Thermodynamic assessment of a geothermal power and cooling cogeneration system with cryogenic energy storage

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dc.authorid0000-0002-6634-9438
dc.authorid0000-0002-5885-790X
dc.authorid0000-0002-1397-3982
dc.contributor.authorCetin, Tugberk Hakan
dc.contributor.authorZhu, Jie
dc.contributor.authorEkici, Ekrem
dc.contributor.authorKanoglu, Mehmet
dc.date.accessioned2026-01-24T12:31:08Z
dc.date.available2026-01-24T12:31:08Z
dc.date.issued2022
dc.departmentAlanya Alaaddin Keykubat Üniversitesi
dc.description.abstractGeothermal energy is one of the main renewable energy sources for power generation and district cooling, and liquid air energy storage is an emerging technology suitable for both power and cold storages. Accordingly, a combined power and cooling cogeneration system with cryogenic energy storage is proposed in this paper, which is powered by geothermal energy and connected with the grid. The system is formed by integrating a turbine ejector cogeneration cycle with an air liquefaction cycle, a liquid air direct expansion cycle and a cryogenic organic Rankine cycle. In normal operation mode, only the turbine ejector cogeneration cycle works in the system based on the cooling load requirement. In charging operation mode, all the power produced in the system is used to liquefy air in the air liquefaction cycle owing to cheap electricity tariff. In discharging operation mode, the additional electricity is provided to meet peak time energy requirement by the direct expansion cycle and cryogenic organic Rankine cycle. A geothermal source at 180 degrees C with a flow rate of 100 kg/s is used as the heat source in this study, the cogeneration system has the ability to produce 15,470 kW of power and supply 4800 kW of cooling simultaneously, the system round trip efficiency is 41.07%, and the exergy efficiency of cryogenic energy storage is 60.43%. Also, the effects of geothermal energy temperature, system size, turbine mass split ratio and normalized mass flow rate on the system performance are clarified.
dc.description.sponsorshipTUBITAK [2213/A]; Turkish Ministry of National Education
dc.description.sponsorshipThe financial supports from TUBITAK under 2213/A-Overseas Graduate Scholarship Program and Turkish Ministry of National Edu-cation are gratefully acknowledged by Authors.
dc.identifier.doi10.1016/j.enconman.2022.115616
dc.identifier.issn0196-8904
dc.identifier.issn1879-2227
dc.identifier.scopus2-s2.0-85130229480
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.enconman.2022.115616
dc.identifier.urihttps://hdl.handle.net/20.500.12868/5681
dc.identifier.volume260
dc.identifier.wosWOS:000803711400001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofEnergy Conversion and Management
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20260121
dc.subjectCombined power and cooling
dc.subjectEnergy storage
dc.subjectCryogenics
dc.subjectGeothermal energy
dc.subjectLiquid air
dc.titleThermodynamic assessment of a geothermal power and cooling cogeneration system with cryogenic energy storage
dc.typeArticle

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