Abstract
Population of the world is increasing and so the demand of energy for domestic and industrial use. Worldwide efforts are being meet to produce energy from renewable resources but it is impossible to replace the fossil fuel resource of energy. Gas turbine remains the main energy converter of fossil fuel both for its liquid and gaseous states. This paper analyzes the performance of a unit of an actual power plant situated at Riyadh, Saudi Arabia. The power plant has G.E. gas turbine units which operate as simple gas turbine units at peak demand periods and as a part of combined power plant unit at other periods of operation. The performance of the unit has been evaluated from the actual data from the unit obtained around the year. The study reveals that for gas turbine cycle an increase in compressor inlet temperature increases efficiency of compressor whereas turbine efficiency decreases. Exit temperature of the unit increases with the increase in inlet temperature of compressor that results in enhanced pollution. The exergy and energy efficiencies of the whole unit show dependence on compressor inlet temperature. Plant efficiency and mass of steam produced increase with the increase in the turbine inlet temperature.
Highlights
Demand for energy in the world is greater than ever before as it is the primary pillar of infrastructural and industrial growth in any country besides meeting the human energy demand
The variation of energy or first law efficiency of turbine and compressor of the unit with change in the inlet temperature is presented in the figure2
The energy efficiency of compressor decreases with the increase in compressor inlet temperature whereas turbine efficiency shows an increase with the increase in the inlet temperature
Summary
Demand for energy in the world is greater than ever before as it is the primary pillar of infrastructural and industrial growth in any country besides meeting the human energy demand. Huge quantities of hot are exhausted at the exit of turbine that contains huge energy These gases are wasted in units operating on simple cycle and results in environmental degradation. Pressure of the air at compressor exit and temperature of the hot gases at the entry and exhaust of the turbine are the important parameters that affect the performance of gas turbine. Simple gas turbine plants operating have high unit cost of generated electricity [5]. Et al, [17, 18] have carried out the thermodynamic analysis of a cogeneration gas turbine and desalination plant They found out that the pressure ratio of the compressor as well as the turbine inlet temperature is important parameters that have significant influence on the exergy efficiency of the gas turbine and the desalination unit.
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