1. a combined cycle system has the following conditions: combustion turbine information ct pressure ratio = 9 turbine inlet temperature = 2100 f compressor efficiency = 85% turbine efficiency = 90% burner efficiency = 95% steam cycle information main steam conditions: p=600 psia, t=750 f condenser pressure = 1.5 psia hrsg pinch = 60 f turbine efficiency = 80% pump efficiency = 78% calculate the thermal efficiency of the combined cycle. what is the temperature of the exhaust leaving the hrsg?

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.