Gas Turbine Handbook : Principles and Practices

Gas Turbine Systems Theory 47
Figure 4-1c.
In most gas turbine applications, the numerical magnitude of
the difference in potential energy is so small, relative to the other
values in the equation, that it is customary to disregard it. This first
law equation is rewritten as follows:
W (1Q2) ≡ W h2 – h1 + KE2 – KE1 + PE2 – PE1 + 1 W2
J (4-2)
For adiabatic processes (no heat transfer)
1Q2 = 0 (4-3)
W Äh + ÄKE + 1 W2
J
=0
(4-4)
W 1 W2
J = W h1 – h2 +KE1 – KE2
HP =
W
0.707
h1 – h2 +KE1 – KE2
= Power
and
(4-5)
(4-6)