alt Hacker News> It also fails to note that most of the energy ends up us waste heat.
I've heard the statistic that 40% of the total oil pumped out of the ground just to transporting oil. We use almost half just to move it to and fro before even using it.
Is this accurate?
Replies
This can't be accurate.
Let's say a barrel of oil travels 15,000 km from Saudi Arabia to Texas, gets refined, gets shipped another 10,000 km to Europe, then the last 1,000 km overland by truck.
This reasonably well sourced Reddit post [0] says big oil tankers burn 0.1% of their fuel per 1,000 km, smaller ones a bit more. Say 0.2% on aggregate, that's 5% for the whole journey, 10% because the ship is empty half the time.
From the same source, a truck burns about 3% per 1,000 km. This seems too high: for a 40,000 kg loaded truck that's less than 1 kmpl or 2.5 mpg. But let's believe it, double it for empty journeys, and we still only get 16%.
I used very conservative estimates here: surely most oil doesn't travel anywhere near that far.
Alternative thought experiment: look at the traffic on the highway. If this were true, even neglecting oil burnt for heating or electricity or aviation, you'd expect 40% of the vehicles to be tanker trucks.
[0] https://www.reddit.com/r/explainlikeimfive/comments/2jozd7/e...
I suspect this is confusion between the statistic that 40% of global shipping traffic is transportation of fossil fuels.
https://qz.com/2113243/forty-percent-of-all-shipping-cargo-c...
I also don’t have a source, but I have heard that 15% of global energy is dedicated to handling petroleum (extracting, transporting, refining) which feels like a plausible number.
This doesn't math out to me just based on what I know of energy consumption numbers.
Sounds really dubious to me. Tankers and pipelines are really efficient.
I would not believe it at all without source.
Maybe someone got confused by "transportation" altogether being major consumer?
It must be way higher if you really got into it
i.e. A friend that works on rigs is flown to and from rigs from anywhere on earth every month, then choppers out to the rig and back. Same for everyone that works on the rigs.
Say a tanker truck has a roughly 300 gallon fuel tank and a 10,000 gallon payload tank (per google). Thats roughly 3% loss to cross a lot of the US, which is by no means insignificant but assuming ships are not any worse and the pipeline to the ship is minimal, around a manageable 6% loss.