Water is the working fluid in a rankine cycle. superheated vapor enters the turbine at 10 mpa, 480°c, and the condenser pressure is 6 kpa. the turbine and pump have isentropic efficiencies of 80 and 70%, respectively.
determine for the cycle:
1. the rate of heat transfer to the working fluid passing through the steam generator, in kj/kg of steam flowing2. thermal efficiency3. the rate of heat transfer from the working fluid passing through the condenser to cooling water, in kj/kg of steam flowing

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

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?

The higher the astm grain size number, the finer the gran is. a)-true b)-false