Tons of Refrigeration
The psychrometric chart can also be used to determine the total load on the
refrigeration equipment, expressed in Btu per hour or tons of refrigeration.
One ton equals 12,000 Btu/hr.
Another property of air, enthalpy, must now be defined. Enthalpy describes the
total amount of heat energy, both sensible and latent, in one pound of air at its
present condition. It is expressed in Btu per pound of dry air (Btu/lb). When
displayed in formulas, enthalpy is usually designated as
h
.
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