Abstract
Thermodynamic analysis of inlet air pre-cooling techniques of compressor is among the methods for the enhancement of gas turbine performance. This study compared the effect of using evaporative cooling system pre-cooling method, vapour compression refrigeration precooling and vapour absorption refrigeration precooling techniques to the gas turbine Net Power Output, Thermal efficiency, Thermal Efficiency Change factor (TEC) and Power Gain Ratio (PGR) taking into recognition the prevalent weather and climatic conditions of Nigeria and as well as optimization parameters for the reference system (i.e. without precooling techniques). The results show that at air temperature of 311K, the reference system, evaporative precooling, vapour compression refrigeration and vapour absorption refrigeration precooling methods recorded Net power Outputs of 23.143MW, 25.39MW, 31.84MW and 34.90MW respectively. The Thermal Efficiency Change factor recorded by the precooling systems at an ambient temperature of 311K is 8.68%, 37.4% and 51% respectively.
Highlights
Nigeria as a case study does not have a homogeneous climate and weather conditions
The main purpose of turbine inlet air precooling is to increase the net power output of the gas turbine when the ambient air temperature is higher than the standard conditions
The performance of the Gas turbine plant integrated with evaporative precooling system, vapour compression precooling system and vapour absorption precooling system are investigated
Summary
Nigeria as a case study does not have a homogeneous climate and weather conditions This indicates that the condition of climate in the Northern part is relatively different from Southern part. This study is important because it compares different precooling methods and recommends the method that will be appropriate for a particular region with regard to the particular climatic conditions. It is a well-known fact that gas turbines produce less power when the ambient temperature is hot. The main purpose of turbine inlet air precooling is to increase the net power output of the gas turbine when the ambient air temperature is higher than the standard conditions. By cooling the air at the compressor inlet below that of the https://www.ijoest.com ©International Journal of Engineering Science Technologies [13]
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