TheHVACLab Energy Solutions β Psychrometric Analysis Report
Air State Inputs
Dry-bulb temperature & relative humidity
Β°C
%
Constants β ASHRAE Fundamentals
Atmospheric Pressure101.325 kPa
Dry Air Cp1.006 kJ/kgΒ·K
Water Vapour hfg2501 kJ/kg
Water Vapour Cp1.86 kJ/kgΒ·K
Sat. Pressure Eq.Buck (1981)
Air Properties Results
Wet Bulb
β
Β°C
Dew Point
β
Β°C
Humidity Ratio W
β
kg/kg dry air
Enthalpy h
β
kJ/kg dry air
Specific Volume
β
mΒ³/kg dry air
Air Density
β
kg/mΒ³
h = 1.006Β·T + WΒ·(2501 + 1.86Β·T) Β· W = 0.62198Β·ΟΒ·Pws / (P β ΟΒ·Pws)
AHU Operating Conditions
Return air Β· Supply air Β· Airflow
Airflow
CFM
Return Air
Β°C
%
Supply Air
Β°C
%
Thermal Load Summary
Total Load
β
kW
Total Load
β
TR
Sensible Load
β
kW
Latent Load
β
kW
SHR
β
Sensible Heat Ratio
Condensate
β
kg/hr
ΞT
β
Β°C
Ξh
β
kJ/kg
Return Air State
WB (Β°C)β
DP (Β°C)β
W (kg/kg)β
h (kJ/kg)β
Supply Air State
WB (Β°C)β
DP (Β°C)β
W (kg/kg)β
h (kJ/kg)β
Q_total=αΉΒ·Ξh | Q_sens=αΉΒ·1.006Β·ΞT | Q_lat=αΉΒ·2501Β·ΞW | 1 TR = 3.517 kW
Ventilation & Mixing Inputs
Return air + fresh air mixing
Airflow
CFM
Fresh Air Fraction
%
Return Air Conditions
Β°C
%
Fresh Air Conditions
Β°C
%
Mixed Air Conditions
Return Air
β
CFM
+
Fresh Air
β
CFM
β
Mixed Air
β
CFM
Mixed DB
β
Β°C
Mixed WB
β
Β°C
Mixed RH
β
%
Enthalpy h
β
kJ/kg
Dew Point
β
Β°C
Hum. Ratio W
β
kg/kg
Ξh Mixing Penalty
β
kJ/kg β additional enthalpy vs return-only
T_mix=(αΉ_raΒ·T_ra + αΉ_faΒ·T_fa)/αΉ_total | W_mix=(αΉ_raΒ·W_ra + αΉ_faΒ·W_fa)/αΉ_total
Psychrometric Chart β Moist Air at 101.325 kPa
Points auto-update with your calculations Β· Hover for state details
Air Properties
Return Air
Supply Air
Fresh Air
Mixed Air
Saturation 100%
DB 35.0Β°C
WB β
h β
W β
P_atm: 101.325 kPa Β· ASHRAE Fundamentals
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