Optimal design of large-scale solar-aided hydrogen production process via machine learning based optimisation framework

•Four solar steam methane reforming alternatives are investigated.•Machine learning based optimisation framework is proposed to achieve optimal design.•Total annualised cost is reduced by 14.9 % ~ 15.1% in comparison to existing work.•CO2 emission decreases by 80.0 kt yr−1 than conventional steam me...

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