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Concentrating solar powered transcritical co2 power generation cycle for the union territory of ladakh, india

Hoque, SJ and Kumar, P and Dutta, P (2023) Concentrating solar powered transcritical co2 power generation cycle for the union territory of ladakh, india. In: International Journal of Energy for a Clean Environment, 24 (4). 17- 40.

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Official URL: https://doi.org/10.1615/INTERJENERCLEANENV.2022043...


High solar irradiation, cloud-free dry climate, abundant barren land, and low ambient temperature make the Union Territory of Ladakh, India, suitable for concentrating solar thermal power (CSP) plants. The present study comprehensively analyzes a 5 MW transcritical CO2 Rankine cycle power tower CSP plant. Low ambient temperature of the region allows transcritical operation, which provides high cycle efficiency. The study focuses on five aspects: solar field and thermal energy storage (TES), thermodynamic cycle simulation, turbomachines, and off-design performance analysis. Modeling and optimization of the solar field are undertaken to capture the diurnal and annual variations of direct normal irradiation levels using System Advisor Model open source software. Molten salt TES is integrated to overcome the dynamic variations of solar energy by providing stable operations and additional hours. The effect of storage sizes, starting from no storage to 12 hours, on the solar field size and specifications is also assessed. An in-house algorithm is developed for thermodynamic cycle optimization, exergy analysis, and off-design operations. The turbomachines of the cycle are designed using in-house meanline codes, and 3D CFD simulations are conducted for efficiency estimations. The effects of ambient temperature variations on the low side saturation pressure, cycle efficiency, and power output are evaluated. The proposed plant offers annual optical efficiency of 54.1, thermal efficiency of 36.5, and overall efficiency of 19.7.

Item Type: Journal Article
Publication: International Journal of Energy for a Clean Environment
Publisher: Begell House Inc.
Additional Information: The copyright of this article belongs to Begell House Inc.
Keywords: Carbon dioxide; Heat storage; Irradiation; Machine design; Open source software; Solar thermal energy; Temperature; Thermal energy; Thermoelectric power plants; Concentrating solar thermal power; Cycle simulation; Low ambient temperatures; Renewable energies; Solar fields; Supercritical CO2; Thermal storage; Thermodynamic cycle; Thermodynamic cycle simulation; Transcritical; Open systems
Department/Centre: Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 09 Jun 2023 11:08
Last Modified: 09 Jun 2023 11:08
URI: https://eprints.iisc.ac.in/id/eprint/81860

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