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# Binder9 - Assignment 9 Gas Power Cycles D60 An air-standard...

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Unformatted text preview: Assignment 9 Gas Power Cycles D60 An air-standard Otto cycle has a compression ratio of 8.5. At the beginning of compression, p1 = 100 kPa and T1 = 300 K. The heat addition per unit mass of air is 1400 kJ/kg. Determine (a) the net work, in kJ per kg of air, (b) the thermal efﬁciency of the cycle, (c) the mean effective pressure, in kPa, (d) the maximum temperature in the cycle, in K, and (e) To investigate the effects of varying compression ratio plot each of the quantities calculated in parts (a) through (d) for compression ratios ranging from 1 to 12. D61 Solve Problem D8.1 on a cold air-standard basis with speciﬁc heats evaluated at 300 K. D62 The conditions at the beginning of compression in an air-standard Diesel cycle are ﬁxed by p; = 200 kPa, T1 = 380 K. The compression ratio is 20 and the heat addition per unit mass is 900 kJ/kg. Determine (a) the maximum temperature, in K, (b) the cutoff ratio, (0) the net work per unit mass of air, in kJ/kg, (d) the thermal efﬁciency, (e) the 4 mean effective pressure, in kPa, and (f) To investigate the effects of varying compression ratio, plot each of the quantities calculated in parts (a) through (e) for compression ratios ranging from 5 to 25 . D63 The rate of heat addition to an air—standard Brayton cycle is 5.2E8 Btu/h. The pressure ratio for the cycle is 12 and the minimum and maximum temperatures are 520°R and 2800°R, respectively. Determine (a) the thermal efﬁciency of the cycle, (b) the mass ﬂow rate of air, in lb/h, and (c) the net power developed by the cycle, in Btu/h. D64 Solve Problem 8.4 on a cold air-standard basis with speciﬁc heats evaluated at 520°R. D65 Air enters the compressor of a regenerative gas turbine with a volumetric ﬂow rate of 1.4E5 ft3/min at 14 lbf/inz, 540°R, and is compressed to 70 lbf/inz. The air then passes through the regenerator and exits at 1060°R. The temperature at the turbine inlet is 1540°R. The compressor and turbine each have an isentropic efﬁciency of 80%. Using an air-standard analysis, calculate (a) the thermal efﬁciency of the cycle, (b) the regenerator effectiveness, and (c) the net power output, in Btu/h. g College of Engineering . go 62le A,w§%gn14ra( We [yd/c f‘: 9.; Q); : /‘/é0 Assam Var/321% Spay}; Hark ,,L__, __,_..ZL.__, 3 ,_.i’_~ I”: #3143 7‘: Back FJNO I'd/(A) Mo‘ (“7ij (B) ’?+A ' 1c) ma» cm) (a!) 7:? (k) 5‘74 /r/A/t4w 399’ ’14) Mr M “3100‘; : 0L, ~11, /5f/‘"‘/ / fa L : I, ._ .‘ C? : 6/3, 0/1 £5 L p ﬂ (43: 4 7w? : = Ugo/751' :wu)’; —— .7: M s I In" TM-Z: 1/1"”: N3 N}: w MHZ? 15 744%: ,./1);,=I“Nm = 2/20? g I [:71 45/ anj : /. 7/7 41:.- _. 42;»,- W s /4.3/ N. N; 'M W I : 0673.0 153; M1 , x u 0 —* d ‘3' d —- .//7 A”, I“ { /.3M=W= mmf I!“ Mw=1j5 4.2/1 muggy: 710.79%; Mn,— N}, :Q/ﬂws 44 : z :3 \$43. I E “a ,M; = «29’: 297.03 ‘l—é College of Engineering UNIVERSITY 07’ ARKANSAS 1'?) _ , a, (0.90 -6./0)2)m3 ' 76/7 [3 223/. ’/ ,Q UNIVERSITY Q‘ARKANSAS @IVF «V Ar; 9311/in (7/53 Gré : P- I 4],“ _-.- MM *" Akin“ (Mﬁ 2:4?05 ,f—i- ﬂslﬂazér" r: 7a; A: £1 ¢~ _ £3 “23"” ' A z?) 34;? 09) ‘73 54’ Z Friar A ‘ M1“: 3442‘ -— M £1: J...— UNIVERSITY # ARKANSAS College of Engineering Cal} Er; 'D # Air ~ SfdnJm'J Dfﬁ \$9 (C P : 10 4;“ = 7m k37kg ‘ ' College of Engineering ——£—— UNIVERSITY 9! ARKANSAS W MNL n = +M—M 7—3 35/12. /5* Am, Z» 7 223 — :‘ “3—41 0/2 .7 5% M3 5 (23 G M:- L? 2 “(1311/1 : M 7.3 /!‘fézw 3-»;‘7 3w=éA/-% 6 M3 :11 M/th M 5 M 7%. Wm W; 5 55m /3 .1ng = ' UNIVERSITY 9! ARKANSAS GI UE (Y grQ/Vﬁn O'c/e I B (4 41.11 5 3T lX/og f” P : /2_ = ’33:}. F M1!“ ASSWm’ Marja“! sawiﬁ': Am‘ I Z ____-__.—-—» 7‘: 5:24,? T: .2wa aim/é? ’ ' (30112::6 or a; ARKANSAS UNIVERSITY {g'f/rw (of mtg/Q: MHZ-413 C13 #— UNIVERSITY 4ARKANSAS College of Engineering 5m) 712m (yr/e 64/ ##1— Srerw—J éasﬁr lax/Spaﬁ'k A47} iW/MAJ 6 520/6 V':}7_ “ ﬂhqx P """"‘_" College of Engineering Elma mm M W ﬂRKANSAS ' College of Engineering UNIVERSITY Q'ARKANSAS ‘ g College of Engineering UNIVERSITY 9‘ ARKANSAS ...
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Binder9 - Assignment 9 Gas Power Cycles D60 An air-standard...

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