Answered: Combustion air compressor T1-298 K P1 =…

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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➢ Based on the study of Thermal Engines, analyze the following problem regarding a gas turbine:

a) Siemens gas turbine (information in the attached data sheet of the Siemens STG-750 Turbine);

b) The products of combustion pass through the recovery boiler generate superheated steam that feeds a steam turbine (P10 = choose a pressure and T10 = 300°C). The flue gas flow rate and the temperature of the gases at the inlet of the recovery boiler is defined in the data sheet of the gas turbine (Siemens STG-750 Turbine).

c) The flow rate of superheated steam produced in the recovery boiler shall be defined.

d) The flue gas temperature at the outlet of the recovery boiler shall not be lower than 230 °C.

e) The steam turbine is a back-pressure turbine (choose the pressure at the turbine outlet – point 12);

f) 15% of the steam is extracted from the turbine at an intermediate pressure (P=1.5MPa)

g) The steam from the turbine outlet and the steam that has passed through the regenerator feed a cogeneration process that requires thermal energy. After supplying the process energetically, the steam leaves the cogeneration system as wet steam with a 40% titer

h) As the steam that has left the cogeneration system still contains a steam phase, it will be necessary to carry out condensation before it is pumped through the surface regenerator.

i) Assume that the isentropic efficiencies of the compressor and the turbine of the Gas Turbine are equal to 85% and 90% respectively.

(j) Assume that the isentropic efficiency of the steam turbine is equal to 90%. Treat the pump as being isentropic.

k) In the analysis, the use of diesel or natural gas can be adopted (choose)

➢ Based on the data above, analyze:

1) Determine the percentage value of the power that the compressor requires in relation to the power that the turbine (component of the gas turbine) produces;

2) What is the fuel consumption in the gas turbine?

3) What thermal energy is available in the cogeneration system?

4) What is the mechanical power produced by the sum of the two heat engines?

5) What is the efficiency of the cycle with cogeneration?

***The data regarding the turbine used and the system analyzed are in the attached image