Page 198 - Entrophy Analysis in Thermal Engineering Systems

196 Index

Mixing, 50–52
Irreversible engines (Continued)
gas turbine power cycle (see Gas turbine of gases, 51–52, 52f
cycle) of liquids, 50, 50f
maximum thermal efficiency, 103 Modified Novikov’s engine, 75
organic Rankine cycle (ORC), entropy generation, 75
126–128 maximum power production, 75
regenerative gas turbine cycle, 116–119 thermal efficiency, 75–76, 76f
reversible work, 105–110 T-s diagram, 74–75, 74f
specific entropy generation (SEG),
103–105 N
Nernst theorem, 7
steam power cycle, 103, 104f
total entropy generation, 103 Normalized entropy generation, 75–76, 82,
Irreversible process, 41–42, 45–46, 52, 82f, 90, 96f,98–100, 99f
113–115, 121 Novikov’s engine
Isentropic compression and expansion, entropy generation, 74
99–101 maximum power condition, 73
Isentropic efficiency, 111–112 modified model, 74–77
Isentropic process, 53–54 temperature-specific entropy (T-s)
Isolated system, 9 diagram, 72, 73f
J O
Joule’s experiment, 21–22, 48–49 Open circuit voltage, 137–138, 138t
Optimum pressure ratio, 87–91
K Organic Rankine cycle (ORC), 125–128
Kalina power cycle, 56 Otto cycle, 56t
Kelvin-Planck statement, 5 efficiency comparison, 64, 64t
irreversible, 85–86, 86t,91–95
L p-V diagram, 59, 59f
thermal efficiency, 59
Lower heating value (LHV), 109, 110t
Low-temperature thermal reservoir, 30–32,
69, 74 P
Poisson’s equations, 20–21
M Power cycles, 56, 56t
Mariotte’ law, 14 efficiency comparison, 64–65, 65–66f
Mass conservation, 2, 180–181 Power production, 70, 75
Maximum conversion efficiency, 132–137 Pressure drop, 45–48, 52–53
Maximum power, 87–88, 92–95, 98, 136, Pressure ratio (PR), 56–57
139 of Brayton cycle, 58
Maximum power efficiency, 189 of Diesel cycle, 62
Maximum thermal efficiency, 68, 71, 80–82, of Stirling cycle, 57
85, 90, 92–96, 177–179 Properties of matter, 1
Mechanical Theory of Heat,13–14 Property, definition of, 1
p-V diagram
Methane fuel cell, 135–136, 137f
Miller cycle, 56, 56t,62–64 of Atkinson cycle, 60, 60f
efficiency comparison, 64, 64t of Brayton cycle, 58, 58f
p-V diagram, 62–63, 62f of Diesel cycle, 61–62, 61f
thermal efficiency, 62–63 of Miller cycle, 62–63, 62f
Minimum entropy generation, 68, 74, 82, of Otto cycle, 59, 59f
85, 90–91, 93, 96–97 of Stirling cycle, 57, 57f