Never post your resume or sign up for LinkedIn in the course of a job search? Never use a dating site? Never buy a domain? Never pay property taxes? Never go to court? I see your point, but never revealing your info online isn’t realistic or even a choice for most people.

Okay, but this application only requires 1.9MWh on board. That would be about 57kg of hydrogen. The required capacity would actually be less since the hydrogen refuel time should be significantly less than recharging a battery. Anyway, I just doubt very much that 11,900kg storage vessels and fuel cell would be required. There’s simply less dead weight in a hydrogen vehicle as well as better performance and less externalities associated with battery production and disposal/recycling.

As for the efficiency of hydrogen production and delivery, it shouldn’t matter. We need to produce it anyway for emissions free steel and fertilizer production. The real problem is that we don’t have enough emissions free energy production, which isn’t one that battery vehicles or storage facilities solve. The current paradigm is one of deficit in order to create a market and I think battery storage unfortunately facilitates that. Instead, we need to build out capacity so that there’s almost always a surplus of electricity with the extra getting diverted to hydrogen production. It should be rare that the process is reversed to turn hydrogen back into electricity for the grid. That hydrogen is currently too expensive is the result of bad policy, which BEVs just reinforce.

I meant apart from the hydrogen fuel costs. It’s not obvious to me why the labor and maintenance costs of hydrogen powered mining vehicles wouldn’t be greater than that of the battery powered versions and the attendant charging/battery swapping equipment.

Why would the operating costs be higher?

Ah you’re right. Assuming an energy density of 160 Wh/kg that’s still almost 12,000kg. That much hydrogen contains about 400MWh.

A 240 tonne battery? That’s almost 240 tonnes less payload. They should make one that runs on hydrogen or ammonia.

Better than plastic explosives and shrapnel.

I wonder how they did it. Was the firmware hacked to make the batteries ignite or were separate explosives implanted in each pager?

We need hydrogen production because we need emissions free steel, fertilizer, and vehicle fuel. It’s also a good way to soak up excess electricity production. Sure, batteries can store energy arguably more efficiently, but they offer no practical benefits beyond that.

Free him

I think you are correct that it’s the car’s fault. I have an MPOW brand Bluetooth adapter that almost always works properly with my phone. I use it in my Mazda 3 that doesn’t have Bluetooth built in. My 2017 VW Golf (one year older than the MPOW adapter) does have Bluetooth and it frequently gives me trouble. However, I’m typically able to get the connection to work by disabling then reenabling Bluetooth on my smartphone. Resetting the VW head unit typically doesn’t help, which is the opposite of what I’d expect if the problem was with the car. The VW has Android Auto over USB, which I thought would be the end of my Bluetooth woes, but that has enough of its own problems that I just keep putting up with the Bluetooth.

How about a version that successfully connects to my car’s sound system right away, every time?

Okay, district heating with a heat pump makes more sense to me if there are processes that require cooling and can act as the source, like lowering the temperature of treated wastewater before adding it back to a waterway. However, the heat supply for the water treatment plant should still probably come from cogeneration. District cooling with a central heat pump system also makes sense, especially if it eliminates noisy condensers on the sides of buildings.

What about when you don’t have excess solar power? People need heat when they need heat, not just on sunny days. So, you’d need a massive battery for that, which has some undesirable implications. Instead, a thermal plant (be it solar, geothermal, or nuclear) can be designed to reliably satisfy heating and electricity demand with excess electricity going to hydrogen production for emissions-free steel, fertilizer, and vehicle fuel.

Nothing wrong with putting nuclear power plant next to where people live and work. They produce good steam for residential and industrial uses.

I guess this is cool, but even though it’s an efficient heat pump it’s still a poor use of electricity. It would make more sense to use cogeneration, to use the incidental heat from a thermal power plant, for district heating.

I prefer “Yankees”.

Thank you!

Mechanical engineer here self-hosting my own Lemmy and Pixelfed instances in a Yunohost VM on an old Ubuntu box. It just feels better being my own admin.

Legoland just doesn’t want to run afoul of the FAA. It’s allowed in Europe, but hydrogen is still prohibited as a lifting gas for aircraft in North America, even though pressurized hydrogen is permitted for fuel.