How India's first hydrogen-powered train works | Explained

📌 Summary:

• Context: the Prime Minister flagged off India's first hydrogen-powered train on July 17, 2026, running on an 89-km stretch between Jind and Sonipat in Haryana; Railways Minister Ashwini Vaishnaw framed it as the latest chapter in Indian Railways' evolution from coal and steam to cleaner, sustainable energy
• Configuration: a ten-coach trainset with capacity for about 2,600 passengers, comprising two Hydrogen Driving Power Cars (DPCs) and eight Trailer Coaches; operational speed 75 kmph on the Jind-Sonipat section and design speed 110 kmph
• How it works — the causal chain: (1) Unlike conventional electric trains that draw power from overhead lines, the train generates electricity onboard (2) Hydrogen stored in onboard cylinders combines with oxygen from the air inside a Proton Exchange Membrane (PEM) fuel cell (3) The electrochemical reaction produces electricity that powers the traction motors and turns the wheels (4) The only direct by-products are water vapour and heat — no combustion, no smoke and no tailpipe carbon emissions, unlike diesel locomotives that burn fuel for mechanical power
• Onboard systems: each DPC houses fuel cells, lithium iron phosphate (LFP) batteries and hydrogen storage cylinders; the two power cars, one at each end, each produce 1,200 kW (1,600 hp), together enough to push the train to 110 kmph
• Fuel supply chain at Jind: (1) Hydrogen is produced on site by electrolysis, splitting water into hydrogen and oxygen using electricity at a green hydrogen plant, then stored in dedicated tanks (2) It is compressed to 500 bar so more can be stored in less volume (3) It is dispensed through two independent dispensers at a regulated 350 bar, refuelling both DPCs simultaneously and cutting turnaround time (4) The facility stores nearly 3,000 kg of hydrogen at a time; its storage and supply system is approved by the Petroleum and Explosives Safety Organisation (PESO)
• Institutional roles: the Research Designs and Standards Organisation (RDSO) framed the technical specifications and leads design approval; M/s Medha Servo Drives integrated the trainset; the Integral Coach Factory (ICF), Chennai contributed the theme and exterior design

🎯 UPSC Relevance: GS3 Environment — renewable energy, green hydrogen and decarbonisation of transport; GS3 Science & Technology (fuel cell technology, indigenisation) and Infrastructure (Railways).

📝 Prelims Facts:

• India's first hydrogen train (NaMo Green Rail) runs on the 89-km Jind-Sonipat section in Haryana; operational speed 75 kmph, design speed 110 kmph
• It uses a Proton Exchange Membrane (PEM) fuel cell with lithium iron phosphate (LFP) batteries; each of the two DPCs produces 1,200 kW (1,600 hp)
• Hydrogen is compressed to 500 bar for storage and dispensed at 350 bar; the Jind facility stores nearly 3,000 kg
• Approvals and roles: PESO (safety approval), RDSO (specifications), Medha Servo Drives (integration), ICF Chennai (design)
• The only by-products of the fuel cell reaction are water vapour and heat

🔑 Key Term: Green hydrogen — hydrogen produced by electrolysis of water using electricity from renewable sources, so that the fuel carries no carbon emissions at the point of production or use.