Scribd
Upload
167 views4 pages

Part-C (5 X 14 70 Marks)

The document describes two thermodynamic cycles: 1) An air standard dual cycle with a compression ratio of 16 and maximum pressure of 70 bar is shown to have a cycle efficiency of X% and a mean effective pressure of Y bar. 2) An open cycle gas turbine operates at 1-4 bar with compressor and turbine efficiencies of 78% and 85% respectively. Given an air flow rate of 2.5 kg/s, the power developed is Z kW and the thermal efficiency is W%.

Uploaded by

BALAMBAL R
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
167 views4 pages

Part-C (5 X 14 70 Marks)

The document describes two thermodynamic cycles: 1) An air standard dual cycle with a compression ratio of 16 and maximum pressure of 70 bar is shown to have a cycle efficiency of X% and a mean effective pressure of Y bar. 2) An open cycle gas turbine operates at 1-4 bar with compressor and turbine efficiencies of 78% and 85% respectively. Given an air flow rate of 2.5 kg/s, the power developed is Z kW and the thermal efficiency is W%.

Uploaded by

BALAMBAL R
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 4

PART-C (5 x 14 = 70 marks)

21. (a). An air standard Dual cycle has a compression ratio of 16, and compression begins
at 1 bar, 50°C. The maximum pressure is 70 bar. The heat transferred to air at constant
pressure is equal to that at constant volume. Determine: (i) The cycle efficiency. (ii) The
mean effective pressure of the cycle. (14)
(OR)
21. (b). In an open cycle constant pressure gas turbine air enters the compressor at 1 bar
and 300 K. The pressure of air after the compression is 4 bar. The isentropic efficiencies
of compressor and turbine are 78% and 85% respectively. The air-fuel ratio is 80: 1.
Calculate the power developed and thermal efficiency of the cycle if the flow rate of air is
2.5 kg/s. Take cp = 1.005 kJ/kg K and γ = 1.4 for air and cpg = 1.147 kJ/kg K and γ = 1.33
for gases. R = 0.287 kJ/kg K. Calorific value of fuel = 42000 kJ/kg. (14)

You might also like