Question

ME 372: Homework# 4 a) Argon, considered as an ideal gas, is compressed through an isentropic process (1-2s) in a single stage compressor as shown in figure below isentropic From inlet (1) where the pressure and temperature are (200 kpa) and (27o c) respectively to exit (2s) where the pressure is (2000 kpa ) . If (k= 1.667 ) and ( R = 0.2081 kJ/kg. k ) a.1) determine the specific work (Wis) done by the compressor on Argon along this process. a.2) Now if the process of compression is actual (not isentropic) and equal to (Wac 272 kJ/kg), determine the isentropic efficiency ( for the compressor a.3) Now the isentropic compression of argon is performed in two stages (1-2m) as shown in the previous figure but the work in the second stage is 2 times the work in the first stage. If the total work (for the two stages) is ( wtot-210 kJ/kg), determine the pressure (px)

Answer 1

nSwer Given Triet Gnditions rn 2 S 3ooK. Inte coolin K2 1.GCヌ Condition at &s Euotion for Compression s as Folous ol SPecific wok done by ComPye SSoy (K mass of Argon Campressed,

Note:- By substituting all the yolues we jet RTİ \.GG구 o.9081メ3x Here maSS uvill remain = Same ASSumPtion: Tt is compresSible 8as &ooKfa 1-a5 the Com PreSsor Tsenropic efficiency of actjal 36 0.86チ:6 i3entYoPic

ow, isentropic ComPressi on of aon is Performe then w Uul Total k3 =위。 KRT KRT