ch11_eng - SOLUTION MANUAL ENGLISH UNIT PROBLEMS CHAPTER 11...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: SOLUTION MANUAL ENGLISH UNIT PROBLEMS CHAPTER 11 FUNDAMENTALS of Thermodynamics Sixth Edition SONNTAG • BORGNAKKE • VAN WYLEN Sonntag, Borgnakke and van Wylen CHAPTER 11 SUBSECTION PROB NO. Rankine Cycles 167-181 Brayton Cycles 182-187 Otto, Diesel, Stirling and Carnot Cycles 188-201 Refrigeration Cycles 202-207 Availability and Combined Cycles 208-212 Review Problems 213-217 Correspondence List The correspondence between the new English unit problem set and the previous 5th edition chapter 11 problem set and the current SI problems. New 5th SI New 5th SI New 5th SI 167 117 mod 21 184 new 73 201 148b 118 168 118 mod 22 185 133 74 202 new - 169 new 24 186 136 86 203 149 120 170 119 26 187 137 89 204 150 121 171 120 27 188 138 93 205 151 125 172 new 32 189 139 95 206 new 130 173 121 mod 33 190 new 97 207 new 137 174 122 mod 35 191 new 98 208 new 146 175 123 mod 37 192 141 104 209 155 147 176 125 mod 45 193 140 105 210 new 148 177 124 48 194 142 107 211 new 150 178 127 mod 55 195 143 109 212 154 144 179 128 mod 57 196 144 112 213 126 - 180 129 60 197 145 113 214 130 157 181 131 mod 66 198 146 114 215 134 160 182 132 71 199 147 116 216 135 160 183 new 72 200 148a 117 217 153 134 Sonntag, Borgnakke and van Wylen Rankine cycles Sonntag, Borgnakke and van Wylen 11.167 E A steam power plant, as shown in Fig. 11.3, operating in a Rankine cycle has saturated vapor at 600 lbf/in. 2 leaving the boiler. The turbine exhausts to the condenser operating at 2.225 lbf/in. 2 . Find the specific work and heat transfer in each of the ideal components and the cycle efficiency. Solution: For the cycle as given: 1: h 1 = 97.97 Btu/lbm, v 1 = 0.01625 ft 3 /lbm, 3: h 3 = h g = 1204.06 Btu/lbm, s 3 = s g = 1.4464 Btu/lbm R C.V. Pump Reversible and adiabatic. Energy: w p = h 2- h 1 ; Entropy: s 2 = s 1 since incompressible it is easier to find work (positive in) as w P = ∫ v dP = v 1 (P 2- P 1 ) = 0.01625(600 – 2.2) 144 778 = 1.8 Btu/lbm h 2 = h 1 + w P = 97.97 + 1.8 = 99.77 Btu/lbm C.V. Boiler: q H = h 3-h 2 = 1204.06-99.77 = 1104.3 Btu/lbm C.V. Tubine: w T = h 3- h 4 , s 4 = s 3 s 4 = s 3 = 1.4464 = 0.1817 + x 4 × 1.7292 => x 4 = 0.7314, h 4 = 97.97 + 0.7314 × 1019.78 = 843.84 Btu/lbm w T = 1204.06 - 843.84 = 360.22 Btu/lbm η CYCLE = (w T- w P )/q H = (360.22 - 1.8)/1104.3 = 0.325 C.V. Condenser: q L = h 4- h 1 = 843.84 - 97.97 = 745.9 Btu/lbm Q W T 3 2 4 1 Condenser Boiler Turbine W P Q B T s 1 2 3 4 Sonntag, Borgnakke and van Wylen 11.168 E Consider a solar-energy-powered ideal Rankine cycle that uses water as the working fluid. Saturated vapor leaves the solar collector at 350 F, and the condenser pressure is 0.95 lbf/in. 2 . Determine the thermal efficiency of this cycle....
View Full Document

Page1 / 60

ch11_eng - SOLUTION MANUAL ENGLISH UNIT PROBLEMS CHAPTER 11...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online