Page 199 - Entrophy Analysis in Thermal Engineering Systems

Index 197

R T
Rankine, 23–24 Teaching entropy, 29, 35–36, 36f
Regenerative gas turbine cycle Carnot corollaries, 30–33
heat exchanger, 117–118 Carnot efficiency, 33–38
hot combustion gases, 116 Clausius inequality, 35, 36f
maximum thermal efficiency, 117 Temperature scale, 34–35
Temperature-specific entropy (T-s)
minimum SEG, 117–119, 118t
specific entropy generation (SEG), diagram
116–117 Carnot vapor cycle, 77–78, 77f
Regenerative hybrid cycle, 146–147 Curzon-Ahlborn engine, 68–69, 68f
Reversibility, 7 irreversible engines, 85, 86f
Reversible adiabatic compression, 42 modified Novikov’s engine, 74–75, 74f
Reversible adiabatic expansion, 42 Novikov’s engine, 72, 73f
Reversible Carnot cycle, 67 Theorem of the equivalence of
Reversible process, 29, 41–42, 156–157 transformations, 25, 38, 41–42
Rumford’s experiment, 15–16 Thermal effect, 45, 53
Thermal efficiency, 87, 89, 89f,91–92, 94,
S 100, 102, 109–110
Second law of thermodynamics, 5–7 Thermal exergy, 169–171
SEG. See Specific entropy generation Thermodynamics
(SEG) combined first and second laws, 10–11
Solid oxide fuel cell (SOFC), 131–132, 142 first law, 3–4
DC electric power production, 143 history, 13
entropy generation, 144 before 1800, 14–16
molar flowrate of water, 143 1800 to 1849, 16–23
oxygen flowrate, 143 theoretical developments, 23–26
properties, 1–2
schematic of, 142, 142f
total molar flowrate, 144 second law, 5–7
total product’s enthalpy, 143 third law, 7
total reactants’ enthalpy, 142 Thermodynamic temperature scale, 29
Specific entropy generation Third law of thermodynamics, 7
(SEG), 103, 141 entropy generation, 7
in closed systems, 8–10
of gas turbine cycle, 189–190, 190t
in open systems, 10
hybrid cycle, 145, 145–146f
irreversible engines, 103–105 Thomson theoretical analysis, 23–24
Specific exergy destruction Turbine inlet temperature (TIT), 112, 122,
(SED), 173–174 123f
Steam cycle, 122, 123t
Steam engine, 14, 17, 55 U
Uncompensated transformation, 7, 41–42,
Steam turbine, 119, 121t
67
Stirling cycle, 38, 56, 56t
compression ratio, 57
W
efficiency comparison, 64, 64t
pressure ratio, 57 Water-gas shift reaction, 135
p-V diagram, 57, 57f
thermal efficiency, 57 Z
Stochiometric coefficient, 105–106, 158 Zero entropy generation, 181