AUTHORS: Mohamed Elberry, Adel Abdel-Rahman, Abdelhamid Attia, Mohamed Teamah, Ahmed Elsafty

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ABSTRACT: The economic and environmental impacts of gas turbine inlet air cooling were investigated for Nubaria (around 130 km south East of Alexandria, Egypt) combined cycle power plant as a case study. Thermodynamic model was developed to simulate the combined cycle before and after the integration to the proposed single stage Li Br and H2O absorption cooling system. Inlet air-cooling by 10 oC can increase the annual power generation by 6.4 %. The 20-year Life Cycle Cost Analysis of the proposed integration indicates a net present value of MM$ 20 for each generation module with payback period of 3.5 years. Sensitivity analysis was conducted for potential changes in both fuel and electricity prices. Despite of the overall increase of the plant fuel demand by 6.5%, the specific fuel consumption has been decreased by 0.5 g / kWh from 164 g /kWh to 163.5 g/kWh. This decrease means an improvement of the combined cycle heat rate by 0.3%. This decrease in heat rate means a considerable reduction in CO2 emissions (30 kton / year) hence improving the plant environmental footprint.

KEYWORDS: Absorption Chiller, Turbine Inlet Air Cooling, Economic, Payback, Environmental Analysis

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