Scientists were longing for the day when hydrogen will be fuel for vehicles. They were visualizing future cars running on pressurized hydrogen from a fuel station, thereby permitting zero greenhouse emissions.
The Canadian Hydrogen and Fuel Cell Association heap praises on the hydrogen vehicles reporting that empirically the waste from these cars will be 20 times weightless than for EVs. Though it is agreeable that hydrogen vehicles will combat and knock out carbon emissions, it is still debatable whether hydrogen vehicles are competing to replace EVs. Volkswagen admits in a statement comparing the two technologies saying it is commendatory to use EV for energy efficiency in passenger cars.
The inefficiency of hydrogen cars is that energy takes a vector from wire to gas to wire before acceleration. To further the argument, to power a hydrogen vehicle by electricity from a renewable source requires the electrolysis of water to get hydrogen. This process results in a loss of almost a quarter of the power. Furthermore, the hydrogen must go through compression and other procedures before deployment to the hydrogen station, a process in which another 10% of the energy dissipates. In the car, there is the vector energy transition resulting in about 30% energy loss. Therefore, the whole quagmire is a loss compared to EV technology.
On the other hand, for electric vehicles, there’s only one connection through wires. For this technology, the efficiency is about 95% since power intake is from the power grid. The charging and discharge of the battery and acceleration of the vehicle result in 15% of energy loss, and therefore you have more power to run on than for hydrogen cars.
With this comparison, the sales figures justify why EVs are more efficient than hydrogen cars. There are over four million EVs compared to the 7500 hydrogen cars at the end of 2019, which is the same timeframe for the two since their inauguration. Additionally, hydrogen has fewer fuelling stations compared to EVs. The increase of hydrogen stations will be tough with the COVID-19 pandemic, whereas EVs have a short fuelling time and are on an upward track. One example testifying to this is China’s NIO car manufacturers. The company reports that its cars take a short swap to charge.
The comparison of Hydrogen vehicles with EVs in terms of emissions, as said earlier, is all because the EV in question was a model that utilizes electricity from fossil fuels.
Finally, electric vehicles are better in many ways compared to hydrogen cars. For instance, hydrogen cars take more time refueling, whereas EVs take the shortest period. It is unfathomable to say that hydrogen cars will surpass Evs in the coming future.