How an oil refinery works
construction-physics.com433 points by chmaynard 21 hours ago
433 points by chmaynard 21 hours ago
About thirty years ago, I was given a personal tour of an oil refinery in Yokohama, Japan. I was doing freelance translation then for a Japanese oil company. I mentioned to one of my contacts there that I would be interested in actually seeing the sort of equipment I was translating documents about, and they arranged a visit for me.
Two things stand out in my memory:
Even though the refinery was in full operation, we saw no other people as we walked and drove around the facility. The only staff we saw were in the control room, and they didn’t seem very busy.
The other was the almost complete lack of odors. That particular refinery is close to an upscale residential area, and the company had to be careful to keep sulfurous and other gases from escaping in order to avoid complaints and possibly fines. Some of the documentation I was translating then was about their system for detecting and preventing odor releases. As I recall, they had people walk around the perimeter and local neighborhoods regularly, just sniffing for smells from the plant. On the day we were there, I noticed petroleum odors only when we were close to one of the refining towers; otherwise, the only smell was from the nearby Tokyo Bay.
Wow. I grew up in Houston, and I assumed that the smell from these plants was pretty-much unavoidable. It's shocking (and I guess not all that surprising) that this is a choice that manufacturers make.
I guess it really does depend on the economic power of the surrounding communities.
Likewise, a lot of the complaints people have about data centers are engineering choices. If companies can get away with it, they'll do it the cheap way.
Where I live there's been a long running saga around flaring: https://www.bbc.co.uk/news/topics/c6wk2ml6gwzt
When it's lit at night you can see it from up to twenty miles away. Closer in you can hear it. Things have gone back and forwards on mitigations, fines, industrial disputes, and in the end the plant is closing.
Sounds about right. I work in the field contracting to a lot of plants and once they are built they don’t need a ton of people there. It’s really if they are doing shutdowns that there are a lot of people.
My father actually works at the Jamnagar refinery. I was bought up in there seeing and visiting the refinery as families are allowed for some trips every now and then. I learnt a lot of this process of refining out of curiosity of what my father did and it was just so cool. The refinery in context is the world's largest since more than a decade and seeing it with your own eyes, it feels like a wonder of the world for real. Truly marvellous outcome of perseverance and engineering. Loved to see this blog on the HN homepage, its very well written
It’s worth mentioning here - the founder (Dhiru bhai) of Reliance used to pump gas in Dubai and that’s where he got the dream to start his own refinery one day. Dream one side, but just going about setting up such a giant production facility at an enormous scale is nothing short of an extraordinary achievement. Pretty sure he had overflow of grit, commitment, and all around strength, and of course high dose of highest level of talent.
Any source for this claim that Ambani started his career as a gas pumper? Or are do you mean someone else?
Nah, he did it the old-fashioned way - by corruption and dirty dealing, then his family suppressed the people reporting the truth:
My father worked in the HPCL refinery in Chembur. I got to go visit on Republic day when I was a kid, but they stopped doing visits. He worked in the distillation tower at first, but then moved into diesel desulphurization. I wish it wasn't but its a dangerous job, and he narrowly escaped several accidents, including a horrible naphta fire that took many lives.
Wow, I contracted in Jamnagar for Reliance building software back in 1999-2000. It was fun building a web interface to report on their IoT (not called IoT back then) devices - sensors, meters and whatnots through a CORBA/C++ interface. That was very advanced for those days.
Would love to hear stories about it. Reliance is working on replicating the Jamnagar refinery approach in America [0] now as well.
It's interesting to both see Asian majors and EPCs increasingly dominating the petrochemical chain as well as see an industry that the US used to lead in increasingly become dependent those partners.
What a massive shift in just 25 years.
[0] - https://www.bloomberg.com/news/articles/2026-03-11/reliance-...
Not really a big deal. The numbers are cumulative. The Reliance Brownsville Texas facility will only process 60 million barrels per year. That's 1% of annual US refining capacity.
> It's interesting to both see Asian majors and EPCs increasingly dominating the petrochemical chain
You really don't want downstream in your backyard, though. The environmental oversight in these countries is...less. Meanwhile, it's a hyper competitive industry with low margins so adding new capacity only works in places with cheap labor and less red tape.
Tech bros who don't know the industries they talk about should honestly STFU. It's the one annoying thing about HN. Y'all feel you need to talk but aren't actually contributing anything of value to the conversation.
Rebuilding refinery capacity within the US is hard, especially given that a net new refinery hasn't been built in the US in 50 years.
Honestly if YC agrees to delete my comments I'd be glad to leave this forum. Host HNers just aren't worth dealing with at this point.
Instantly I'm reminded of "That Time I Tried to Buy an Actual Barrel of Crude Oil"
https://news.ycombinator.com/item?id=43761572
Which leads to "Planet Money Buys Oil"
https://www.npr.org/sections/money/2016/08/26/491342091/plan...
Here's how a refinery works: https://www.myabandonware.com/game/simrefinery-e65 (built for Chevron, in fact)
And the manual: https://archive.org/details/sim-refinery-tour-book_202006/mo...
Reminds me of the shareware nuclear power plant sims built for a similar purpose I used to play.
The article is quick to point out the huge role of oil in the modern energy mix. It also fails to note that most of the energy ends up us waste heat. The so called "Primary energy fallacy". Other than that, it's a great read.
To me (as someone who has worked on oil rigs, oil pipelines, oil refineries, and chemical plants), crude oil seems far more valuable as a material than as an energy source. It feels like a damned shame that we're still combusting so much of it for heat rather than reserving it for physical materials.
I understand the ways that economics are very important, and that the economics still currently favor burning a large fraction of the crude oil. But I also know that the right kinds of investments and a bit of luck can often change those economics, and that would be nice to see.
We can always make polymers and HydroCarbons in general from other sources if we have energy abundance. We literally can just capture the CO2 we emitted from burning fossil and make it plastics.
Of course this does not make sense in a world where we do not have enough energy to even keep datacenters open.
Edit: To clarify, I do not propose burning fossils to capture CO2 and make plastics. I am a Thermo Laws believer.
Methane >> carbon dioxide as a polyethylene/linear polymers feed stock. Double bonded oxygens are hella higher affinity than four loose hydrogens. Also as pointed out, even in a concentrated combustion effluent stack CO2 is low concentration at atmospheric pressure.
I don’t know about methane as an aromatic/hybridized ring building block. Anything is possible with chemical synthesis but is it energy feasible.
There’s always plant hydrocarbon feed stocks but I think using arable land to make plastics is dumb and also carbon intensive. (I do wear cotton clothing tho because you need to make trade offs).
Siemens has a collaboration with Porsche are piloting already eFuel production. Cost is super high (think like $10/liter). But thermodynamically feasible.
https://www.siemens-energy.com/global/en/home/press-releases...
That sounds like a hack from late-game Factorio: pollute enough that you can just pull iron filings right out of the air. Everyone wins! Except the meatbags who need to breathe the air …
Assuming the damn rain does not throw your iron down to the ground before it reaches its destination. But then again you have rivers as a plan B.
The problem with carbon capture from air is the low carbon concentration. Try to do the math for how much air you need to process to get even one barrel of oil worth of hydrocarbons from a DAC process.
The answer to this problem as it's currently being pursued is renewable carbon feedstocks. Growing things like canola on marginal land, harvesting it and turning it into biofuels and LCLFs (low carbon liquid fuels) using renewable solar/wind energy.
It's not a solved problem, though. Truly renewable carbon feedstocks have to source their carbon from the air, not the soil, which has to be continually measured. Land selection for carbon feedstock projects has to ensure it doesn't induce land-use change in other locations due to displacing other things like food production, etc. Otherwise the emissions and environmental harm from those downstream effects have to be included in the carbon positive/negative calculations for the project.
There is way more carbon in the ground as rocks than as oil. If you have plenty of energy, the difference is quite manageable.
Besides, as somebody already pointed out, there is that CO2 on the air that we actually want to get rid of. It's nothing compared to the rocks, and a little harder to get, but getting it first would improve things a lot.
The carbon isn’t valuable elementally as much as it is structurally and molecularly. I mean that as aromatic rings and other ready made building blocks that conveniently can be fractionally separated with pressure and temperature conditions in a column as a gross generalization. All of this is energy intensive but much less so than building up from three atom molecules with strong bonds. And much much less energy intensive than separating a trace % molecule from the atmosphere at low atmospheric pressure and translating that to complex molecules.
There needs to be more appreciation for the laws of thermodynamics when discussing technology. Everything is not a 1-dimensional reduced abstraction.
The #1 rule of HN that must never be violated: software developers are the smartest people on earth, and literally every field could benefit from their definitely not stunningly overconfident and reductionist contributions. I dread threads about engineering subjects I get paid to be competent in because I can't handle the tsunami of neckbeard opinions that I'm about to see.
> there is that CO2 on the air that we actually want to get rid of
For this reason I have long been slightly baffled that development of compostable/biodegradable bio-based plastics is such a priority in materials research. Sure, it's interesting in the very long run, but for the foreseeable future, converting atmospheric CO2 (via plants as an initial step) into a long lived, inert material that can just be buried after an initial use seems like a benefit.
> 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?
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...
> you'd expect 40% of the vehicles to be tanker trucks.
I’d expect tanker trucks to carry far more fuel than the typical vehicle.
> Say 0.2% on aggregate, that's 5% for the whole journey, 10% because the ship is empty half the time.
Fuel saves from slow steaming and being empty are massive.
> 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.
The US has a lot of domestic pipelines [1], and a lot of the remainder is done by train [2] because trains are the most efficient way to transport bulk goods over extremely long distances.
[1] https://www.bts.gov/geography/geospatial-portal/us-petroleum...
[2] https://www.aar.org/wp-content/uploads/2018/07/AAR-US-Rail-C...
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...
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.
Trucks need a lot more infrastructure in a lot more places than ships, though. I guess that's not often factored in.
I very much doubt that number. Maybe it was referring to 40% of the price of oil for consumers comes from the stages after pumping?
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.
The helicopter fuel is a drop in the oil ocean. You can just check this but checking how much oil that rig produces per month. How many flights the helicopter does every month and the amount of oil needed for it. It’s gonna be a drop in the bucket. Otherwise it would not be profitable to drill for oil.
And? Given how much typical oil rig produces this would not be a serious part of its production.
As someone with no real-world petrochemistry experience, but much gaming experience, I was very surprised how familiar the crude oil processing diagram looks. Factorio and GregTech are two prime examples of fairly realistic oil processing lines (probably as accurate as any game would reasonably try to be).
I was thinking the same thing! Having played through Factorio and a fair amount of GregTech really reframed my viewpoint on energy production that a huge part of the benefit of fossil fuels is the byproducts, not just raw energy output.
All the more reason to save fossil fuels instead of burning them for energy.
There is a cool game that someone posted a while ago about this https://hnarcade.com/games/games/refinery-simulator
I find it amazing how "naphtha" can mean crude oil, diesel, kerosene, gasoline or kind of white spirit.
EDIT: oh and it comes from Akkadian! how many Akkadian words do you know?
NO₂ column density over the Jamnagar refinery mentioned in the article: https://no2.libmap.org/?month=0&lat=22.2223&lng=69.7911&z=8....
If you're interested in how the oil industry as a whole operates and why, Oil 101 is an interesting read.
I remember driving by a refinery years ago and it had two or three towers with big flames that were just burning off waste gas. This seemed wasteful to me. If it can burn, then it seems like it could be used for something productive.
Do they still just burn off that gas?
Usually, when refineries flare something like that it's because what they are burning is not suitable for use, and making it suitable would cost more than the product would sell for.
Often methane as a by-product of oil production is flared, because the amount is small enough that it's not worth setting up processing plants and supply chains for. Other times, the fluid is heavily contaminated by e.g. sulfur compounds, and would be costly to purify. Still other times the production of the fluid is unreliable or intermittent, and cannot sustain a continuous production process.
Although, flare gas recovery systems exist nowadays to make use of these waste gases, commonly for local power production for the refinery itself.
That's why plastic bags are so cheap -- ethanol is a byproduct, but you earn more if you discard it and sell only oil.
But the burned up ethanol would be perfectly suitable for products.
Nowadays there are some regulations to prevent that, so they may sell up ethanol at negative prices sometimes.
UPDATE: Ethene, not ethanol.
You wrote ethanol (C₂H₆O), but do you mean ethylene/ethene (C₂H₄)? Polyethylene (PE) is a very common plastic, such as HDPE, LDPE, PET.
You're right, sorry, I thought of ethene.
Like here is a good review https://youtu.be/325HdQe4WM4
Yea while $ viability is true, it's better to think of as
1) using some potentially useful products as fuel to burning off things you don't want and
2) the buffer to keep non-steady inflows in a suitable ready condition for steady-state processing. (When real world steady-state is less than ideal.)
Number 2 is really what dominates the equation, as shutting in gas sources or even just turning off pipelines is incredibly more complicated than just an 'off' switch.
And turning back on is even more complicated. In the case of wells, once you shut in, turning back on may never result in the same level of production as before.
It's usually a small amount of waste, and handling gas is very different from distillate.
You'd need to either liquify that gas or collect it to a pipeline in order to make it useful. I remember reading that modern refineries make use of the gases instead of flaring them though I'm not sure how.
They flare to quickly burn off excess gases as a safety mechanism rather than anything else. Venting gas into the air would be much worse.
Can't that burning be converted into energy like boiling water to turn a turbine to generate energy? Or not worth the payoff?
the way it was explained to me is if you see the flares then something is wrong. It may not be catastrophic or anything serious but something isn't going according to plan. Because you're right, why burn it off when you can sell it?
It generally means something is out of balance, which doesn't necessarily mean something is wrong. Usually not.
But if something is wrong, yea you can bet they will be burning off with big flares.
The article does a good job of showing how a typical barrel of oil is converted into a dozen or more distinct usable products.
It would be helpful to also have a chart that shows how much gasoline or diesel as a percentage of each barrel is produced. It would be a bit variable, since not all crude oil is the same, but I think it would be close for most of it.
Some people think when diesel and regular gas prices diverge, that they should just be able to produce one at the expense of the other; but the distillation process shows that they are fundamentally different.
You can to vary the split of the output by cracking heavier hydrocarbons into lighter. So it's not a fixed fraction, but driven by both demand and cost of processing.
Some crude averages from https://www.eia.gov/energyexplained/oil-and-petroleum-produc...
~50% gasoline, ~25-30% diesel.
Crikey we have got so far to go with energy production.
Thankfully, the top consumer China, is building nuclear reactors at an unfathomable rate.
This is a really good overview of oil refining. I'll add a few things.
1. The light and heavy distinction is covered by a measure called API gravity [1]. The higher the API gravity, the lighter the crude;
2. Refiners mix different crude types depending on what kind of refined products they want to produce;
3. Heavy crude tends to be less valuable although it's essential for some applications. Lighter crude produces generally more valuable products like gasoline, diesel and avgas. But heavy crude goes into construction (eg roads) and fuel for ships (ie bunkers));
4. Most refineries in the US are very old and are very polluting. They don't need to be this way. A new refiner would produce vastly less pollution but they're almost impossible to get permission to build now. One exception is the Southern Rock refinery currently being built in Oklahoma [2], which will be powered by largely renewable energy and produce a lot less emissions than an equivalent older refinery with the same capacity;
5. There are different blends of gasoline that the US produces. The biggest is so-called summer and winter blends. What's the differene? Additives are added to summer blends (in particular) to increase the boiling point so less of the gasoline is in gas form because that produces more smog;
6. California uses their own blends so in 2021-2022 when CA gas went to $8+, it wasn't just "gouging". It doesn't really work that way. CA requires a particular blend that only CA refineries produce so it's simple supply and demand as no new capacity gets added to CA refineries and demand goes up with population growth.
The reason for the CA blend goes back to the 80s and 90s when smog was a much bigger problem. Better vehicle emissions standards since then as well as improvements in the blends the rest of the country uses have largely made the CA blend obsolete so CA is really paying $1+/gallon more for literally no reason; and
7. California doesn't build pipelines so is entirely dependent on seaborne oil imports (~75%) despite the US being a net energy exporter. Last I checked, ~20% of that foreign oil comes through the Strait (from Iraq, mostly) so, interestingly, CA is more vulnerable to the Strait of Hormuz closure than the rest of the country.
I guess I'll add a disclaimer: I'm very much pro-renewables, particular solar. I think solar is the future. But we currently live in a world that has huge demand for oil and no alternatives for many of those uses (eg diesel, plastics, construction, industrial, avgas) so we should at least be smart about how we go forward.
[1]: https://en.wikipedia.org/wiki/API_gravity
[2]: https://www.oklahoman.com/story/news/2023/05/24/5-6-billion-...
"The reason for the CA blend goes back to the 80s and 90s when smog was a much bigger problem. Better vehicle emissions standards since then as well as improvements in the blends the rest of the country uses have largely made the CA blend obsolete so CA is really paying $1+/gallon more for literally no reason"
California cities still struggle with smog. The valley geography capped by inversion layers are unique factors to LA, central valley cities, and some parts of the bay that really do necessitate unique solutions if we don't want to choke. There's sources that back this claim you're welcome to Google. Lastly, based on the overall tenor of your points, I'd invite you to question whether someone with an agenda is driving the incorrect facts you receive in your media diet.
A few corrections. Credentials: I am a Chemical Engineer in a Senior Tecnical Leadership position at a refinery with over thirty years of experience.
1) API gravity is the density of the crude oil. Higher API = lower density. We use this unit of measure because it magnifies the differences in densities vs. using conventional units of measure.
2) Refiners in the US mix different crude types to maximize the objective function ($) of a set of constraints including crude grade pricing and availability, product demand volume and pricing, refinery unit constraints and product quality specifications. This is done using a linear program model.
3) light and heavy crude contain the same molecules but in different ratios. For example they all contain gasoline, jet fuel, diesel boiling range material and all contain some amount of material that could be turned into ship fuel or asphalt for paving roads. Heavy crude tends to sell at a discount to light crude because of the laws of supply and demand - refiners will buy a mix of whatever makes them the most money.
4) “Most refineries in the US are very old and are very polluting”While US refineries sites are old - some site have been in operation for over 100 year, the units and configuration of the refineries has evolved continuously over the years. The technology used in the refining units has evolved as well - this is not a static industry. The pollution standard for refinery operations and fuel emissions have been raised multiple times. So “Very Polluting” vs. new refineries does not pass muster. US refineries have been retrofitting wet gas scrubbers and selective catalytic reduction units to reduce emissions of SOx and NOx for decades. These technologies reduce emissions of both pollutants by over 90%. Most of the emissions come from burning the fuel that refineries produce and both legacy US refineries and new ones have to meet the same fuel quality specifications and hence produce equivalent emissions.
5. “There are different blends of gasoline that the US produces. The biggest is so-called summer and winter blends. What's the differene? Additives are added to summer blends (in particular) to increase the boiling point so less of the gasoline is in gas form because that produces more smog;”
Summer gasoline contains less butane than winter gasoline. That is the main difference. Butane is added to winter gasoline so cars start in cold weather. There are no additives added to raise the boiling point in summer - just less volatile light material added.
As an aside, Mvodern gasoline vehicles have carbon canisters to capture vapors (such as butane) from the gas tank when not in service. These are then regenerated by sweeping air through them when the vehicles are running.
6. “ California uses their own blends so in 2021-2022 when CA gas went to $8+, it wasn't just "gouging". It doesn't really work that way. CA requires a particular blend that only CA refineries produce so it's simple supply and demand as no new capacity gets added to CA refineries and demand goes up with population growth. The reason for the CA blend goes back to the 80s and 90s when smog was a much bigger problem. Better vehicle emissions standards since then as well as improvements in the blends the rest of the country uses have largely made the CA blend obsolete so CA is really paying $1+/gallon more for literally no reason;”
There is some out of date information here. California is a net importer of gasoline since refinery closures in California have outpaced reduced demand from increased fleet fuel efficiency / BEV adoption. There are refineries in Asia that export California and some other US refineries can also make California grade gasoline but this requires shipping via the Panama Canal on Jones act ships that are scarce and expensive.
P66 / Kinder Morgan are planning a pipeline / pipeline reversal that would bring refined product into California including California gasoline.
[off topic] Given your background,I was wondering if you could offer some clarification if I'd read some Bs or just misunderstood. Long ago I had read something in a petrochemical book, maybe I got wrong, but one little section I skimmed over seemed to point out a modern refinery cracking plant could use vegetable input stock with I think was a caveat in regard to cleaning or addition by-products. Is this feasible or done, or was I reading a fluffy passage that wasn't fact checked properly?
Yes, Hydroprocessing units at refineries can either co-process vegetable oil with hydrocarbons or run 100% on vegetable oil after some modifications.
Vegetable oils are tri-glycerides. These molecules can be cracked into three long chain paraffins and a propane molecule by reacting them with hydrogen at high temperature and pressure over a catalyst. This makes a raw diesel fuel that then needs to be isomerized to lower the cloud point (basically when it begins to freeze). The end result is a drop in replacement for fossil diesel fuel that burns smoother and cleaner.
Two refineries in the SF Bay Area have converted from fossil fuel operation to manufacturing this renewable diesel.
Fun fact: over 70% of diesel sold in California is now renewable or bio diesel. Both types start with tri glycerides - either vegetable oil, waste cooking oil or animal fats.
Started my career working in AI for a company that had a couple large refineries (I didnt dare refer to what we were doing as statistics because those guys had all been fired a decade before after attempting to perform some back magic they called six sigma), pipelines, a fleet of ethanol plants (at the time) and a couple biodiesel bets, including one that attempted to convert corn oil into biodiesel.
I was blessed to have a leader who wanted us to spend a lot of time on the field, working turnarounds doing, whatever I could to be helpful, etc. to learn the business and build relationships.
Working around the refineries, especially during turnaround, was a crash course in constraint theory and economics.
Good times.
At any rate, all of that was to qualify that most people would not believe how much time and money has been wasted trying to find innovative new ways to serve and capitalize on the CA biodiesel market.
Thank you so much for that. I had tried searches various times and got little information.
Bio fuel is what most people think of when it comes to renewable - though by way of proper refinery processes, none of the issues or perceived issues would exist especially for more modern fuel injection pumps.
Looking at the chart in the article I was kind of surprised at how small wind and solar are globally and that coal is still ~25%.
I believe that it's a physical plant thing. We have spent over a hundred years building hydrocarbon-based energy infrastructure. Much of that is still out there. Wind and solar have made a ton of progress in the last 15 years or so, but it's only really become substantially better financially in the last 5 or so years maybe. It's still going to take decades to actually replace most of that stuff, just as a matter of how fast we can build and install hardware.
Note also that it's a worldwide chart, so it includes developing countries that may not be so quick to jump on projects that are expensive right now even though they'll save a bunch of money in the long term. Though to be fair, some may have a leapfrog effect when it comes to building brand new infrastructure.
I would like to think that the switch to renewables is inevitable, but could a continuous series of administrations similar to the current US admin be enough to curtail it?
Coal is dirt cheap, to the point where most of the cost is in transporting it and the infrastructure to convert it to power is simple and not very capital intensive to it’s the first thing developing countries reach for when they don’t have strict environmental regulations. It also doesn’t require as much precision manufacturing so a lot can be done domestically even in less developed industries, which is important when foreign currencies are in short supply.
That’s because of the primary energy fallacy: https://medium.com/@jan.rosenow/have-we-been-duped-by-the-pr...
TL;DR: the efficiency of converting fossil energy resources into something useful is poor.
That chart is measuring joules of energy. I'm not sure efficiency comes into play here, does it?
Coal provides 175,000,000 TJ of energy. Solar and wind provide 21,000,000 TJ.
I was mostly surprised at how critical coal still is.
The problem is where it's measuring joules of energy. To use cars as an example:
It measures joules of energy as in "how much heat the gasoline we burn produces", some of which we convert to mechanical energy to drive the car, but the majority is just waste heat going out the tailpipe.
By comparison an electric car powered by solar has no tailpipe. There's still a bit of waste heat from electrical resistance, but nowhere near as much.
If we measure like this, by converting a gasoline car to electric (powered by solar for the sake of ignoring some complexity), and driving the same distance, we somehow managed to cut our "energy demand" in half. Despite the fact that we're demanding the exact same thing from the system.
If we measured "joules delivered to the tires of the car" we wouldn't have the same issue. At least until someone starts arguing about how their car is more aerodynamic so joules delivered to the tires should count for more in it.
Edit: We could also go in the other direction. Instead of reporting it as 1kw of solar energy (electricity) it could be 4kw of solar energy (the amount of sunlight shining on the solar panels)... No one does this for obvious reasons, but it's more similar to that primary energy number for fuel in many ways.
The total energy supply figure is a primary energy mix - for the fossil fuels it represents the thermal energy of the fuel. You can look at the final energy consumption section a bit lower to get a different picture taking into account conversion losses.
That is still subject to the primary energy fallacy. Those reports are in terms of primary energy, i.e. how much heat is released by combustion of fossil gas. But in order to replace fossil gas in a chemical plant, you need much less electricity than the primary energy of the fossil gas suggests.
The IEA says[1]:
> For all energy sources, the IEA clearly defines energy production at the point where the energy source becomes a “marketable product” (and not before).
Doesn't that mean if you are burning coal to make electricity, you wouldn't count the heat output because the generated heat is not a marketable product.
[1] https://www.iea.org/commentaries/understanding-and-using-the...
I interpret "marketable product" to mean gas at the wellhead, coal at the mine terminal.
I didn't interpret it that way because of this line from that page:
> [Total Final Consumption] shows the energy that is actually used by final consumers – the energy used in homes, transportation and businesses.
I'm not buying coal at the terminal to power my television.