Roxul Industrial Insulation Process - Manual (Page 135)

3.1 Units, conversion factors and tables
3.1.1b Symbols, definitions and units (European Convention)
Symbol Definition Unit
A Area m 2
b Length m
C
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Radiation coefficient W/(m 2 ⋅ K 4 )
c Specific heat capacity J/(kg ⋅ K)
c
p
Specific heat capacity at constant pressure J/(kg ⋅ K)
d Diameter m
f Correction factor -
H Height m
h Enthalpy J/kg
k Heat transfer coefficient W/(m 2 ⋅ K), W/K, W/(m ⋅ K)
k' Total heat transfer coefficient W/(m 2 ⋅ K), W/K, W/(m ⋅ K)
l Length m
m Mass kg
m
.
Massflow kg/s, kg/h
n Operation time a
P Pressure Pa
Q Heat energy J
Q
.
Heat flow W
q Heat flow density W/m 2 or W/m
R Thermal resistance m 2 ⋅ K/W, m ⋅ K/W, K/W
R Specific heat capacity J/(kg ⋅ K)
s Insulation thickness m
t Time h or s
T Temperature (Kelvin) K
U Circumference m
w Wind speed m/s
α Total heat transfer coefficient (incl. cold bridges) W/(m 2 ⋅ K)
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