Page 14 - Advanced thermodynamics for engineers
P. 14
NOTATION xxiii
Specific heat (energy) transfer
q
Electrical charge
q l
Heat (energy) transfer
Q
Heat of transport
Q*
Enthalpy of reaction (energy of reaction at constant pressure)
Q p
0
Calorific value (at constant pressure) ¼ Q p
Q p
Internal energy of reaction (energy of reaction at constant volume)
Q v
0
Calorific value (at constant volume) ¼ Q v
Q v
Compression ratio (of reciprocating engine)
r
Pressure ratio
r p
Work ratio
r w
Back work ratio
r wb
Specific gas constant
R
R Rate of formation, rate of reaction
Radical
R
Electrical resistance
R
Reaction rate (Whitehouse and Way eqn.)
R
< Universal gas constant
Reynolds number ½rv[=m
Re
Specific entropy
s
Specific entropy at datum temperature (or absolute zero)
s 0
Entropy
S
Entropy of transport
S*
SOFC Solid oxide fuel cell
SPFC Solid polymer fuel cell
Temperature on discontinuous scale
t
Time
t
Temperature on absolute scale (thermodynamic temperature)
T
Specific intrinsic internal energy
u
Specific intrinsic internal energy at datum temperature (or absolute zero)
u 0
0 Turbulence intensity
u
ul Laminar burning velocity
Turbulent burning velocity
u t
Intrinsic internal energy
U
Overall heat transfer coefficient
U
Specific volume
v
Volume
V
Velocity
V
Voltage
V
Mean piston speed (for reciprocating engines)
V p
Specific work
w
Maximum specific work
b w
Work
W
Dryness fraction (quality)
x
Molar fraction
x
