Table 1. MPI and Base Pressure Reduction for air
raised from sea level to the 20 kPa level. T1= SST - 1.

Air
Property
Reversible
Case A
Irreversible
Case B
Air-Sea Int.
Case C

SST (C)28.028.028.0
P1 (kPa)101.0101.0101.0
T1 (C)27.027.027.0
T1 (K)300.15300.15300.15
U1 (%)808080
r1 (g kg-1)18.1818.1818.18
m1=h1 (J kg-1)734857348573485
s1 (J K-1kg-1)256.7256.7256.7

P2 (kPa) (MPI)99.0698.4896.29
T2 (K)298.50300.15300.15
r2 (g kg-1)18.1818.1821.49
U2 (%)86.777.990
m2=h2 (J kg-1)717757348581931
s2 (J K-1kg-1)256.7264.4299.3

P3 (kPa)20.020.020.0
T3 (K)228.50230.02237.94
r3 (g kg-1)18.1818.1821.49
z3 (m)124001240012400
h3 (J kg-1)-51954-50243-42201
m3=h3+gz3(1+r)717757348581931
s3 (J K-1kg-1)256.7264.2299.3

Work (J kg-1)
Dh23 =h2-h3123730123730 124130
D gz23=gz(1+r)123730123730124130
w23000
wx171022324230

Velocity (m s-1)
vx58.566.892.0

Surface Pressure Reduction (kPa)
DP12 (HI)1.942.524.71