391–400 of 919 posts
> During the presentation, CATL said its working with partners on the development of electric passenger aircraft practicing aviation-level standards and testing in accordance with aviation-grade safety and quality requirements. Get ready for passenger drones[0], delivery drones[1] and just drones in general, because this is what this breakthrough means really. [0] https://www.youtube.com/watch?v=lw6HDgv4ekE [1] https…
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It is a sign of the success of the oil industry that this analysis always takes the cost of electricity generation back to the source, but assumes that fuel stations pump from a perfect source of naturally refined/distilled hydrocarbons. It is surprisingly difficult to get numbers on how much oil is used to extract, refine and transport oil. The best I found was this: https://www.speakev.com/threads/energy-required-t…
I know Equinor publishes quite detailed numbers from their operations: https://sustainability.equinor.com/climate-tables The headline figure is maybe to compare 11.4 mill. tonnes CO2e emissions from "Scope 1 + Scope 2" (direct emissions from the company plus indirect emissions because they buy electricity and stuff), versus 243 mill. tonnes CO2e from Scope 3 (emissions from people burning the hydrocarbons sold). If t…
https://www.sciencedirect.com/science/article/pii/S030142151...
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In ~15 years if you buy an ICE you also need to afford the gas.
in 15 years there will be so few ice cars on the roads that gas could very well be cheaper than electricity. Finding a gas station may be problematic ( although i doubt truck will move to electricity that soon)
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Not that confusing, only the US measures fuel in gallons, isn't it? Everyone else just uses liters.
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Some people like freedom of choice, I guess. Like in a democracy, where you can vote whatever candidate you like, except here is with your wallet. Others like dictatures.
ICE produce proven carcinogenic pollutants. Your freedom to intoxicate other people goes against their freedom to remain unharmed. (Not to mention noise, environmental damage, geopolitical risks surrounding oil... all well proven stuff)
But I know how harmful heavy handed-mandates can be. I have seen the damage such mandates have already made in other instances with voters being then easily recruited and radicalized by populist politicians.
This is a delicate issue, already highly politicized and deeply hypocritical for both sides. Completely curtailing people’s freedoms is not the way to approach it, if you want to change anything.
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Hybrids that emit carbon will still have a huge effect on global warming, simply because there are so many cars. There isn't a huge amount of headroom for efficiency increases, so you're only going to get anywhere near "net zero" by charging from a renewable grid nearly all the time.
As to whether those hybrids have a 'huge effect' on 'global warming' depends on many factors but assuming the narrative around climate change - the term 'global warming' has been swapped for the latter since the average global temperature has gone down for a number of years after an earlier steady rise - in relation to the CO₂ hypothesis holds truth the main factor of importance is the source of the carbon used in th…
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Volkswagen has already been caught cheating (on its emissions) —- not sure I would trust their claims without an independent third party checking on that.
You can just hop into any diesel Golf/Passat and you'll get 50+ mpg without even trying. No need for third parties.
Finally. A proper engineering breakthrough deservedly getting recognition here. Unlike the mass in-flux of low effort GPT-laden BS promoted by the generative AI grifters. We need more of these foundational breakthroughs and less from the generative AI hype squad.
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> the absolute best theoretical efficiency of this might be 70% I fell down a rabbit hole and found this link, which gives 46% for the theoretical limit for the efficiency of the internal combustion engine. https://physics.stackexchange.com/questions/98966/maximum-th...
Most power generation facilities are natural gas fired, using large aero derivitive gas turbine engines (essentially the same engine that is in the 747 - LM6000 vs CF6 for example) with a combined cycle steam turbine to capture the energy from excess heat. This arrangement has a thermodynamic efficiency of 60%. Even with electrical transmission losses, the efficiency is still far better (1.7X) than having the power p…
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As to whether those hybrids have a 'huge effect' on 'global warming' depends on many factors but assuming the narrative around climate change - the term 'global warming' has been swapped for the latter since the average global temperature has gone down for a number of years after an earlier steady rise - in relation to the CO₂ hypothesis holds truth the main factor of importance is the source of the carbon used in th…
> the term 'global warming' has been swapped for the latter since the average global temperature has gone down for a number of years after an earlier steady rise You're just going to throw that out there? You'll cite the Fischer-Tropsch process, but not "actually global temperatures are declining"? Here[1]. The temperature hasn't gone down. The narrative hasn't changed from global warming because of this (the term wa…
May I suggest a less belligerent/dogmatic attitude when discussing this subject? If the narrative holds it won't change the conclusion. If new data shows the narrative to be false or misleading - e.g. ice core records show the atmospheric CO₂ concentration to lag behind temperature changes, not lead them, climate sensitivity wrt. CO₂ concentration is low, feedback mechanisms are unclear, there are far too many fudge factors in the climate models to make them reliable sources - it will be much easier to adapt to the new situation. We're not talking religious dogma after all but scientific theory, that which can and should be discussed lest it turns into the former.
[1] https://www.washingtonpost.com/news/capital-weather-gang/wp/...
[2] https://www.climate.gov/news-features/climate-qa/why-did-ear...
[3] https://climate.nasa.gov/global-warming-vs-climate-change/