PM to flag off India's first hydrogen train: How they work, and why they haven't picked pace globally
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500+ questions on Science & Tech with explanations
📌 Summary:
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PM Modi will flag off India''s first hydrogen-powered train at Jind, Haryana on July 17 — among the world''s longest (8 passenger cars + 2 driving power cars) and most powerful (2,400 kW / 3,200 hp) hydrogen trainsets
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Operations: ~682 passengers on the 89-km Jind–Sonipat section at up to 75 km/h; two round trips a day (356 km) consuming ~300 kg of hydrogen; created by replacing diesel engines on old DEMU rakes with a zero-emission hydrogen-electric propulsion system
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How it works: hydrogen fuel cells combine onboard hydrogen (440 kg stored at high pressure) with atmospheric oxygen to generate tractive electricity — no overhead wires needed; each power car has 4 integrated power packs (fuel cell 115 kW + lithium ferro phosphate battery 185 kW = 300 kW each)
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Load management: fuel cell gives constant output; surplus charges the battery at low demand, battery supplements at high speed; battery is ~80% charged at circuit end
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Key challenges globally: hydrogen must be stored at 200–500 bar (vs 1 bar atmospheric), production levels are low and transport is difficult — why few countries run hydrogen trains, mostly short-haul
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Global context: Alstom''s Coradia iLint (Germany, 2018) was the world''s first hydrogen passenger train; Japan, China and the US followed; India''s fuel cell is imported from Canada''s Ballard
🎯 UPSC Relevance: GS3 S&T/Environment — green hydrogen applications in transport, decarbonising railways (ties to National Green Hydrogen Mission and net-zero 2070)
📝 Prelims Facts:
- India''s first hydrogen train: Jind–Sonipat (89 km), Haryana; flag-off July 17
- Power: 2,400 kW; fuel cell + lithium ferro phosphate battery hybrid; 440 kg onboard H2
- World''s first hydrogen passenger train: Alstom Coradia iLint, Germany (2018)
🔑 Key Term: Hydrogen fuel cell — electrochemical device combining H2 and O2 to produce electricity with water as the only emission; the reverse of electrolysis
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