Q2/Gas turbine unit having heat exchanger with thermal ratio(0.75),a high pressure stage turbine drives the compressor and a low pressure stage turbine generate the power. The overall pressure ratio is (5/1) and the maximum temperature is (1000 o c).The isentropic efficiencies of compressor, H.P.T and L.P.T are (0.7),(0.78) and (0.8) respectively and mechanical efficiency of both shafts is (99 %) . Calculate:

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Q2/Gas turbine unit having heat exchanger with thermal ratio(0.75),a
high pressure stage turbine drives the compressor and a low pressure
stage turbine generate the power. The overall pressure ratio is (5/1) and
the maximum temperature is (1000 o

c).The isentropic efficiencies of
compressor, H.P.T and L.P.T are (0.7),(0.78) and (0.8) respectively and
mechanical efficiency of both shafts is (99 %) . Calculate:
a- The pressure between turbine stages when the air intake condition
are (1 bar) and (29 o
c)

b- Thermal efficiency when the mass flow is (30 kg/sec)
Cpg= 1.15 kJ/kg.K ɣg=1.33

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