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Multi-Objective Optimization of Organic Rankine Cycle Power Plants Using Pure and Mixed Working Fluids

Author

Listed:
  • Jesper G. Andreasen

    () (Technical University of Denmark, Building 403, Nils Koppels Allé, DK-2800 Kgs. Lyngby, Denmark)

  • Martin R. Kærn

    () (Technical University of Denmark, Building 403, Nils Koppels Allé, DK-2800 Kgs. Lyngby, Denmark)

  • Leonardo Pierobon

    () (Technical University of Denmark, Building 403, Nils Koppels Allé, DK-2800 Kgs. Lyngby, Denmark)

  • Ulrik Larsen

    () (Department of Shipping and Marine Technology, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden)

  • Fredrik Haglind

    () (Technical University of Denmark, Building 403, Nils Koppels Allé, DK-2800 Kgs. Lyngby, Denmark)

Abstract

For zeotropic mixtures, the temperature varies during phase change, which is opposed to the isothermal phase change of pure fluids. The use of such mixtures as working fluids in organic Rankine cycle power plants enables a minimization of the mean temperature difference of the heat exchangers, which is beneficial for cycle performance. On the other hand, larger heat transfer surface areas are typically required for evaporation and condensation when zeotropic mixtures are used as working fluids. In order to assess the feasibility of using zeotropic mixtures, it is, therefore, important to consider the additional costs of the heat exchangers. In this study, we aim at evaluating the economic feasibility of zeotropic mixtures compared to pure fluids. We carry out a multi-objective optimization of the net power output and the component costs for organic Rankine cycle power plants using low-temperature heat at 90 ∘ C to produce electrical power at around 500 kW. The primary outcomes of the study are Pareto fronts, illustrating the power/cost relations for R32, R134a and R32/R134a (0.65/0.35 mole ). The results indicate that R32/R134a is the best of these fluids, with 3.4 % higher net power than R32 at the same total cost of 1200 k$.

Suggested Citation

  • Jesper G. Andreasen & Martin R. Kærn & Leonardo Pierobon & Ulrik Larsen & Fredrik Haglind, 2016. "Multi-Objective Optimization of Organic Rankine Cycle Power Plants Using Pure and Mixed Working Fluids," Energies, MDPI, Open Access Journal, vol. 9(5), pages 1-15, April.
  • Handle: RePEc:gam:jeners:v:9:y:2016:i:5:p:322-:d:69000
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    References listed on IDEAS

    as
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    Cited by:

    1. repec:eee:energy:v:151:y:2018:i:c:p:715-728 is not listed on IDEAS
    2. Lee, Sangick, 2017. "Multi-parameter optimization of cold energy recovery in cascade Rankine cycle for LNG regasification using genetic algorithm," Energy, Elsevier, vol. 118(C), pages 776-782.
    3. Oyeniyi A. Oyewunmi & Christos N. Markides, 2016. "Thermo-Economic and Heat Transfer Optimization of Working-Fluid Mixtures in a Low-Temperature Organic Rankine Cycle System," Energies, MDPI, Open Access Journal, vol. 9(6), pages 1-21, June.
    4. Markus Preißinger & Dieter Brüggemann, 2017. "Thermoeconomic Evaluation of Modular Organic Rankine Cycles for Waste Heat Recovery over a Broad Range of Heat Source Temperatures and Capacities," Energies, MDPI, Open Access Journal, vol. 10(3), pages 1-23, February.

    More about this item

    Keywords

    organic Rankine cycle; zeotropic mixture; multi-objective optimization; cost estimation; heat exchanger design; low temperature heat;

    JEL classification:

    • Q - Agricultural and Natural Resource Economics; Environmental and Ecological Economics
    • Q0 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - General
    • Q4 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy
    • Q40 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - General
    • Q41 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Demand and Supply; Prices
    • Q42 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Alternative Energy Sources
    • Q43 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Energy and the Macroeconomy
    • Q47 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Energy Forecasting
    • Q48 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Government Policy
    • Q49 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Other

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