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Multi-Objective Optimization of an Organic Rankine Cycle (ORC) for a Hybrid Solar–Waste Energy Plant

Author

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  • Lina Wang

    (School of Marine Technology and Environment, Dalian Ocean University, Dalian 116023, China)

  • Jun Yang

    (School of Marine Technology and Environment, Dalian Ocean University, Dalian 116023, China)

  • Bing Qu

    (School of Marine Technology and Environment, Dalian Ocean University, Dalian 116023, China)

  • Chang Pang

    (Department of Basic, Dalian Naval Academy, Dalian 116013, China)

Abstract

In pursuit of sustainable development and mitigation of the intermittency challenge associated with solar energy, this study proposes a hybrid solar system integrating waste heat incineration alongside solar power generation and distinct heat provision. Leveraging the superior energy efficiency of the organic Rankine cycle (ORC) in medium- and low-temperature scenarios, a parabolic trough collector (PTC) is selected for its cost-effectiveness and long-term operational reliability. Dowtherm A and toluene are identified as the optimal working fluids for the PTC and ORC, respectively. To optimize this complex system, a combination of artificial neural networks (ANNs) and multi-objective optimization via non-dominated sorting genetic algorithm II (NSGA-II) is employed, streamlining the optimization process. Thermal dynamic simulations are executed using Engineering Equation Solver (EES, V11) to validate the proposed system’s performance. TOPSIS is employed to identify the optimal solution from the Pareto frontier. The results indicate that the hourly cost of the system stands at USD 43.08, with an exergy efficiency of 22.98%. The economic analysis reveals that the solar collector constitutes the most significant portion of the total initial cost, representing 53.2%, followed by the turbine, thermoelectric generator (TEG), and waste heat incineration, in descending order of costliness.

Suggested Citation

  • Lina Wang & Jun Yang & Bing Qu & Chang Pang, 2024. "Multi-Objective Optimization of an Organic Rankine Cycle (ORC) for a Hybrid Solar–Waste Energy Plant," Energies, MDPI, vol. 17(8), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:8:p:1810-:d:1372947
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    References listed on IDEAS

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    1. Alirahmi, Seyed Mojtaba & Ebrahimi-Moghadam, Amir, 2022. "Comparative study, working fluid selection, and optimal design of three systems for electricity and freshwater based on solid oxide fuel cell mover cycle," Applied Energy, Elsevier, vol. 323(C).
    2. Nami, H. & Arabkoohsar, A., 2019. "Improving the power share of waste-driven CHP plants via parallelization with a small-scale Rankine cycle, a thermodynamic analysis," Energy, Elsevier, vol. 171(C), pages 27-36.
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    Cited by:

    1. Łukasz Witanowski, 2024. "Optimization of an Organic Rankine Cycle–Vapor Compression Cycle System for Electricity and Cooling Production from Low-Grade Waste Heat," Energies, MDPI, vol. 17(22), pages 1-19, November.
    2. Łukasz Witanowski, 2024. "Multi-Objective Optimization of a Small-Scale ORC-VCC System Using Low-GWP Refrigerants," Energies, MDPI, vol. 17(21), pages 1-18, October.

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