The boxes will just contain several compressed gas cylinders containing hydrogen, stacked together. These are used instead of a single large tank like you might expect due to the physics of storing compressed gas - you might think that you can use the same wall thickness and just increase the size of the vessel, but the size and wall thickness scale proportionally, so I guess it makes more sense to just use lots of small tanks which are already produced en masse instead of a more custom large single tank. Presumably much easier to maintain if a tank develops a defect, existing economies of scale, etc.
I actually recently did this math (for something unrelated) and can confirm that is true. I can also confirm that the weight of Tank+hydrogen to gasoline ratio doesn't change with tank size, which is interesting.
You can probably make the drive from San Jose to Fresno and back. But there is a station in Coalinga so I would use that if I needed to drive to Fresno.
5:41 but also, what are your driving habits? because that's a really important factor. Fuel usage varies based on speed. Which is why the EPA has a set 55% highway and 45% city ratio on their ratings test (I think, that's off the top of my head, so it might be wrong) and your test could be greatly effected by that. come to think of it that would be an interesting test, and useful consumer information. As I'm sure you know, there is a great difference between how different kinds of powertrains do in different environments. -Pure ICE: great on highways, terrible in stop and go. -Hybrids: decent at both. -BEVs: Great in the city, really takes a range hit on the highway. I don't know which scenario FCEVs would fit. I would guess the BEV model, but I don't know for sure. Especially because I recently read a paper suggesting that a warmed up fuel cell stack would become more efficient as opposed to a cold one (around 10% in their conditions) which would imply that an FCEV might be somewhere between the hybrid and the BEV. (according to C&D BEVs should expect a 17% loss a pure highway speeds, as opposed to EPA numbers) so maybe do three fuel economy runs to see how the car does in each. 100 miles mostly city, 100 miles mostly highway, and 100 miles of mixed in order to see what kind of efficiency the Mirai gets under each condition.
Always wondered why you go to the station when it’s low and film it? Are you trying to get Toyota to buy it back? Because ToYOTa DoESnT OwN ThE sTaTiOnS
The boxes will just contain several compressed gas cylinders containing hydrogen, stacked together. These are used instead of a single large tank like you might expect due to the physics of storing compressed gas - you might think that you can use the same wall thickness and just increase the size of the vessel, but the size and wall thickness scale proportionally, so I guess it makes more sense to just use lots of small tanks which are already produced en masse instead of a more custom large single tank. Presumably much easier to maintain if a tank develops a defect, existing economies of scale, etc.
I actually recently did this math (for something unrelated) and can confirm that is true. I can also confirm that the weight of Tank+hydrogen to gasoline ratio doesn't change with tank size, which is interesting.
Hydrogen companies customers and producers are still waiting on the hydrogen tax credits.
Thoughts on the Mirai used market?
I will drive from San Jose to Fresno (145 miles) . Do you know I need to refuel before go back to San Jose? Any fuel stations close to Fresno?. Thanks
You can probably make the drive from San Jose to Fresno and back. But there is a station in Coalinga so I would use that if I needed to drive to Fresno.
Interesting point re those trucks, it takes 18x as many compared to petrol/ diesel tankers.
5:41 but also, what are your driving habits? because that's a really important factor. Fuel usage varies based on speed.
Which is why the EPA has a set 55% highway and 45% city ratio on their ratings test (I think, that's off the top of my head, so it might be wrong) and your test could be greatly effected by that.
come to think of it that would be an interesting test, and useful consumer information. As I'm sure you know, there is a great difference between how different kinds of powertrains do in different environments.
-Pure ICE: great on highways, terrible in stop and go.
-Hybrids: decent at both.
-BEVs: Great in the city, really takes a range hit on the highway.
I don't know which scenario FCEVs would fit. I would guess the BEV model, but I don't know for sure. Especially because I recently read a paper suggesting that a warmed up fuel cell stack would become more efficient as opposed to a cold one (around 10% in their conditions) which would imply that an FCEV might be somewhere between the hybrid and the BEV. (according to C&D BEVs should expect a 17% loss a pure highway speeds, as opposed to EPA numbers)
so maybe do three fuel economy runs to see how the car does in each. 100 miles mostly city, 100 miles mostly highway, and 100 miles of mixed in order to see what kind of efficiency the Mirai gets under each condition.
Do you use the AC on Eco-Low or High??
Eco AC/heat is the only way to go with normal driving.
Always wondered why you go to the station when it’s low and film it? Are you trying to get Toyota to buy it back? Because ToYOTa DoESnT OwN ThE sTaTiOnS