NTPC Ltd, India’s largest integrated power generation company, has announced the launch of a CO2 battery energy storage project at NTPC Kudgi super thermal power station in Bijapur district of Karnataka. This project is undertaken by NETRA, the R&D wing of NTPC, and will be executed in collaboration with Triveni Turbine Ltd and Italy’s CO2 battery technology company Energy Dome.
CO2 battery with an energy storage capacity of 160 MWh will be set up at NTPC Kudgi. This project forms part of NTPC’s broader strategy to explore novel long-duration energy storage (LDES) technologies for providing cost-effective round-the-clock green power as it increases renewable power generation within its total capacity.
CO2 battery technology by Energy Dome uses no lithium or rare-earth elements to store electricity. Instead, it uses readily available, off-the-shelf components from reliable, existing supply chains, thus aligning with the Government of India’s ‘Make in India’ and ‘Atmanirbhar Bharat’ initiatives.
Unlike battery energy storage system, which is based on electrochemistry, CO2 battery is based on specialized electro-mechanical turbomachinery. It operates on ‘Closed Brayton Thermodynamic Cycle’ with anhydrous CO2 as the process fluid. Electricity is ‘charged’ and ‘discharged’ by manipulating ‘physical parameters’ of CO2 from vapor to liquid stage and vice-a-versa.
Gurdeep Singh, chairman & managing director, NTPC, said, “With several advantages, including very long lifetime (>25 years), no need of critical minerals like lithium and cobalt, topography agnostic, minimal performance degradation unlike BESS where intricate electrochemistry is involved, and very high depth of discharge (100%), successful demonstration of this technology shall open new vistas in the field of electrical energy storage.”
Claudio Spadacini, founder & CEO, Energy Dome, added that the CO2 Battery will further advance NTPC’s decarbonization goals and round-the-clock (RTC) power delivery while strengthening India’s local supply chain through domestic sourcing.
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