M.E. Nebraska
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Turbine Question on NCEES Sample Questions & Solutions Manual (#519)
Question asks for the mass flow rate to the inlet of Turbine.
Turbine Inlet (1)
p1=900 psia
T1= 900 F
h1 = 1452 Btu/lb
Turbine Outlet #1
p2=60 psia
h1=1201 Btu/lb
m2=m1*10%
Tubine Outlet #2
p3=1 psia
h3=970 Btu/lbm
W = Output of Turbine - 10,000 kW or 34,130,000 Btu/hr
NCEES Solution
W=m1* ((1*(h1-h2)+0.9*(h2-h3))
If you use W = m1* (0.1*(h1-h2) + 0.9*(h1-h3)) you get the same answer. Is this by coincidence or is my equation valid?
Question asks for the mass flow rate to the inlet of Turbine.
Turbine Inlet (1)
p1=900 psia
T1= 900 F
h1 = 1452 Btu/lb
Turbine Outlet #1
p2=60 psia
h1=1201 Btu/lb
m2=m1*10%
Tubine Outlet #2
p3=1 psia
h3=970 Btu/lbm
W = Output of Turbine - 10,000 kW or 34,130,000 Btu/hr
NCEES Solution
W=m1* ((1*(h1-h2)+0.9*(h2-h3))
If you use W = m1* (0.1*(h1-h2) + 0.9*(h1-h3)) you get the same answer. Is this by coincidence or is my equation valid?
