University of Basrah - College of Engineering Department of Mechanical Engineering Subject: Power Plant I Class: Fourth Examiner: Dr. Ahmad A. M Alsahlani Notes: Giving Sketches is compulsory wherever needed (Total Ma Q1] Answer the following que Exam: Final-Exam Date: 11/09/2023 Time: 2 Hours 1- Explain how the Geothermal Energy can be utilized to generate electricity. 2- State the two classifications of energy sources and give three examples for each. 3- State three advantages and three disadvantages of using Gas Turbine Power Plant. 4- What are the reasons that lead to a deviation in the ideal gas turbine cycle? 5- Draw a block diagram for a regenerative Rankin Cycle using one open feed water heater. Q2] A closed cycle gas-turbine power plant has a pressure ratio of 10. The air temperature is 35 C at the compressor inlet and 1127 C at the turbine inlet. The received energy at the Qi combustion chamber is 794 kJ/kg. Assume the isentropic efficiency of the turbine is 95%. Determine (a) the actual gas temperature at the exits of the compressor and the turbine, (b) the work ratio, and the thermal efficiency, (C) The isentropic efficiency of the compressor. Q3] A steam power plant operates on the reheat Rankin Cycle. Steam enters the high-pressure turbine at 10 MPa and 600 C and leaves at 2MPa. Steam is reheated at constant pressure to 450 C before it expanded in the low-pressure turbine. Steam leaves the low-pressure turbine at 1 bar and leave the condenser as a saturated liquid. Determine the 1- The work of each turbine 2- The work of pump 3- The cycle's thermal efficiency. 4- Draw T-S Diagram 2 Boiler 5 3 HPT LPT 1 Pump Condenser Examiner Dr. Ahmad A. M Alsahlam ment Dr. Hasanain Ibrahim Page 1 of 2 46:2645.65 6

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Chapter1: Basic Modes Of Heat Transfer
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University of Basrah - College of Engineering
Department of Mechanical Engineering
Subject: Power Plant I
Class: Fourth
Examiner: Dr. Ahmad A. M Alsahlani
Notes: Giving Sketches is compulsory wherever needed (Total Ma
Q1] Answer the following que
Exam: Final-Exam
Date: 11/09/2023
Time: 2 Hours
1- Explain how the Geothermal Energy can be utilized to generate electricity.
2- State the two classifications of energy sources and give three examples for each.
3- State three advantages and three disadvantages of using Gas Turbine Power Plant.
4- What are the reasons that lead to a deviation in the ideal gas turbine cycle?
5- Draw a block diagram for a regenerative Rankin Cycle using one open feed water
heater.
Q2]
A closed cycle gas-turbine power plant has a pressure ratio of 10. The air temperature is
35 C at the compressor inlet and 1127 C at the turbine inlet. The received energy at the Qi
combustion chamber is 794 kJ/kg. Assume the isentropic efficiency of the turbine is
95%. Determine (a) the actual gas temperature at the exits of the compressor and the
turbine, (b) the work ratio, and the thermal efficiency, (C) The isentropic efficiency of the
compressor.
Q3]
A steam power plant operates on the reheat
Rankin Cycle. Steam enters the high-pressure
turbine at 10 MPa and 600 C and leaves at
2MPa. Steam is reheated at constant pressure to
450 C before it expanded in the low-pressure
turbine. Steam leaves the low-pressure turbine at
1 bar and leave the condenser as a saturated
liquid. Determine the
1- The work of each turbine
2- The work of pump
3- The cycle's thermal efficiency.
4- Draw T-S Diagram
2
Boiler
5
3
HPT
LPT
1
Pump
Condenser
Examiner
Dr. Ahmad A. M Alsahlam
ment
Dr. Hasanain Ibrahim
Page 1 of 2
46:2645.65
6
Transcribed Image Text:University of Basrah - College of Engineering Department of Mechanical Engineering Subject: Power Plant I Class: Fourth Examiner: Dr. Ahmad A. M Alsahlani Notes: Giving Sketches is compulsory wherever needed (Total Ma Q1] Answer the following que Exam: Final-Exam Date: 11/09/2023 Time: 2 Hours 1- Explain how the Geothermal Energy can be utilized to generate electricity. 2- State the two classifications of energy sources and give three examples for each. 3- State three advantages and three disadvantages of using Gas Turbine Power Plant. 4- What are the reasons that lead to a deviation in the ideal gas turbine cycle? 5- Draw a block diagram for a regenerative Rankin Cycle using one open feed water heater. Q2] A closed cycle gas-turbine power plant has a pressure ratio of 10. The air temperature is 35 C at the compressor inlet and 1127 C at the turbine inlet. The received energy at the Qi combustion chamber is 794 kJ/kg. Assume the isentropic efficiency of the turbine is 95%. Determine (a) the actual gas temperature at the exits of the compressor and the turbine, (b) the work ratio, and the thermal efficiency, (C) The isentropic efficiency of the compressor. Q3] A steam power plant operates on the reheat Rankin Cycle. Steam enters the high-pressure turbine at 10 MPa and 600 C and leaves at 2MPa. Steam is reheated at constant pressure to 450 C before it expanded in the low-pressure turbine. Steam leaves the low-pressure turbine at 1 bar and leave the condenser as a saturated liquid. Determine the 1- The work of each turbine 2- The work of pump 3- The cycle's thermal efficiency. 4- Draw T-S Diagram 2 Boiler 5 3 HPT LPT 1 Pump Condenser Examiner Dr. Ahmad A. M Alsahlam ment Dr. Hasanain Ibrahim Page 1 of 2 46:2645.65 6
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