Performance analysis of phase change slurries for closed-loop geothermal system

Vikram Soni, Alireza Darzi, Hannah McPhee, Sepehr Saber, Mohammad Zargartalebi, Jason Riordon, Adnan Ozden, Michael Holmes, Vlad Zatonski, Matthew Toews and David Sinton

Renewable Energy, 2023, vol. 216, issue C

Abstract: Geothermal energy offers a route to clean power generation with baseload reliability that is unique among renewable sources. Current geothermal energy systems employ water, brine, or CO2 as a working fluid and rely on sensible heating to extract energy. In this work, latent heat based phase change slurries (PCSs) are assessed as geo-fluids for use in closed-loop geothermal systems. The PCS property data and its thermal, physical, chemical, and rheological behaviour at reservoir-relevant high-pressure and high-temperature conditions are studied. The experimental data is further used to model the viability of PCS-based closed-loop geothermal. The thermal output performance of PCSs is assessed and optimized in comparison to water. The resulting strategy achieves a 12.5% enhancement in thermal output compared to the water base case. The additional thermal power gain achieved with the PCS motivates further advancement in geo-fluids for geothermal energy systems.

Keywords: Closed-loop geothermal; Phase change materials; Emulsions; Thermal performance (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:216:y:2023:i:c:s0960148123009588

DOI: 10.1016/j.renene.2023.119044

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