AUTO AD IDROGENO: Rivoluzione o fallimento?

6 Nov 2023 · 14 min
13:38

YouTube video by Jacopo D'Alesio (Jakidale) demonstrating and discussing a BMW iX5 hydrogen prototype. The presenter explains how fuel-cell vehicles work (fuel cell converts H2+O2 → electricity + water vapor), notes the car uses an electric motor (295 kW) and a small buffer battery (~5 kW), and shows two hydrogen tanks under the vehicle. He compares overall energy efficiency: from 1000 kWh solar input a battery EV uses ~680 kWh (≈68%) while a hydrogen pathway yields only ~300 kWh (≈30%) due to conversion, storage and transport losses. He demonstrates refuelling at an Enel/IVE station (hydrogen at 700 bar, cooled to −40°C to increase density), describes station equipment (compressor up to ~900 bar, truck delivery ~300 kg per trailer), and notes Italy currently has only two public H2 stations (Mestre and Bolzano). The presenter concludes H2 is currently less efficient but may be useful for grids with variable renewables, heavy transport, extreme environments, and as a complementary solution to battery EVs.

Questions this video answers

295 kilowatt

About 5 kilowatt (small buffer battery)

Battery EV: ~680 kWh (≈68%); Hydrogen pathway: ~300 kWh (≈30%)

Two stations: Mestre and Bolzano

Dispensing pressure: 700 bar for passenger vehicles (station compression up to ~900 bar); vehicle tank example capacity mentioned ≈6 kg of H2 (cooling to −40°C during refuelling to increase density)

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