Objectives Psychometrics Psychometric chart Examples in AHUs.

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Presentation transcript:

Objectives Psychometrics Psychometric chart Examples in AHUs

Condition Line for a Space

AHU

Sensible heating

Dehumidification by Cooling

Real Dehumidification Process

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

Evaporative Cooling (air washing)

Adiabatic mixing Governing equation External heat =0!

Mold in a duct tsurface < tdp Condensation

Air conditioning 12

Recirculation 13

Reheat 14

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

Evaporative Cooler 16