Grønne aksjer

omans
17.01.2021 kl 09:50 1653

Hydrogen’s efficiency problem
The reason why hydrogen is inefficient is because the energy must move from wire to gas to wire in order to power a car. This is sometimes called the energy vector transition.

Let’s take 100 watts of electricity produced by a renewable source such as a wind turbine. To power an FCEV, that energy has to be converted into hydrogen, possibly by passing it through water (the electrolysis process). This is around 75% energy-efficient, so around one-quarter of the electricity is automatically lost.

The hydrogen produced has to be compressed, chilled and transported to the hydrogen station, a process that is around 90% efficient. Once inside the vehicle, the hydrogen needs converted into electricity, which is 60% efficient. Finally the electricity used in the motor to move the vehicle is is around 95% efficient. Put together, only 38% of the original electricity – 38 watts out of 100 – are used.

https://theconversation.com/hydrogen-cars-wont-overtake-electric-vehicles-because-theyre-hampered-by-the-laws-of-science-139899
Redigert 21.01.2021 kl 08:23

Rapportér innlegg

Vennligst skriv inn kommentar på hva du mener er upassende og trykk send. Dersom kommentar ikke er nødvendig, vennligst trykk send direkte.
E-postadressen brukes kun for å få kontakt med deg i forbindelse med advarselen.
E-postadressen brukes kun for å få kontakt med deg i forbindelse med advarselen.