Water is the working fluid for a Rankine cycle process where the turbine and thepump haveisentropic efficiencies of 85% and 70%, respectively. Superheated vapor enters theturbine at8MPa and 500 C. The condenser pressure is 7:5 kPa. The net power output of thecycle is100MW. Determine for the cycle:a) the mass flow rate of the steam [kg-s], for a net power output of 100MW.b) the rate of heat transfer [MW] to the working fluid passing through the steamgenerator.c) the thermal efficiency.d) the mass flow rate of the condenser cooling water [kg-h], if the cooling waterenters the condenser at 15 C and exits at 35 C, with negligible pressure changeA simple ideal Rankine cycle with water as the working fluid operates between the specified pressureLimits(15MPA, 100KPA). The power produced by the turbine, the heat added in the boiler, and thethermal efficiency of thecycle are to be determined.

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the working fluid for a Rankine cycle process where the turbine and t we c efficiencies of 85% and 70%, respectively. Superheated vapor enter d 500 C. The condenser pressure is 7:5 kPa. The net power output of Determine for the cycle: ass flow rate of the steam [kg=s], for a net power output of 100MW. te of heat transfer [MW] to the working fluid passing through the ste r. ermal efficiency. ass flow rate of the condenser cooling water [kg3h], if the cooling wa e condenser at 15 C and exits at 35 C, with negligible pressure char

the working fluid for a Rankine cycle process where the turbine and t we c efficiencies of 85% and 70%, respectively. Superheated vapor enter d 500 C. The condenser pressure is 7:5 kPa. The net power output of Determine for the cycle: ass flow rate of the steam [kg=s], for a net power output of 100MW. te of heat transfer [MW] to the working fluid passing through the ste r. ermal efficiency. ass flow rate of the condenser cooling water [kg3h], if the cooling wa e condenser at 15 C and exits at 35 C, with negligible pressure char

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

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

Water is the working fluid for a Rankine cycle process where the turbine and the
pump have
isentropic efficiencies of 85% and 70%, respectively. Superheated vapor enters the
turbine at
8MPa and 500 C. The condenser pressure is 7:5 kPa. The net power output of the
cycle is
100MW. Determine for the cycle:
a) the mass flow rate of the steam [kg-s], for a net power output of 100MW.
b) the rate of heat transfer [MW] to the working fluid passing through the steam
generator.
c) the thermal efficiency.
d) the mass flow rate of the condenser cooling water [kg-h], if the cooling water
enters the condenser at 15 C and exits at 35 C, with negligible pressure change
A simple ideal Rankine cycle with water as the working fluid operates between the specified pressure
Limits(15MPA, 100KPA). The power produced by the turbine, the heat added in the boiler, and the
thermal efficiency of the
cycle are to be determined.

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Power generation using steam is one of the most common method which can be found around the world. In these type of power plants, steam goes through a basic thermodynamic cycle called Rankine cycle which is shown in the following figure. Steam flow Boiler Qin Pump Wout Win Condenser •Qout For the proper operation of the cycle, water should be pumped to the boiler using pump which required work input (Wm) generate steam and then high pressure steam is fed to the turbine. By extracting the energy from high pressure steam, turbine is producing work output (Wout). Because of this, the steam pressure is reduced and low pressure steam is flowing into the condenser. Condenser removes heat energy from steam further (Qout) and steam is converted into liquid water. The liquid water can be pumped into the boiler again and the cycle continues. Performance of a Ranking cycle can be evaluated by using thermal efficiency (nth)which is determined from; the cycle. Heat energy should be supplied to the…
thermodynamics
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