Chapter 8, Problem 8.1P

In an ideal Rankine cycle, steam is generated at 4.1 MPa and 480°C. The condenser is at 32°C. For an engine with the same end states, determine its mean effective pressure in kPa.

A power plant is to be operated on a Rankine Cycle with superheated steam exiting the boiler at 4 MPa and 500°C. The condenser pressure is 20 kPa.  Compute the specific steam consumption of the cycle in kg/kWh

A simple ideal Rankine cycle which uses water as the working fluid operates its condenser at 40C and its boiler at 300C. Calculate the work produced by the turbine, the heat supplied in the boiler, and the thermal efficiency of this cycle when the steam enters the turbine without any superheating.

Water enters the turbine of an ideal Rankine cycle as superheated vapor at 10 MPa and 600°C. If the condenser pressure is 10 kPa, Calculate the thermal efficiency of the system.

The net work for a given reheat Rankine cycle is 80MW. Steam at 10 MPa and 500C enters the first turbine and then, the second turbine at 1.2 MPa and 500C. Saturated liquid exits the condenser at 20 kPa.  Draw the schematic and T-S diagrams. Label the points by setting point 1 at the condenser outlet, point 2 at the pump outlet, point 3 at the boiler outlet, point 4 at the reheater inlet, point 5 at the reheater outlet, and point 6 at the condenser inlet. Use 2 decimal places for the enthalpy and other energies in solving and for the final answers. For the steam quality (x) and entropy (s), use 4 decimal places in solving. For the specific volume, use 6 decimal places. IMPORTANT: USE THE STEAM TABLES FROM CENGEL'S BOOK ONLY (uploaded already in the files section). Determine the following: Enthalpy at point 2 in kJ/kg  =  Enthalpy at point 4 in kJ/kg  =  Enthalpy at point 5 in kJ/kg  =  Enthalpy at point 6 in kJ/kg  =  Thermal Efficiency in %  =  Heat added in kJ/kg  =  Heat rejected in…

in an ideal rankine cycle, steam is generated at 4.1 mpa and 48°C. The condense is at 32°C. Determine the ideal pump work

Consider a 150-MW steam power plant that operates on a simple Rankine cycle. Steam enters the turbine at 7 MPa and 500°C and is cooled in the condenser at 10 kPa. Calculate the volume flow rate of sea water (S.G. = 1.05) used in the condenser, if the allowable temperature rise is 5°C. Assume an isentropic efficiency of 87% for both the turbine and the pump.

In a reheat cycle steam at 8.0 MPa and 485 degrees Celsius enters the turbine and expands to1.4 MPa. At this point, steam is withdrawn and passed through a reheater. It re-enters theturbine at 1.3 MPa and 720 degrees Celsius. Expansion now occurs to condenser pressure of6Kpa. Determine the Qa and the Cycle Efficiency.

In a Rankine cycle with reheating, the steam leaves the boiler at 2.5 MPa and 600 ºC and enters the high pressure turbine where it expands to a pressure of 1 MPa to be then subjected to a reheating process from where it leaves at 1 MPa and 600 ° C. The steam at these conditions enters the low pressure turbine and expands up to the condenser pressure of 50 kPa. The heat that is extracted in the condenser is 1500 kJ / s. If the adiabatic efficiency of the turbines and the pump is 95%, determine the total heat flow in kJ / s delivered to the boiler.