9-31 - 9-31EquationsSet 25 Problem 9.31At the beginning of...

Info iconThis preview shows pages 1–3. 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
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 9-31EquationsSet 25: Problem 9.31At the beginning of the compression process in an air-standard Diesel cycle, P1=1 bar and T1=300 K. For maximum cycletemperatures fo 1200, 1500, 18000, and 2100 K, plot the heat adition per unit mass, the net work per unit mass, the meaneffective pressure and the thermal efficiency, each versus compression ratio ranging from 5 to 20T1= 300(1)P1= 100 [kPa](2)s1= s (Air,T=T1,P=P1)(3)u1= u (Air,T=T1)(4)v1= v (Air,T=T1,P=P1)(5)s2=s1(6)v2=v1r(7)T2= T (Air,s=s1,v=v2)(8)u2= u (Air,T=T2)(9)P2= P (Air,s=s1,v=v2)(10)h2= h (Air,T=T2)(11)P3=P2(12)T3=Tmax(13)s3= s (Air,P=P3,T=T3)(14)CutOffRatio=v3v2(15)v3= v (Air,T=T3,P=P3)(16)u3= u (Air,T=T3)(17)h3= h (Air,T=T3)(18)s3=s4(19)T4= T (Air,s=s4,v=v4)(20)v4=v1(21)u4= u (Air,T=T4)(22)wcycle=w12+w23+w34(23)w12=u1-u2(24)q23=h3-h2(25)q23-w23=u3-u2(26)w34=u3-u4(27)η=wcycle/q23(28)mep=wcyclev1-v2(29)1500 KRunTmaxrwcycleηCutOffRatiomepq23[K][kJ/kg][kPa][kJ/kg]115005321.60.3022.655466.91065215005.625350.40.33762.54495103831500...
View Full Document

This note was uploaded on 07/29/2008 for the course ME 361 taught by Professor Martin during the Spring '07 term at University of Wisconsin.

Page1 / 3

9-31 - 9-31EquationsSet 25 Problem 9.31At the beginning of...

This preview shows document pages 1 - 3. Sign up to view the full document.

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