It is assumed in the turbine:
It is insulated so that no heat enters or leaves the system i.e. flow of fluid through the turbine is adiabatic.
therefore, q = 0 ……….. (1)
Changes in potential energy and kinetic energy are negligible i.e.
..........(2)
applying steady flow energy equation per unit mass
using equation (1) and (2)
h1 = h2 + w
w = (h1 — h2)
This shows that work is done by the system due to decrease in enthalpy of system.
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