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    Exergy analysis of a circulating fluidized bed power plant co-firing with olive pits: A case study of power plant in Turkey
    (Pergamon-Elsevier Science Ltd, 2017) Topal, Huseyin; Taner, Tolga; Naqvi, Syed Arslan Hassan; Altinsoy, Yelda; Amirabedin, Ehsan; Ozkaymak, Mehmet
    The effects of the above-mentioned parameters on exergy destruction, and CO2 emission of the power plant are determined for circulating fluidized bed power plant co-firing. The aim of this study is to perform thermodynamic analysis on can Circulating Fluidized Bed Power Plant (CFBPP) co-fired with olive pits. The results of this study also show that the total exergy damage of the plant is about 295 MW and the net exergy yield is 31.26%. The majority (252.40 MW) of exergy destruction occurs in the main boiler and accounts for 86.05% of the total exergy breakdown of CFBPP through exergy analysis. The results show that CFBPP has an effective feature of biomass supplement for exergetic performance and CO2 emissions. (C) 2017 Elsevier Ltd. All rights reserved.
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    Hydrogen Production through Alkaline Electrolyzers: A Techno-Economic and Enviro-Economic Analysis
    (Wiley-V C H Verlag Gmbh, 2023) Naqvi, Syed Arslan Hassan; Taner, Tolga; Ozkaymak, Mehmet; Ali, Hafiz Muhammad
    Hydrogen production through an alkaline electrolyzer as well as a techno-economic and enviro-economic analysis are presented. The proposal of this innovative study is to generate hydrogen gas energy from an alkaline electrolyzer energy system. The prototype of this alkaline electrolyzer was developed by application of hydrogen production through alkaline electrolyzer optimization. This novel chemical mixture is made up from the combination of ammonia, ethyl alcohol, urea, and deionized or distilled water. The result proved to be a model study by emphasizing the annual profit of the alkaline electrolyzer of a simple payback period of the prototype system. A prototype of alkaline electrolyzer is designed and developed to produce oxyhydrogen gas through water electrolysis.
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    OPTIMIZATION, EXPERIMENTAL PERFORMANCE AND TECHNO-ECONOMIC EVALUATION OF PEM AND ALKALINE ELECTROLYZERS
    (2022-12) Naqvi, Syed Arslan Hassan
    This study presents the highly efficient and innovative prototypes of a hydrogen generation system. The study was carried out on two types of water electrolyzers, Alkaline and PEM. The protype of both types of electrolyzers were developed to generate the Hydrogen gas in an efficient and cost-effective way. The prototype of the PEM electrolyzer was comparatively of larger scale, developed for the industrial application. The performance of both the electrolyzers was evaluated and amount of hydrogen production through these electrolyzers was calculated. The techno-economic as well as enviro-economic analyses were performed for these electrolyzers. The annual profit (?YY) and simple payback period (SPP) for these prototypes were also determined. A novel and special chemical mixture, made up from the combination of ammonia, ethyl alcohol, urea, and deionized or distilled water is used in this innovative study to increase the output of Hydrogen gas and reduce its cost. In PEM electrolyzer, the Cr-C coated SS304 bipolar plates were used in the electrolysis cells. The super strong magnets were also mounted on the outer surface of the electrolysis cells of both electrolyzers to improve the performance and efficiency. The performance of the electrolyzers was determined through the experiments and the optimization of the different parameters. In the small-scale study of Alkaline electrolyzer, the rate of hydrogen gas production was obtained as 6 g L-1 while the annual profit (?YY) is found to be as 1,771.14 € y-1 and the simple payback period (SPP) is calculated as 2.2 y. For Alkaline electrolyzer, the best results were obtained at 30 A current and 12 V voltage. On the other hand, PEM electrolyzer, the production of hydrogen gas (1 MW) for industrial scale was found to be as 6 m3 h–1, whereas the annual profit (?YY) and the simple payback period (SPP) were calculated as 646,000 € y–1 and 2.32 y respectively. The optimum results for PEM electrolyzer were obtained at 30 A current and 10 V voltage. These results indicate that this system can produce hydrogen more efficiently and economically. The rate of carbon emissions through this system is 0%, hence sustainable and environmentally friendly. ?