Lec36 - 173.88, 0.5926 v=0.0010084 need to calculate pump...

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ME 200: Thermodynamics I Lecture 36: Improving Rankine Cycle Performance with Superheat and reheat Section 8.3 Problems: SP36; 8.27, 8.28 Professor Hukam Mongia Office Hours: MWF 2:30 to 3:30 pm in ME 83 (Other times email for appointment) Email: hmongia@purdue.edu Phone: 765-494-5640 Course Website: https://engineering.purdue.edu/ME200 Course Secretaries: Diana Akers (ME 84) and Marilyn Morrison (ME 100) See Kul Inn (ME 189) about grading Homework Assignments 1
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T Superheated Rankine Cycle Gain in h thermal Superheat + Reheat Supercritical + Reheat 374 o C 221 bars Highest h thermal 2
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Ideal Reheat Cycle- Extension of Problem 8.1 (which uses saturated vapor T=295 o C h thermal = 37.1%) 3
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480 440 295 165 41.51 o C kJ/kg.K Need s to calculate x 2 4 ; and h 1 , h 2 , h 3 , h 4 , h 5 5 3348.4, 6.6586 3353.3, 7.7571 697.22, 1.9922 2763.5, 6.708
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Unformatted text preview: 173.88, 0.5926 v=0.0010084 need to calculate pump work 2577, 8.2287 0.9895 2741.8 0.9382 2428.5 h 6 =181.94 (from Prob. 8.1) 606.6 924.8 3166.5 611.5 h thermal ? 40.3% Compared to 37% 2.36 vs. 3.77x105 kg/h 37% reduction 148 vs.170 MW 13% reduction 4 85 % isentropic turbine efficiency 2832.8 2567.2 h thermal = 35.1% vs. 40.3 w/ ideal cycle. 5 6 T, o F s, Btu/lb-o R 1 2s 2 3 4 5 6 1 psi 1000 1317.4 1.4078 486.33 486.33 471.7 0.6723 1204.1 1.4464 1517.8 1.7155 x 2s ? 4s 69.74 0.1327 v=0.01614 ft3/lb Need it for pump work =v(p 6-p 5 )=86.61 Btu/lb 1105.8 1.9779 h in Btu/lb x 4s ? Turbine and pump h are 85% x 2s =0.95, h 2s =1167.49; h 2 =1189.98 x 4s =0.8577, h 4s =958.32; h 4 =1042.24 h thermal = 37.6% 7 8 9...
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Lec36 - 173.88, 0.5926 v=0.0010084 need to calculate pump...

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