An air-standard Diesel cycle has a compression ratio of 16 and a cutoff ratio of 2….
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Question “An air-standard Diesel cycle has a compression ratio of 16 and a cutoff ratio of 2….”
An air-standard Diesel cycle has a compression ratio of 16 and a cutoff ratio of 2. At the beginning of the com pression process, air is at 95 kPa and 27℃ Accounting for the variation of specific heats with temperature, determine (a) the temperature after the heat-addition process, (b) the thermal efficiency, and (c) the mean effective pressure
Answer
Ans Given fhat An A,Straasd Diesel Cycle, ras an a Cernanessim Yako at tna beginning, an a 95kra-awd 272 4 Exbiess tempesali, ad Speckfic Volae Elation 0 V2. Heye TTempe at Stota T2 Tempera, v. -specific Volume ofStato. 1/2 . SPecific Volume atstato 2 kPecific heat alio
V2/ 30ok x 16 989.4k T989.yk es tetenperali, pestuse aud Speci-fic Volume relatino far tre censhnt pressure hect adatio process 2 Hereno T3 . Tempenture at Stat. 3 v2ya specific Volume ctth 2 Vg. Specific Volame in state 3 P3 : Pressure at Stalo 2
For pocess 2-3: So V3 2 909.4 1818.8k hexce, the temperature at the end of f me haatition process is%-siBK b). The Theimal efficiency addition Process 2-3 for Constant Pessure heat a expyess eat odelition odetion (in) as Ya Op Specific heat at Constantpessire Substibit 12 909.k
‘-i.to5KJKg.KK909 .4Tai 913.3g aud specific volume velation as Vy t, Tempenliue at Stns N Specific volune at Stah 4 Scuostitut 8188 k V2 /6
For Constant Volve Heat vejeclion Xess HeYe Specific heat at Constant volume ul = Trtenal Ener7y at State l U4 Substitate 11 =300K out353 Expes: s the ‘therma ethicienaOHs arcletuwas
Subs lituto 1 In 13.93i 353niDing/kg th: 1-3862 2. 6138 : 1 in 13.93i 353niDing /kg th : 1-3862 2 0.
trpess at stateso a.s.RT Pt Here Pre-sare, State 1al? Jas Costart Uostituta As kpa0306 3 The given clasel Cycle Emess the ranean Twafective Tres Sus suxefa tha Giver) diesel aycls as Wnet iout.NT wnet
Heye, Substitute net Ocut 560 93×9 Ding the mean datctive pressure fo aiven Diesel Cycle 66o 4 Kpa, ver)
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