Q2. At a stage of reaction turbine, the mean rotor diameter is 1.4 The speed ratio is 0.7. Determine the blade inlet angle if the blade outlet angle is 20°. The rotor speed is 3000 rpm. Also find the stage efficiency. Find the stage efficiency and rotor speed if the rotor is designed to run at the best theoretical speed ratio. Assume Parsons turbine and expansion losses as 10% of heat drop. (50°, 90%, 90%)

A galvanized-iron pipe (ε = 0.0005 ft) is to carry air at standard temperature and pressure at a rate of 2.0 ft3/s. The pressure drop is to be no more than 0.50 psi per 100 ft. Design the pipe diameter.

1. A Rankine cycle with reheating has a throttle pressure of 135 bars at the turbine inlet and 28 bars reheat pressure, the throttle and reheat temperature of the steam is 550C, condenser pressure is 0.035 bar, mass flow rate of steam is 10 kg/sec. Draw the T-s and schematic diagram of the cycle and determine the following: (c) theoretical thermal efficiency (d) the steam rate (e) heat rate of the cycle

An insulated piston-cylinder device contains 4 L of saturated liquid water at a constant pressure of 200 kPa. Water is stirred by a paddle wheel while a current of 8A flows for 50 min through a resistor placed in the water. If one-half of the liquid is evaporated during this constant-pressure process and the paddle-wheel work amounts to 300 kJ, determine the voltage of the source. Also, show the process on a P-v diagram with respect to the saturation lines.