Browsing by Subject "Organic Rankine cycles"

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    Performance analysis of a novel solar energy-based combined plant for alternative fuels production
    (John Wiley and Sons Ltd, 2021) Corumlu V.; Ozturk M.
    This paper proposes the design of a new solar power-based multigeneration system for generating hydrogen, ammonia, methane, and other beneficial outputs. This combined plant consists of the solar plant, Rankine cycle, organic Rankine cycle, single-effect absorption with ejector, carbon dioxide capture, hydrogen, ammonia, methane, drying, hot, and freshwater generation plants. The overall plant is investigated utilizing the Engineering Equation Solver software. The energy and exergy efficiencies of the integrated plant are computed as 0.6689 and 0.6227. In addition, the largest exergy destructions in the system are 6924 and 4037 kW, which occur at the Rankine cycle and solar power cycle, respectively. Moreover, the thermodynamic performance of the combined plant is investigated through parametric works and the impacts of plant working conditions on the plant efficiencies are evaluated. © 2021 John Wiley & Sons Ltd.
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    A new experimentally developed integrated organic Rankine cycle plant
    (Elsevier Ltd, 2021) Sorgulu F.; Akgul M.B.; Cebeci E.; Yilmaz T.O.; Dincer I.
    In this study, an organic Rankine cycle (ORC) integrated with a combustion subsystem and a horizontal belt-type drying unit is developed, built, and tested at a pilot scale for organic wastes to energy applications. The organic wastes used for experimental investigation are chicken manure collected from the respective food sector. A novel drying unit is also employed to dry out the chicken manure to the desired moisture level for more efficient and effective combustion. The heat generated is further supplied to the ORC for power generation. Finally, the heat rejected from ORC is used for chicken manure drying purposes. This way, the ORC generates two useful commodities like electricity and heat. An amount of 400 ton/day chicken manure from almost 4 million chickens is burned to obtain heat. The heat obtained from the combustor is utilized in an organic Rankine cycle with a capacity of 2.3 MW net power. The integrated ORC system is analyzed comprehensively through energy and exergy approaches, and its environmental impact assessment is performed. A detailed efficiency evaluation is carried out by considering energy and exergy efficiency approaches. The overall energy and exergy efficiencies of the integrated system are determined as 29.45% and 28.05%, respectively. For the ORC specifically, the energy and exergy efficiencies are calculated as 90.58% and 62.60% by considering the cycle as a cogeneration unit. © 2021 Elsevier Ltd