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Techno-economic optimization of a geothermal ORC with novel “Emeritus” heat rejection units in hot climates

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  • Astolfi, M.
  • La Diega, L. Noto
  • Romano, M.C.
  • Merlo, U.
  • Filippini, S.
  • Macchi, E.

Abstract

The present work aims to investigate the potential advantages in using a novel wet and dry configuration for heat rejection units in ORC power plants. The reference case is a geothermal power plant that exploits a low temperature brine and uses a closed loop of cooling water to release the condensation heat to the ambient. In the calculations, the off-design operation of the whole plant is optimized from a techno-economic point of view with a realistic part-load behavior of the ORC and the use of experimentally validated correlations for the heat rejection section. The performance attainable with the novel LU-VE Emeritus® unit equipped with a water spray system and adiabatic panels is compared with those achievable with the same unit in dry operation. Final results show a marked increase of electricity production as well as of revenues with Emeritus® units with respect to a dry unit.

Suggested Citation

  • Astolfi, M. & La Diega, L. Noto & Romano, M.C. & Merlo, U. & Filippini, S. & Macchi, E., 2020. "Techno-economic optimization of a geothermal ORC with novel “Emeritus” heat rejection units in hot climates," Renewable Energy, Elsevier, vol. 147(P3), pages 2810-2821.
    • Handle: RePEc:eee:renene:v:147:y:2020:i:p3:p:2810-2821
    DOI: 10.1016/j.renene.2019.01.065
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    References listed on IDEAS

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    Cited by:

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    2. Pallis, Platon & Varvagiannis, Efstratios & Braimakis, Konstantinos & Roumpedakis, Tryfonas & Leontaritis, Aris - Dimitrios & Karellas, Sotirios, 2021. "Development, experimental testing and techno-economic assessment of a fully automated marine organic rankine cycle prototype for jacket cooling water heat recovery," Energy, Elsevier, vol. 228(C).

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