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    ENERGY MANAGEMENT AND 4E ANALYSIS OF A SOLAR HYBRID GAS TURBINE POWER PLANT IN IRAQ
    (2024-05) Al-Tekreety, Wadah Talal Taha
    Improving a polygeneration arrangement and variation of Iraq's electricity system is a strategic goal, with a critical requirement on increasing the use of renewable energy sources. This research focuses on integrating waste heat recovery, solar energy, and an absorption refrigeration cycle for the Al-Qayara gas turbine power plant, offering a novel way to increase efficiency. The current configuration uses the exhaust gases from the Al-Qayyarah gas turbine power plant and the PTC field to generate steam using a high recovery steam generation process and an absorption refrigeration cycle that supplies low-temperature air to the Brayton cycle. A thermoeconomic analysis of the 4E (energy, exergy, exergoeconomic, and environmental studies for the Al Qayyarah power plant configurations) has been conducted. The power produced by the NGCC, ISCC, and ISCC-ARC systems is 489 MW, 554.6MW, and 581.1 MW, respectively; the power generated by the system grows by 34.2 MW when an ARC is added, with overall energy and exergy efficiencies of 44.76% and 43.22% for NGCC, 50.89% and 49.14% for the ISCC, and 51.15% and 49.4% for the ISCC-ARC. The overall specific costs for the ISCC-ARC system range from 62.33 $/MWh in June to 72.18 $/MWh in December, with similar fluctuations observed for the ISCC system, ranging from 70.08 $/MWh in June to 76.79 $/MWh in December. Also, for the NGCC, ranging from 79.4 $/MWh in June to 80.05 $/MWh in December. The environmental analysis depends on the release of carbon dioxide in the system during the year. Emissions have been declining with infrequent fluctuations compared to the emission for CO2 through the year of ISCC-ARC, which changed from 405.3 kgCO2/MWh in December and 373.5 kgCO2/MWh in June and changed from 439.7 kgCO2/MWh in December and 447.4 kgCO2/MWh in June for the NGCC.