An ideal Rankine cycle with one stage of reheat utilizes steam as working medium. Boiler pressure is 4 MPa, the boiler exit temperature is 400°C, and the condenser pressure is 10 kPa. The reheat takes place at 0.4 MPa and the steam leaves the reheater at 400°C. (Enthalpies are in KJ/kg.). Determine the thermal efficiency of the cycle. Determine also the thermal efficiency if there is no reheater. The thermal efficiency is: Select one: O a. 35.60% O b. 36.73%

An ideal Rankine cycle with one stage of reheat utilizes steam as working medium. Boiler pressure is 4 MPa, the boiler exit temperature is 400°C, and the condenser pressure is 10 kPa. The reheat takes place at 0.4 MPa and the steam leaves the reheater at 400°C. (Enthalpies are in KJ/kg.). Determine the thermal efficiency of the cycle. Determine also the thermal efficiency if there is no reheater. The thermal efficiency is: Select one: O a. 35.60% O b. 36.73%

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

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.
An ideal Rankine cycle with one stage of reheat utilizes steam as working medium. Boiler pressure is 4 MPa, the boiler exit temperature is 400°C, and the condenser pressure is 10 kPa. The reheat takes place at 0.4 MPa and the steam leaves the reheater at 400°C. (Enthalpies are in KJ/kg.). Determine the thermal efficiency of the cycle. Determine also the thermal efficiency if there is no reheater. Without the reheater, the thermal efficiency is: Select one: O a. 35.29% O b. 32.95% O c. 34.51% O d. 33.15%
1. What is the Isentropic Work of the Steam using the Ideal Rankine Cycle when the system is set at 400 kPaa Boiler Pressure and 105 kPaa Condenser Pressure when the system is generating power at 9,500 seconds? 2. With the Turbine work output, what is the Isentropic efficiency of the Turbine from the above settings?
An ideal Rankine cycle operates between a steam boiler pressure of 18 MPa and a condenser temperature of 42 °C. The steam leaving the boiler is a saturated vapor. The net power generated by the cycle is 150 MW. What is the mass flow rate of steam? What is the cycle efficiency? Use the formula: n=Wnet/Qin.
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 mass flow rate of steam produced by the boiler. Assume an isentropic efficiency of 87% for both the turbine and the pump.
Please show the solution. Thank you very mmuch
In a reheat-regenerative Rankine cycle, the condenser pressure is 10 KPa. Steam enters the first turbine at 12.5 MPa and 500 oC. Steam is reheated at 3 MPa at the same temperature before entering the second turbine. For the regeneration, steam is extracted from the second turbine at 0.5 MPa to an open feedwater heater (OFWH). Draw the schematic and T-S diagrams. Label the points by setting point 1 at the condenser outlet, point 2 at the 1st pump (right after the condenser) outlet, point 3 at the OFWH outlet, point 4 at the 2nd pump outlet, point 5 at the boiler outlet, point 6 at the reheater inlet, point 7 at the reheater outlet, point 8 for the extraction of steam to OFWH and point 9 at the condenser inlet. Use 2 decimal places for the enthalpy, steam quality (%), thermal efficiency (%), and other energies. For the fraction of steam (y) and entropy (s), use 4 decimal places. For the specific volume, use 6 decimal places. USE THE STEAM TABLES FROM CENGEL'S BOOK ONLY 1.T-S Diagram 2…
QI) Consider a steam power plant that operates on a simple ideal Rankine cycle and has a net power output of 45 MW. Steam enters the turbine at 6 MPa and 500°C and is cooled in the condenser at a pressure of 20 kPa by running cooling water from a lake through the tubes of the condenser at a rate of 2000 kg/s. Show the cycle on a T-s diagram with respect to saturation lines, and determine: The thermal efficiency of the cycle?
In inserting an aluminum piston into a steel cylinder, it is given that the inside diameters of the cylinder and of the piston are 0.500 m and 0.4998 m, respectively, at 25OC. The temperature to which they are heated to obtain a perfect fit is 55.8 degrees celsius. Show the solution.
An ideal Rankine cycle with one stage of reheat utilizes steam as working medium. Boiler pressure is 4 MPa, the boiler exit temperature is 400°C, and the condenser pressure is 10 kPa. The reheat takes place at 0.4 MPa and the steam leaves the reheater at 400°C. (Enthalpies are in KJ/kg.). Determine the thermal efficiency of the cycle. Determine also the thermal efficiency if there is no reheater. The quality at the exhaust of the low pressure turbine is: Select one: O a. 13% O b. 97% O c. 3% O d. 87%
3) An ideal Rankine cycle with superheat and reheat has steam entering the turbine at 10 MPa and 440 °C. The steam is extracted and sent to the reheater at a pressure of 1.5 MPa, and returns to the turbine at 440 °C. The condenser pressure is 20 kPa. The cycle produces 400 MW of net power. Determine (a) the qualities of steam at (i) high pressure turbine exit, and (ii) low pressure turbine exit (b) the thermal efficiency, in % (c) the rate of heat transfer, into the working fluid as it passes through the boiler, in MW (d) the rate of heat transfer, from the condensing steam as it passes through the condenser, in MW (e) the mass flow rate of the condenser cooling water, in kg/ h, if cooling water enters the condenser at 12 Cand exits at 37 C