Hybrid solar–geothermal power generation: Optimal retrofitting

Hadi Ghasemi, Elysia Sheu, Alessio Tizzanini, Marco Paci and Alexander Mitsos

Applied Energy, 2014, vol. 131, issue C, 158-170

Abstract: A model is developed for an existing organic Rankine cycle (ORC) utilizing a low-temperature geothermal brine including the performance characteristics of the components. The model is validated with a set of 7200 operation data collected in one-year. The operation of the ORC is optimized allowing for variable number of working turbines. The developed model is retrofitted with a low-temperature solar trough system. A new hybridization strategy is developed that achieves a significant boost in the net output power of the system compared to the geothermal ORC. This hybridization approach enables better extraction of geothermal energy. The hybrid system shows higher second-law efficiency (up to 3.4% difference) compared to combined individual geothermal and solar systems. With this hybridization approach, the hybrid system is a better option than individual geothermal and solar system at all ambient temperatures.

Keywords: Organic Rankine cycle; Geothermal energy; Solar energy; Parabolic trough; Retrofit (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (22)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:131:y:2014:i:c:p:158-170

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DOI: 10.1016/j.apenergy.2014.06.010

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