Chapter 7, Problem 7.15P

o At the inlet to a certain nozzle, the enthalpy of the gas is 3000 kJ/kg and velocity is negligible. At the discharge end of the nozzle, the enthalpy is 2762 kJ/kg. The nozzle is horizontal and flow through the nozzle is adiabatic find the velocity of gas at the nozzle exit.

Find the quality and internal energy of steam at 700 kPa and enthalpy of 2600 kJ/kg.

A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 350°C and velocity of 15 m/s. The exit is at 100 kPa, x = 1 and very low velocity. Find the specific work and the power produced.

A steam with a quality of 49%, enters an adiabatic nozzle at 3.5 MPa and leaves at 0.4 MPa and 140 oC with a flow of 7 m/s. Find the entrance velocity, in m/s.

3) A steam with a quality of 49%, enters an adiabatic nozzle at 3.5 MPa and leaves at 0.4 MPa and 140°C with a flow of 7 m/s. Find the entrance velocity, in m/s.

0.02 kg / s entering a radial flow compressor at 100 kPa and 280 K air is compressed to a pressure of 600 kPa. 16 kJ / kg heat loss during process change is happening. Since the power required to run the compressor is 2.732 kW, the kinetic and find the temperature in the final state neglecting the potential energy changes.

The power of a steam turbine in a thermal power plant is 60 MW. Water vapor enters the turbine at 3MPa pressure, 4000C temperature and 50 m / s speed, 10 kPa pressure, 0.9 dry degree and 200 m / s speed leaves the turbine. Considering the turbine as adiabatic; 1-Find the mass flow of steam 2-Find the turbine outlet cross-sectional area, its ratio (A2 / A1) to the inlet cross-sectional area.

Q6) One kg of air is allowed to expand reversibly in a cylinder behind a piston in an isothermal process at 260°C, while the volume is doubled. The piston is then moved and heat rejected at constant pressure until the volume is the same as it was initially. Find the heat flow and the overall change of entropy.

An adiabatic turbine has an efficiency of 90%. If air is compressed from 1100kpa and 227 degree Celsius to 101kpa. Find the work done and final temperature. Sketch process on T-S diagram.