An electricity generating installation uses a francis turbine with a rotational speed of 1260 rpm. the net head across the turbine is 124m and the volume flow rate is 0.5 m3/s. the radius of the runner is 0.6 m, the height of the runner vanes at inlet is 0.03 m and the angle of the inlet guide vanes is set at 72â° from the radial direction. assuming that the absolute flow velocity is radial at exit, find the torque and power exerted by the water. calculate the hydraulic efficiency.

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

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?

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature