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Psychrometric diagram
Input data
Actual Temperature
Standard air ISA (15.5°C 1.225kg/m³)
Standard air AHRI (20°C 1.203kg/m³)
Density of moist air
Temperature + Pressure
Temperature + Altitude
Density of dry air
Temperature
°C
F
K
Barometric pressure
Pa
kPa
bar
psi
Density
kg/m³
kg/l
lb/ft³
lb/inch³
oz/ft³
Altitude
m
ft
yd
Wet bulb temperature
Absolute humidity
Relative humidity
°C
F
K
g/kg
oz/lb
%
Volumetric air flow
Mass flow of dry air
Mass flow of moist air
m³/h
l/h
l/s
GPM
ft³/m
ft³/s
kg/s
kg/h
lb/h
lb/s
kg/s
kg/h
lb/h
lb/s
Output data
Temperature of dry air
...
°C
F
K
Temperature of wet air
...
°C
F
K
Air density
...
kg/m³
kg/l
lb/ft³
lb/inch³
oz/ft³
Barometric pressure
...
Pa
kPa
bar
psi
Dew air temperature
...
°C
F
K
Absolute humidity
...
g/kg
oz/lb
Relative humidity
...
%
Enthalpy of dry air
...
J/kg
kJ/kg
cal/kg
kcal/kg
Partial vapour pressure
...
Pa
kPa
bar
psi
Specific hear of wet air
...
J/kg.K
kJ/kg.K
Specific volume of dry air
...
m³/kg
l/kg
Specific volume of wet air
...
m³/kg
l/kg
Air thermal conductivity
...
W/m.K
mW/m.K
Volumetric air flow
...
m³/h
m³/min
m³/s
l/h
l/min
l/s
ft³/h
ft³/min
ft³/s
Mass flow of dry air
...
kg/h
kg/min
kg/s
lb/h
lb/min
lb/s
Mass flow of moist air
...
kg/h
kg/min
kg/s
lb/h
lb/min
lb/s
General
Main Input
Main Output
Preferenced refrigerants
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Street
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Air
Fluid
Refrigerant
Coil
Default max values
Fluid PD
Fluid velocity
Air velocity
Pa
kPa
m/s
ft/s
m/s
ft/s
Fluid
Fluid
Evaporator
Condensator
Gas cooler
Requested Capacity
kW
kcal/h
BTU/h
Leaving Air temperature
°C
F
K
Entering air temperature - dry bulb
°C
F
K
Air Density
kg/m³
kg/l
lb/ft³
oz/ft³
lb/inch³
Pressure
Pa
kPa
bar
psi
Altitude
m
ft
yd
Volumetric flow
m³/h
m³/min
m³/s
l/h
l/min
l/s
ft³/h
ft³/min
ft³/s
Air mass flow
kg/h
kg/min
kg/s
lb/h
lb/min
lb/s
Face velocity
m/s
ft/s
Entering air temperature - wet bulb
°C
F
K
Entering air humidity
g/kg
oz/lb
Entering fluid temperature
°C
F
K
SuperHeated water Pressure
kPa
Pa
bar
psi
Density
kg/m³
kg/l
lb/ft³
lb/inch³
oz/ft³
Dyn Viscosity
Pa-s
Specific Heat
J/kg-K
Conductivity
W/m-K
Leaving fluid temperature
°C
F
K
Fluid flow
m³/h
l/h
l/s
GPM
ft³/m
ft³/s
Fluid mass flow
kg/h
kg/s
lb/h
lb/s
Requested fluid pressure drop
kPa
Pa
bar
psi
Coil length
mm
m
ft
inch
Maximum finned height
mm
m
ft
inch
Fin Spacing
mm
m
ft
inch
Inlet Gas Saturation Temperature
°C
F
K
Inlet Gas Pressure
kPa
Pa
bar
psi
Desuperheating
°C
F
K
Superheating
°C
F
K
Subcooling
°C
F
K
Requested Refrigerant Pressure Drop
kPa
Pa
bar
psi
Design Pressure PS
kPa
Pa
bar
psi
Cond. Temperature
°C
F
K
Inlet Enthalpy
J/kg
kJ/kg
cal/kg
kcal/kg
Inlet Gas Temperature
°C
F
K
Outlet Gas Temperature
°C
F
K
COEFF1_E1
COEFF2_E1
EXP_E1
Air
Fluid
Refrigerant
Coil
Temperature dry
°C
F
K
Temperature wet
°C
F
K
Altitude
m
ft
yd
Pressure atmosferic
Pa
kPa
bar
psi
Absolute humidity
g/kg
oz/lb
Relative humidity
%
X
Density
kg/m³
kg/l
lb/ft³
oz/ft³
lb/inch³
Face velocity
m/s
ft/s
Pressure drop
Pa
kPa
Volumetric flow
m³/h
m³/min
m³/s
l/h
l/min
l/s
ft³/h
ft³/min
ft³/s
Mass flow
kg/h
kg/min
kg/s
lb/h
lb/min
lb/s
Specific heat
J/kg K
kJ/kg K
Specific volume
m³/kg
l/kg
Conductivity
W/m K
mW/m K
Inlet temperature
°C
F
K
Outlet temperature
°C
F
K
Volumetric flow
m³/h
l/h
l/s
ft³/m
ft³/s
Mass flow
kg/h
kg/s
lb/h
lb/s
Pressure drop
Pa
kPa
Velocity
m/s
ft/s
Density
kg/m³
kg/l
lb/ft³
lb/inch³
oz/ft³
Viscosity
Pa s
mPa s
µPa s
Specific Heat
J/kg K
kJ/kg K
Conductivity
W/m K
mW/m K
Condensing temperature
°C
F
K
Evaporating temperature
°C
F
K
Subcooling
°C
F
K
Superheating
°C
F
K
Glide
°C
F
K
Middle temperature
°C
F
K
Sature pressure
Pa
kPa
Pressure drop
Pa
kPa
Mass flow
kg/h
kg/s
lb/h
lb/s
Density
kg/m³
kg/m³
lb/m³
lb/m³
kg/l
g/l
lb/l
oz/l
kg/inch³
g/inch³
lb/inch³
oz/inch³
kg/ft³
g/ft³
lb/ft³
oz/ft³
Enthalpy
kJ/kg
J/kg
kCal/kg
Entropy
kJ/kg
J/kg
kCal/kg
Viscosity
Pa.s
mPa.s
uPa.s
Conductivity
W/m.K
mW/m.K
Specific heat
J/kg.K
kJ/kg.K
Surface tension
N/m
Gas velocity
m/s
ft/s
Contained
kg
g
lb
oz
Vapour in inlet
%
X
Capacity
kW
kcal/h
BTU/h
Condensate
m³/h
l/h
Dimension
mm
m
Diameter
mm
ft
inch
Weight
kg
Surface area
m²
mm²
ft²
inch²
Circuit volume
m³
mm³
l
ft³
inch³
Max operating Press. PS
bar
Pa
kPa
Surface reserve
%
X
Use only
Fin spacings
Limits
Fluid
Fluid
Evaporator
Condensator
Max acceptable fluid heat pressure drop [%]
Max acceptable fluid cool pressure drop [%]
Max acceptable under capacity [%]
Max acceptable over capacity [%]
Max acceptable refrigerant condensator pressure drop [%]
Max acceptable refrigerant evaporator pressure drop [%]
