CONCENTRATING SOLAR POWERED TRANSCRITICAL CO<sub>2</sub> POWER GENERATION CYCLE FOR THE UNION TERRITORY OF LADAKH, INDIA

Syed Jiaul Hoque; Pramod Kumar; Pradip Dutta

doi:10.1615/InterJEnerCleanEnv.2022043269

International Journal of Energy for a Clean Environment

Главный редактор: Ashwani K. Gupta (open in a new tab)

Исполнительный редактор – Южная Америка: Marcelo J.S. de Lemos (open in a new tab)

Управляющий редактор: Andrey Kuzmin (open in a new tab)

Выходит 8 номеров в год

ISSN Печать: 2150-3621

ISSN Онлайн: 2150-363X

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CONCENTRATING SOLAR POWERED TRANSCRITICAL CO₂ POWER GENERATION CYCLE FOR THE UNION TERRITORY OF LADAKH, INDIA

Том 24, Выпуск 4, 2023, pp. 17-40

DOI: 10.1615/InterJEnerCleanEnv.2022043269

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Syed Jiaul Hoque
Thermal Systems Laboratory, Department of Mechanical Engineering, Indian Institute of Science, Bangalore-560012, India

Pramod Kumar
Department of Mechanical Engineering, Indian Institute of Science, Bangalore-560012, India; Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bangalore-560012, India

Pradip Dutta
Department of Mechanical Engineering, Indian Institute of Science, Bangalore-560012, India; Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bangalore-560012, India

Краткое описание

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%.

Ключевые слова: renewable energy, supercritical CO₂, thermal storage, recuperator, thermodynamic cycle simulation

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