Objectives Psychometrics Psychometric chart Examples in AHUs.

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Presentation transcript:

Objectives Psychometrics Psychometric chart Examples in AHUs

AHU

Adiabatic mixing Governing equation External heat =0!

Sensible heating

Dehumidification by Cooling

Real Dehumidification Process

Transport of saturated air tsurface < tdp Condensation Mold in a duct

Humidification hw Specific enthalpy of water added to system hg Specific enthalpy of saturated water vapor

Evaporative Cooling (air washing)

Condition Line for a Space

Systems: Single-Zone Air Systems Zone – any space with a thermostat

Air conditioning 13

Recirculation 14

Reheat 15

Evaporative Cooler 16