Sustainability of Integrated Solar Combined Cycle Systems on the Energy Transition in Algeria
Touenti, Mohamed Salah
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Economic development and high population growth are the causes of the increasing energy demand in Algeria. Algeria relies mainly on the fossil fuels to supply the increasing energy demand. Although this long adopted pattern ensures power accessibility at all times through the cheapest cost, it is unsustainable due to its extremist impact on the environmental emissions and depletion of the resources. Integrated Solar Combined Cycle power plants (ISCCs) among all other renewable energy technologies, composed of a Concentrated Solar Power (CSP) and a Natural Gas Combined Cycle (NGCC) power plant have the potential of replacing conventional power plants to reduce Carbon emissions and to integrate the costs of the solar power. A literature reviews of the current CSP technologies and their ability for integration into a conventional power cycles was illustrated, the best option was found is Parabolic Trough Collectors (PTC). This study evaluates the performance of the NGCC standalone and with integrating PTC using both configuration (Direct Steam Generation (DSG) and Heat Thermal Fluid (HTF)) in two different climates. Furthermore, an economic and environmental assessment is conducted in order to choose which configuration and climate are most suitable for the integration. The results have shown that the best levelized cost of electricity (LCOE) in the range of 3.79 to 3.97 c$/kWh and CO2 emissions saving of 106.092 to 120.301 tons /years were recorded with 20 % solar share using HFT configuration in Bechar compared to 3.78 to 4.06 c$/kWh and CO2 emissions saving of 106.623 to 141.330 tons /years using DSG configurations in Annaba. To deduce, both technologies in both locations are convenient to be installed. However, using DSG is more suitable solution to reduce CO2 emissions. The results from the study indicate that the ISCC plants can pave the way of renewables energies and on the same time reduce the environmental impact in our existing power plant systems.