Abstract
In this paper, we investigated a thermodynamic model of the regeneration gas turbine cycle with nitrogen supplied during the compression process. A suitable quantity of nitrogen that comes from the air separation cycle (Linde cycle) is injected between the stages of the compressor where it is evaporated, then the nitrogen and air mixture enters into the combustion chamber where it is burned and expanded in the turbine. We used this method to reduce greenhouse gases and improve gas turbine efficiency. In this work, we evaluated the operational data of the regeneration gas turbine cycle and the maximum amount of nitrogen that can be injected into the compressor. We also investigated the performance variation due to nitrogen spray into the compressor, and the effect of varying ambient temperature on the performance of gas turbines (thermal efficiency, power), as well as a comparison between the normal gas turbine cycle, and the remodelled compression cycle. The exergy analysis shows that the injection of the nitrogen will increase exergy destruction. The results demonstrated an 8% increase in the efficiency of the cycle, furthermore, CO2 emission decreased by 11% when the nitrogen was injected into the compressor.
Highlights
Gas turbine technology is commonly used with several methods
The injection of steam into the combustion chamber has demonstrated a common way to improve the performance of gas turbine power plants, increasing both the efficiency and the power output due to increased mass flowing through the turbine while at the Corresponding author: E
We carried out an analysis of the energy and exergy for the regeneration gas turbine combined with the air separation cycle (Linde cycle)
Summary
Gas turbine technology is commonly used with several methods. Different modification has been used to improve gas turbine performance. Several methods show success in improving and maintaining the performance of the gas turbine cycle with steam injected at various points in the cycle [5]. The injection of steam into the combustion chamber has demonstrated a common way to improve the performance of gas turbine power plants, increasing both the efficiency and the power output due to increased mass flowing through the turbine while at the Corresponding author: E. H. Betelmal Affiliation: Department of Mechanical Engineering Tripoli University, Faculty of engineering Tripoli-Libya
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