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Nomenclature/Legend

(Symbols used in selections)

h specific enthalpy
hfg latent heat of vapourisation of water = 2450kJ/kg
J, kJ Joule, kilojoule
K degree Kelvin
L,L/s litre, litre per second
°C degree Celsius
Pa, kPa Pascal, kilopascal
q room load or unit capacity, W
ql room latent load or unit latent capacity, W
qs room sensible load or unit sensible capacity,W
qtot room total load or unit total capacity, W
QPA primary air quantity, L/s
QSA supply air quantity, L/s
QSCA secondary air quantity, L/s
QSCHW secondary chilled water quantity, L/s
rh relative humidity, %
RA room air
PA primary air
SCA secondary coil air
SA supply air
SCHW secondary chilled water(F=flow; R=return)
tPA primary air temperature,°C
tRA average room temperature, °C
tSA average supply air temperature, °C
tSCHW secondary chilled water temperature, °C
w moisture content/ specific humidity, g/kg
W, kW Watt, kilowatt