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Table 1. Work produced when air is raised reversibly from sea level to the 20 kPa level, based on 20 kPa level of 12400 m.
Air Properties
P1 (kPa) 101.0 101.0 101.0 101.0
T1 (C) 27.0 28.0 27.0 28.0
T1 (K) 300.15 301.15 300.15 301.15
U1 (%) 80 75.31 85 80
r1 (g kg-1) 18.18 18.18 19.31 19.31
h1 (J kg-1) 73485 74535 76382 77422
s1=s2 (J K-1kg-1) 256.7 260.2 266.5 269.9

P2 (kPa) 20.0 20.0 20.0 20.0
z2 (m) 12400 12400 12400 12400
T2 (K) 228.50 229.21 230.85 231.54
h2 (J kg-1) -51954 -51154 -49778 -48979
h2+gz2 (J kg-1) 71775 72575 74088 74887

Work (J kg-1)
Dh12 =h1-h2 125440 125690 126160 126401
D gz12=gz(1+r) 123730 123730 123867 123867
wb 1710 1960 2295 2535
Dwb base 250 585 825

Base Pressure Reduction (kPa)
DP 1.94 2.21 2.59 2.84



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