Page 190 - Entrophy Analysis in Thermal Engineering Systems

186 Nomenclature

U internal energy
U a air utilization factor, Chapter 9
U f fuel utilization factor, Chapter 9
V volume
V voltage, Eq. (9.23)
w specific work
W work
_ W power
X conversion
y i
mole fraction of component i

Greek letters

α expansion coefficient, Eq. (2.10)
α parameter defined in Eq. (7.12)
β parameter defined in Eq. (7.13)
β fractional conversion factor, Eq. (10.29)
Δ quantitative variation/difference
γ ¼c p /c v
e heat exchanger effectiveness, Eq. (8.49)
ε negligible real number
η efficiency
second law efficiency
η SL
κ reaction constant, Eq. (10.22)
Λ stochiometric coefficient
μ Carnot’s function, Eqs. (2.11) and (2.13)
ξ reaction advancement
π ¼T H /T L , Eq. (7.15)
ρ density
ϕ fuel-air equivalence ratio
Φ entropy generation
Φ _ entropy generation rate
ψ specific exergy
Ψ exergy

Subscripts

0 Reference state, 298.15 K & 1 bar
ad adiabatic
c compressor