Cost and environmental benefits of coal-concentrated solar power (CSP) hybridization in India

Kamath, HG and Majumdar, R and Krishnan, AV and Srikanth, R (2022) Cost and environmental benefits of coal-concentrated solar power (CSP) hybridization in India. In: Energy, 240 .

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Abstract

The footprint of concentrated solar power (CSP) technology in the Indian energy mix is limited since the country mostly receives moderate direct normal irradiance (DNI) (3.5�4.5 kWh/m2/day) and the current capital costs are high. With simulations using an improved DNI database, we compare the cost-effectiveness of clean energy dispatch from stand-alone CSP with thermal energy storage (TES) and coal-CSP hybrid systems. The capital costs must be significantly reduced for the economic feasibility of stand-alone CSP-TES plants in India. The levelized cost of electricity (LCOE) and environmental advantages of coal-CSP hybrid systems are presented by simulating the hybrid system in two modes at three locations in India with contrasting DNI profiles. A fraction of turbine bleed-steam is partly/fully replaced by solar-assisted feedwater heating (SAFWH) in the booster mode, while the yield from burning coal is partly replaced by solar heat in the fuel saver mode. Results show that the cost of additional energy generated due to SAFWH in booster mode is up to 51.4 less as compared to a stand-alone CSP, even when operating at sites with moderate DNI. In the fuel saver mode, up to 40 thousand tons of coal can be annually saved with SAFWH, thus reducing CO2 emissions by 1.7 as compared to a stand-alone coal-fired plant. © 2021 Elsevier Ltd

Item Type:	Journal Article
Publication:	Energy
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the Elsevier Ltd.
Keywords:	Carbon dioxide; Coal storage; Cost effectiveness; Costs; Electric energy storage; Electric load dispatching; Environmental technology; Fossil fuel power plants; Heat storage; Hybrid systems; Solar energy, Capitals costs; CO 2 emission; Coal fired plants; Concentrated solar power; Direct normal irradiances; Feedwater; Levelized cost of electricities; Solar assisted; Solar assisted feedwater heating; Stand -alone, Coal, coal; electricity; energy storage; fuel; hybridization; solar power; turbine, India
Department/Centre:	Others
Date Deposited:	30 Sep 2022 12:28
Last Modified:	30 Sep 2022 12:28
URI:	https://eprints.iisc.ac.in/id/eprint/76884

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