tag:blogger.com,1999:blog-2761684730989137546.post8060759467324488184..comments2024-03-18T19:09:18.510-04:00Comments on Mike Norman Economics: The Two Major Obstacles To A Hydrogen Revolution — Alan Mammosermike normanhttp://www.blogger.com/profile/03296006882513340747noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-2761684730989137546.post-50570961842973972302021-05-31T09:29:38.629-04:002021-05-31T09:29:38.629-04:00In the beginning was the Word, and the Word was wi...<i>In the beginning was the Word, and the Word was with God, and the Word was God.</i> <b>--John 1:1</b><br /><br /><i>In the beginning was Hydrogen, and Hydrogen was with God, and Hydrogen was God</i> <b>-- lastgreek</b><br />lastgreekhttps://www.blogger.com/profile/00354740659933239445noreply@blogger.comtag:blogger.com,1999:blog-2761684730989137546.post-80685165392860238142021-05-30T23:03:03.315-04:002021-05-30T23:03:03.315-04:00https://www.energy.gov/ne/articles/3-advanced-reac...https://www.energy.gov/ne/articles/3-advanced-reactor-systems-watch-2030Matt Frankohttps://www.blogger.com/profile/11978352335097260145noreply@blogger.comtag:blogger.com,1999:blog-2761684730989137546.post-30947557502397691612021-05-30T22:02:57.760-04:002021-05-30T22:02:57.760-04:00Fossil fuels aren't going away anytime soon; r...Fossil fuels aren't going away anytime soon; renewables are coming online; and hydrogen is nowhere.Peter Panhttps://www.blogger.com/profile/09473311771939167712noreply@blogger.comtag:blogger.com,1999:blog-2761684730989137546.post-44788765890576048832021-05-30T20:13:58.649-04:002021-05-30T20:13:58.649-04:00Hydrogen’s efficiency problem
The reason why hydr...<i><b>Hydrogen’s efficiency problem</b><br /><br />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.<br /><br />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.<br /><br />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.<br /><br />With electric vehicles, the energy runs on wires all the way from the source to the car. The same 100 watts of power from the same turbine loses about 5% of efficiency in this journey through the grid (in the case of hydrogen, I’m assuming the conversion takes place onsite at the wind farm).<br /><br />You lose a further 10% of energy from charging and discharging the lithium-ion battery, plus another 5% from using the electricity to make the vehicle move. So you are down to 80 watts – as shown in the figure opposite.<br /><br />In other words, the hydrogen fuel cell requires double the amount of energy. To quote BMW: “The overall efficiency in the power-to-vehicle-drive energy chain is therefore only half the level of [an electric vehicle].”</i><br /><br />The source below shows the comparison in a visual form:<br /><br />source: <a href="https://theconversation.com/hydrogen-cars-wont-overtake-electric-vehicles-because-theyre-hampered-by-the-laws-of-science-139899" rel="nofollow">Hydrogen cars won’t overtake electric vehicles because they’re hampered by the laws of science</a><br /><br />This YouTube video covers the same idea:<br /><br /><a href="https://www.youtube.com/watch?v=f7MzFfuNOtY" rel="nofollow">The Truth about Hydrogen</a>Ahmed Fareshttps://www.blogger.com/profile/07105255828394485657noreply@blogger.com