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Comparative analysis of low and high pressure water electrolysis using nuclear waste heat for sustainable hydrogen production in India

Rupsha Bhattacharyya, Sandeep K C, Sachin Kamath, Krunal Mistry


Hydrogen has been proposed as a clean and sustainable vector of the decarbonized energy system of the near future. Generation of hydrogen gas from a relatively easily available resource like water through low temperature water electrolysis is a simple, technologically mature alternative for realizing the vision of hydrogen economy. This work examines the techno-economic feasibility aspects of a water electrolysis based hydrogen production plant when coupled with typical nuclear power plants in India. Nuclear waste heat is proposed as the primary energy source to be converted to electricity via thermoelectric generators. Using only waste heat based electrical power, electrolysis at low pressure with subsequent gas compression and at high pressure without further gas compression has been considered for cost benefit analyses. Costs of transporting the hydrogen to those potential consumer hubs around the power plants have also been estimated, where additional booster compressors will not be required. This analysis is expected to be useful in making policy decisions regarding sustainable production and use of hydrogen energy in India in the near future

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