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Doug Bostrom at 17:29 PM on 29 May 2022Skeptical Science New Research for Week #21 2022
One Planet, that may have been me writing that here in 2012. The first time I used it the term was original within the confines of my mind and experience— but with 7.753 billion people on the planet I seriously doubt I was the first to think of it. :-)
"Under the Sky We Make" hopefully is a leading indicator. Not caring about what happens after we're personally dead is maximal nihilism.
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One Planet Only Forever at 12:50 PM on 29 May 2022New study offers a glimmer of hope for climate solutions success
peppers @7,
There is indeed evidence that public perceptions developed due to harmful misleading marketing or a simple lack of concern among richer people are a problem.
The Lincoln MKZ is an interesting case. The luxury sedan had a hybrid model sold at the same price as the non-hybrid model. Yet the hybrid version never exceeded 30% of annual sales.
And there is indeed a pickup popularity problem (that is bigger in Canada and the USA than in other places like Europe).
However, SUVs are not necessarily a serious problem. The serious problem is the over-sized vehicles, particularly the luxury models.
And the fuel efficiency ratings tell the story. My resource for comparing fuel efficiencies is National Resources Canada's "Fuel consumption ratings search tool"
fcr-ccc.nrcan.gc.ca/en
The Lincoln MKZ hybrid model consumption was about 6 litre/100km. The non-hybrid MKZ was about 10 l/100. That significant fuel saving was not enough motivation for the majority of the MKZ buyers.
The comparison of ICE vs Hybrid for general vehicle categories like sedans and SUVs using the Canadian search tool shows the following for 2022 models:
- Subcompacts: No hybrids. Best is Chevy Spark at 7.0 l/100.
- Compacts: Best Hybrid 4.5 l/100. Best ICE 6.2 l/100.
- Midsize: Best Hybrid 4.4. Best ICE 6.4
- Full size: Best Hybrid 4.0. Best ICE 7.1
- Station wagon: Best Hybrid 4.6. Best ICE 7.6
- SUV: Best Hybrid 5.8. Best ICE 7.2
- Minivan: no hybrids. Best ICE 6.6
- Pickups: Best Hybrid 6.3. Best ICE 8.9. Note the F150 hybrid is 9.7. A more important note is that the efficient ICE trucks are diesel which is now understood to produce NOx problems.
So trucks are a problem. And Hybrid SUVs are potentially worse than Hybrid sedans. But the luxury and higher powered sedans are worse than the best SUVs. And the tiny cars are not necessarily better.
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One Planet Only Forever at 07:17 AM on 29 May 2022Skeptical Science New Research for Week #21 2022
Doug,
Unlike wilddouglascounty I was not familiar with the origin or meaning of the term 'homo bolidus'. My internet searches came up empty. But I found it by searching within SkS (back to 2012). It is indeed an appropriate term for the majority of the portion of humanity that wins competitons for superiority.
Coincidentally, I have recently read "Under the Sky We Make" by Kimberly Nicholas PhD. The book promotes the need for a systemic change to a Regenerative Mindset, displacing and correcting the harmful developed influence of the Exploitation Mindset. The author says that without that systemic correction "We are the asteroid".
Though the book is not "research" it is based extensively on published research (and refers to SkS and John Cook). But I may be biased because I found the content to be consistent with my developing understanding of the issue.
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BaerbelW at 01:09 AM on 29 May 2022EGU2022 - A personal diary from a science enthusiast perspective
peppers @2
Thanks for your comment! I can't answer your question though as I kept to sessions related to communication and education. You can however search the conference's program to see if there are relevant abstracts.
https://meetingorganizer.copernicus.org/egu22/sessionprogramme
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peppers at 20:15 PM on 28 May 2022EGU2022 - A personal diary from a science enthusiast perspective
What a detailed and wonderful recount of your convention. Was there any mentions of the Age of Aluminum ( not the movie )? Co2 almost perfectly follows aluminums climb from 85k tons in 1913 to over 22M a year today. It takes 8 times the energy to produce than iron. The more we identify the reasons the better we can calculate.
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peppers at 11:22 AM on 28 May 2022New study offers a glimmer of hope for climate solutions success
I think there may be much more than adding a little reason here or a nudge there to have the public match the concerns. IN 2014 SUV's matched sedan sales and in 2019 they doubled those sales of efficient sedans. Pickup sales almost tripled between 2008 and 2019. The sacrificing is not there. No one is turning in thier stockings to make parachutes for this. This voting with thier wallets covers a larger period of time than mentioned, that spans several political administrations, several rounds of political waverings, and many years of warnings. And it represents a direct cancelling of gains by, say, all new EV sales. This indicates a stronger task than just rephrasing the importance, or some new study indicate.
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Doug Bostrom at 08:04 AM on 28 May 2022New study offers a glimmer of hope for climate solutions success
Louis, the solar panel manufacturing situation is quite a bit more complicated than you imply.
Here's a fairly deeply reported story on that:
Which solar panels are made in America? (2022 edition)
Reading all the way to the end, we end up with four manufacturers with all parts created in the US. Many more source polysilicon from overseas, with everything else made in the US. Others are a more mixed bag.
But "no solar panels are made in the US, all of them come from China" is misinformation.
(Not as a slight personally directed to Louis but more as a remark on behavior we all more or less share, it required about 5 minutes to learn what's actually true in this particular situation.)
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Doug Bostrom at 05:57 AM on 28 May 2022EGU2022 - A personal diary from a science enthusiast perspective
Thanks, Baerbel.
Conscious practice of geoethics seems like a way forward to stop thoughtlessly stealing from people living now and in the future.
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Doug Bostrom at 05:37 AM on 28 May 2022Skeptical Science New Research for Week #21 2022
Sorry Joel, that was a bit of an accounting joke. Given that Deloitte grew its first roots in financial accountancy, "in the red" is bad, and "in the black" is good.
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Joel_Huberman at 00:06 AM on 28 May 2022Skeptical Science New Research for Week #21 2022
I found this to be confusing: " Conversely, not acting as Homo bolidus will see us squarely in the black," when the Deloitte report actually says that acting boldly to mitigate global warming will bring us prosperity.
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wilddouglascounty at 23:42 PM on 27 May 2022Skeptical Science New Research for Week #21 2022
Thanks, Doug, for resurrecting the Homo bolidus designation for our species. I'd forgotten about that, but given the many recent demonstrations of our (in)ability to use our intelligence to change the trajectory of our collective activities, I'd say that we're definitely destined to be a brief but impactful flash in the evolutionary pan of our planet.
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nigelj at 07:59 AM on 27 May 2022New study offers a glimmer of hope for climate solutions success
louislorenziprince
The article wasn't really getting into a discussion about the merits of different power sources. It was more about how human behaviour can be factored into predictive models. However that might include concerns about reliance on China, and human perceptions of nuclear power, which are generally quite negative in America.
Nuclear power is indeed largely self reliant and does have some merits imo, but it is not a panacea. It has various downsides like high capital costs and its slow to design and build and there is public resistance. But this is not the right page to discuss nuclear power.My point is only that it has positives and negatives that would both have to inform any predictive model
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JHBrewer at 05:36 AM on 27 May 2022What role for small modular nuclear reactors in combating climate change?
There are two main "political" arguments against nuclear reactors as an avenue to decarbonization of our electrical power supply:
1) They are too expensive and take too long to build, whereas solar and wind are cheap and quick.
2) They are dangerous because of the possibility of radioactive materials escaping into the environment.
Let's examine these arguments:
A modest wind farm costs about $15M, takes about 2 months to install and generates about 15 MW of power when the wind blows. That's $1/W at best. The installation is quick because wind turbines are being mass-produced in factories already. It would take a lot longer if every wind farm had to be built "from scratch" the way reactors have been in the past. The USA has been adding about 20 GW/year of wind capacity, and now has a net wind capacity of around 150 GW at a net cost of around $150 billion. To reach the total national power requirement (490 GW) should take about 17 years and cost about another $340 billion. We may want to increase the total capacity to account for windless days.
Prototypes of the proposed SMRs (Small Modular Reactors) are now under construction. Once factories are built to mass produce them the way wind turbines are, proponents predict, a new 300 MW SMR can be turned out every 4 years (per factory) at a cost of about $1.5 billion each. Thus it would take over a thousand new SMRs at a cost of around $1.7 trillion to take over the capacity now supplied by other means. Worse yet, if there were only one supplier with one factory, it would take 4,000 years. So obviously we'd need 100 such factories to get it done soon enough to help.
Of course, the operating lifetime of a reactor is at least half a century; wind turbines last at most half that long before they need replacing. But my "back of the envelope" estimates tentatively agree with the RE claims. Let's do both, and install appropriate power where needed.
Now, as to the hazards of radiation... please see https://citizendium.org/wiki/Radiation_Hazards
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Evan at 01:53 AM on 27 May 2022Planetary Diets
wilddouglascounty, thanks for the feedback. Unless I get comments, it's difficult to know what does and does not "click" with people. There is a lot of confusion about committed warming, expected warming, and what we can do about it. Trying to clarify the science and the terminology so that it is understandable is a challenge. It therefore helps to have feedback, such as yours, about which analogies effectively accomplish their "mission".
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macquigg at 01:29 AM on 27 May 2022What role for small modular nuclear reactors in combating climate change?
I have been designated as editor for a series of articles on small modular reactors. The focus is to be on the issues of safety, waste management, weapons proliferation, and cost. We have the first article ready for review. https://citizendium.org/wiki/Nuclear_power_reconsidered
This top article asks the questions. We have asked companies that are working on new reactor designs to answer these questions in an article that they will own. Critiques and independent analysis will be included on a discussion page for each design.
We have a response from one company, ThorCon Power LLC. The others are still just stub articles. https://citizendium.org/wiki/ThorCon_nuclear_reactor
Comments will be appreciated.
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louislorenziprince at 00:01 AM on 27 May 2022New study offers a glimmer of hope for climate solutions success
This article talks about "renewables" but makes no mention of the fact that no solar panels are made in the US, all of them come from China. Should the US be totally dependent on China for panels? Also, no mention of nuclear power, which is the most reliable and self-reliant source of power for the future.
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One Planet Only Forever at 11:38 AM on 26 May 2022New study offers a glimmer of hope for climate solutions success
Nigelj,
The US polarized politics is like a Sport if one team tried to limit harm done and the other team tried to maximize harm done.
One US team fights any way they can get away with to protect their team's interests from 'restrictions on how harmful they can benefit from being'. They powerfully resist learning to be less harmful.
The other US team also fight against restrictions of harm that their team would benefit from, just not as aggressively as the more passionately harmful team..
That US harmful competitive reality is likely the result of the free-for-all fight for status that is a fundamental aspect of the American experiment in maximizing freedoms. That is an experiment that is harmfully failing but the players won't admit it because that would mean they would have to learn to accept that less freedom is better. They would also have to admit they owe compensation for the harm they have benefited from.
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nigelj at 08:05 AM on 26 May 2022New study offers a glimmer of hope for climate solutions success
"Several of these factors tend to act against climate solutions in the United States, with its population heavily politically polarized and government policy not very responsive to public opinion in any event, perhaps due largely to structural status quo biases."
Very true. Its like American politics has turned into a contest between republicans and democrats that exists for its own sake like a sport. Feuds can go on for decades.
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One Planet Only Forever at 06:17 AM on 26 May 2022Breaking Through Twitter's Spiral of Silence with the #ClimateDaily Pledge
Aeyles @3,
Anyone making reference to Biblical points could be challenged by the following 'biblical understanding'.
The Bible requires its adherents to be stewards of God's creation, not be harmful unsustainable exploiters of God's creation.
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One Planet Only Forever at 06:07 AM on 26 May 2022New study offers a glimmer of hope for climate solutions success
This study reinforces the understanding that without significant socioeconomic and political system changes the future of humanity will suffer the massive harmful consequences of warming impacts exceeding 1.5 C.
Note that the peak warming and when the peak impact is achieved, not the warming impact by 2100 with more warming to follow, is required to determine the potential required adaptations.
And it needs to be pointed out that the producers of the future problem owe the harmed people of the future (and harmed current day people) significant help by developing adaptations that are sustainable in the harmed future they are creating.
An important systemic change is learning that development that results in increased energy consumption, or any other increased per capita consumption beyond the minimum consumption needed to live decently, is not improvement or advancement. Developments that require less consumption, and that reduce harm done by the consumption (ideally no waste), are needed. And socioeconomic-political systems that will reward and ecourage that (and discourage and penalize the opposite) need to be developed strengthened and maintained.
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One Planet Only Forever at 01:53 AM on 26 May 2022Skeptical Science New Research for Week #20 2022
The SpaceX Falcon 9 rockets that put all those satellites up there burn kerosene. A recent CBC News item "Time to consider the impact of rocket exhaust on the atmospere" exposes the harm of the cheaper easier way of fossil fuel launching rockets.
Another consideration regarding increased internet use, particularly for HD video, is a high energy demand. The reduction of energy demand, especially by the supposedly more advanced and higher status supposedly superior humans, is an essential part of the changes required to limit the harm done to the future of humanity.
And yet other consideration regarding the addition of sattelites is the way they interfere with planet surface based space observation.
Another concern regarding all the rocket launching is the addition of future space debris and the impact of the parts that fall back to earth.
More newer technology is not necessarily advancement.
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nigelj at 11:49 AM on 25 May 2022Skeptical Science New Research for Week #20 2022
Elon Musk also has this "starlink" project to bring internet to rural areas across the entire planet:
www.cnet.com/home/internet/starlink-satellite-internet-explained/
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Aeyles at 01:55 AM on 25 May 2022Skeptical Science New Research for Week #20 2022
The global trend of moving from rural areas to cities may experience a pause in developed countries. Some power providers serving rural areas have installed fibre grids on existing physical networks. These have enabled rural dwellers to tap the fiber optic infrastructure, making it possible for internet workers to stay put. The presence of fiber on the pole in the yard has also increased the price of residential real estate. Savings from not having to drive to work, both in dollars and energy, are welcome developments.
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wilddouglascounty at 01:14 AM on 25 May 2022Planetary Diets
Another factor, of course, is the age of the person and the "age" of the economy. A young person in the armed services who is physically quite active, burns a heck of a lot more calories than the retiring 67 year old general leading the troops. This gets a lot more complicated very quickly: can the young private consume more calories without affecting the overall food supply, and can the general cut back on his dietary choices despite easier access to very rich and expensive options? And how many staff have to be fed to provide the support network for each?
I like the analogy, which anyone who has tried to lose weight will instantly understand the difficulty of, and as you said, it's even more complicated than the analogy. Its also useful in that needed sacrifices to accomplish the goal depends on a good understanding of the variables and not a small measure of willpower. Thanks for this!
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Doug Bostrom at 09:10 AM on 23 May 2022Breaking Through Twitter's Spiral of Silence with the #ClimateDaily Pledge
Here's a freshly published article directly relevant to this campaign:
Open access.
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Aeyles at 04:10 AM on 22 May 2022Breaking Through Twitter's Spiral of Silence with the #ClimateDaily Pledge
I think SKS would have to clearly state that the Christian Bible is not a source of peer-reviewed science and that political opinions do not trump peer reviewed science. Since SKS prohibits discussions about religion and politics, could this be done?
Moderator Response:[DB] Off-topic and moderation complaints snipped. Really, you know better.
Please stay on-topic.
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Aeyles at 03:57 AM on 22 May 2022Breaking Through Twitter's Spiral of Silence with the #ClimateDaily Pledge
Most of my discussions about peer reviewed climate science result in rebuttals about what the Bible says, or a popular political opinion from a prominent corporate leader. Any advice on that?
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Doug Bostrom at 10:10 AM on 21 May 2022Breaking Through Twitter's Spiral of Silence with the #ClimateDaily Pledge
Climate silence is climate surrender.
It's worth noting that many people won't talk about climate change in online venues (or standing at a vista in a national park for that matter) because what stands for discourse around climate change is often dominated by ovewrought, highly emotional people expressing their fear of climate change, climate mitigation and climate adaptation as dismissal of the fairly simple handful of basic principles governing the climate. These few make talking about climate change extremely unpleasant.
So, one must either swallow one's feelings of repugnance for the process of dealing with such folks, or clam up. It's of course far easier to do the latter. Particularly, everybody has limits of patience, and repeatedly dealing with the same fundamentally misguided and flawed opinions expressed in heated and often personal expressions becomes boring and hence exhausting.
In short , anybody with a significant number of followers and committing to daily climate change reminders is going to encounter some tiresome crap.
"Be a Marine" and deal with it. But here are a few tips to keep help things centered and most importantly useful.
- The audience for disagreement is not those who are talking but those who are only reading. Write for the bystander. Make it easier for bystanders to understand what they're truly learning by witnessing disagreement, namely that there is no actual basis for disagreement and that disagreement is not only not rooted in what we know about climate systems but rather in matters having nothing to do with climate science itself.
- Ad hominem remarks are a means to change the subject. Don't let the subject be changed— stick with the topic of climate change, remind bystanders of the purpose of ad hominem remarks (whether directed to yourself, other individuals or entire classes of persons).
- Any remark dismissing or disagreeing with consensus agreement among the actual scientific community on matters of climate change -must- be accompanied by a citation to published research. Insist on this. Keep reminding the interlocutor of their deficiency until this is accomplished, or their energy is sapped.
- Aside from a small handful of professionals, folks popping up to disagree with common sense are expressing their fear of something else. Remind them (and bystanders) of this.
- You will be challenged to explain why fringe theories are wrong, or engage in discussion over quibbles. Don't waste your time on this when the work of doing that has already been accomplished. As Steve says, lean on others; there are no new counter-arguments to scientific consensus left to explore, and more or less all of them are covered here at Skeptical Science. You won't change your interlocutor's mind but pushing a link to correction provides a service to bystanders.
- In short, educating bystanders is the only useful purpose for engaging with disagreement on climate change in any public forum. Exploit opportunities to the fullest extent possible— which is not complicated.
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Bob Loblaw at 04:54 AM on 21 May 2022The kids are not OK
Yes, the willingness to contemplate that one's initial judgment may be incorrect is a sign of a real skeptic and scientist. Whether it is with respect to scientific conclusions, or with respect to what an audience might be interested in hearing, it shows some openness to being swayed by evidence.
If you look at the situation in the climate discussions, the simple question "what would it take to change your mind?" will tell you a lot about someone's level of reasoning on the subject.
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One Planet Only Forever at 00:55 AM on 21 May 2022Breaking Through Twitter's Spiral of Silence with the #ClimateDaily Pledge
The Spiral of Silence problem is likely partly, and maybe significantly, a result of the development of inflexible minds.
See my comment on the recent SkS reposting of "The kids are not OK".
As the recent BBC Ideas video "How new experiences 'rewire' your brain" explains things, people can respond to encountering something new or unexpected (prediction error - meaning not what a person's experience-based learning would lead them to initially expect) by flexible learning or inflexible resistance to learning (resisting changing their developed beliefs).
People who are less flexible thinkers can learn to become more flexible thinkers. But if they developed their identity as part of a group that includes inflexible thinkers on an issue they risk being rejected from that group if they question and try to change the developed beliefs, even if the developed beliefs are contradicted by evidence or are understandably misunderstandings that are harmful to others.
Harmful influencers who understand this will try to limit the raising of awareness or improvement of understanding. They will fight against the need to learn to limit and correct harmful lack of awareness and harmful misunderstanding.
It would be great if Social Media Star Influencers would become part of the team that tries to raise awareness and limit and correct harmful misunderstanding. However, those people risk losing 'likes (and related profit)' if they do that.
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One Planet Only Forever at 03:24 AM on 20 May 2022The kids are not OK
The author's flexibility in response to experiencing something inconsistent with her developed thoughts and expectations is a great example of an important understanding regarding people who resist accepting climate science and the related need to change developed ways of living and change related developed beliefs.
The recent BBC Ideas item "How new experiences 'rewire' your brain" is a brilliant 4 minute presentation regarding the value of developing the ability for flexible thinking.
As the BBC item states it helpful learning is about helpfully changing your mind in response to encountering a "prediction error". You learn to reduce the chance of future "prediction error". That can reduce stress, anxiety and related anger.
A lack of diversity of experience and a developed set of passionately held beliefs related to that limited experience can result in a lack of flexibility in response to encountering a "prediction error".
In my work as an engineer I often encountered inflexible thinking due to motivations for things to be cheaper or done quicker in pursuit of higher profitability. The people with the "profit motive" would create ethical conflicts of interest. And trying to explain the technical reason they could not get what they wanted pften failed to convince them, failed to change their mind. In some cases persisting in the attempt to explain why they could not maintain their desired beliefs and get what they wanted made them angrier.
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Doug Bostrom at 02:35 AM on 18 May 2022The kids are not OK
A few years ago I assisted our local high school with a "climate fair," a two-day event organized at the insistence of the school's students. This effort was mounted against opposition that was not rooted in disagrement but rather inertia and the administration's preferences to practice "business as usual," that business already being quite sufficiently difficult. A metaphor, of sorts.
The hardest part of the work was the lying. Summarizing our challenges while simultaneously recognizing the various cultural forces arrayed in opposition to repair leaves no room for honest optimism, yet our duty as adults is to offer hope to children. I found myself bereft of cause for hope, and thus in a position of daily lying.
Apparently lying isn't enough, per this article.
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nigelj at 12:07 PM on 15 May 2022Why and How to Electrify Everything
The thing is if the heat pump cuts out at very low temperatures, have a few basic fan heaters or convection heaters available. They are very low cost to buy these days, and you wont be running them too often.
"Dont make the perfect the enemy of the good" (Voltaire)
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michael sweet at 22:46 PM on 14 May 2022Flying is worse for the climate than you think
There is also the possibility of future production of aviation fuel using CO2 captured from the air and renewable electricity (electrofuels). This article describes the process and estimates that the cost of electrofuel would be about $4 per liter today. The projected cost would drop to below $1 per liter in 2050. $1 per liter is comparable to current fossil jet fuel. I note that fossil jet fuel is likely to increase in price in the future.
To me the point is that it is possible to make jet fuel with no net release of CO2 into the atmosphere if you are willing to pay for it. Today we simply avoid the payments by shifting the cost to future generations.
The technologies exist to convert the economy to completely renewable energy once governments have the will to make those changes. Then we will not have to worry about the Russians or OPEC damaging the economy by witholding oil from the market (and we will address climate change).
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nigelj at 11:52 AM on 14 May 2022Flying is worse for the climate than you think
Lawrie @6. Traditional fossil fuels are not identical to effects on climate to biofuels. Traditional aviation jet fuel uses hydrocarbons that have been lying in the ground for millenia so they are essentially a new pulse of CO2 into the atmosphere. Biofuels are adding a pulse of CO2 that is the same as the CO2 their biomass removed shortly before, so they are effectively carbon neutral. (Ignoring carbon used in manufacturing the biofuels).
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Lawrie at 10:05 AM on 14 May 2022Flying is worse for the climate than you think
Thanks Eclectic @4. As a scientist I have always found the term biofuels to be problematic. Bio implies userfriendliness to the atmosphere. If jet fuels are constrained to hydrocarbons of similar energy density to currently used jet fuel then for climate change purposes CO2 emissions will be identical. We might feel better but the atmosphere won't notice any difference.
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Irivlin at 13:31 PM on 13 May 2022Volcanoes emit more CO2 than humans
Respectfully, I believe we're all missing the point.
I don't care if global warming is occurring and I care even less if it's human activity that the culprit. If we don't like CO² (I like CO², because it increases crop yields in a hungry world), then either live like a caveman and don't use fossil fuels or go nuclear (my preferred option). Clearly solar and wind are not the answer. Insulation and self denial are not the answer. These just assist in reducing energy. (Improving the aerodynamics of a car is pointless, if there's no engine).
We need less people on the planet and - most of all - less politicians)
Moderator Response:[DB] The topic of this post is about how human activities release vastly more greenhouse gases into the active carbon cycle than do al the volcanoes on Earth combined. Please stay on-topic. Off-topic snipped.
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Philippe Chantreau at 04:10 AM on 13 May 2022Flying is worse for the climate than you think
The video takes a rather drastic shortcut when it comes NOx emissions. The overall long term effect of NOx at altitude is likely to be a net negative radiative forcing because of the shortening of the methane residence time. The effect of contrail clouds is more difficult to ascertain and is likely a small net positive. Of course, the CO2 emissions remain the main concern, but presenting NOx emissions as making flying even worse is misleading. The whole picture is more complex.
There is very large uncertainty as to the total net forcing and how it compares to the CO2 forcing alone. It is pretty much admitted, however, that the total net forcing is higher than the CO2 forcing alone.
NOx is much more of a concern for low altitude operations and air quality around airports. Unfortunately, a similar trade-off exists to that of diesel engines for cars and reducing NOx involves higher CO2 emissions.
The truth remains that aviation is the most bang for the buck that burning hydrocarbons can deliver. That is where energy density really hits the spot. Unlike many other applications, there is currently no viable, or even prospective, alternative technology that comes close to the performance obtained with ICEs for propelling aircrafts. This holds true for both turbines and reciprocating, the latter being surprisingly more efficient in that role than is ususally believed. If we are to give attention to low hanging fruits, aviation certainly is not one of them (no pun intended).
The only electric aircraft I know of that is currently well engaged in the certification process is ALICE. When ready, it will carry 8-10 passengers over 5 to 600 miles at speeds around 220 to 240 knots. That is the level of performance of a King-Air 200, without the ability to refuel and be ready for flight again in less than 30 min.
Biofuels produced with clean energy are the best bet for a future carbon neutral aviation. However, if all electricity production and terrestrial transportation could be carbon free, aviation would not be a much of a factor, as only these 2 dwarf aviation emissions.
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Daniel Bailey at 02:25 AM on 13 May 2022Why and How to Electrify Everything
@David-acct, properly-equipped Mitsubishi Hyper Heat mini-split ductless systems can function to as low as -25 F. When such systems hit their base limit, they do shut down until temperatures rise above those minimal levels. In northern climates, the point is to pair these systems with backup systems that can take over in the event of really cold airmasses dropping out of the Arctic for those few times per year that they actually occur. No one is saying to use them as a standalone solution for all cases and climates.
- Just a guy who used to sell those systems for a time in Northern Michigan.
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Eclectic at 21:09 PM on 12 May 2022Flying is worse for the climate than you think
Lawrie @3 , as far as jetfuels are concerned, their composition is described as predominantly hydrocarbon chains of C9 - C16 length (kerosene-like). "Biofuels" for jet engines have a similar composition ~ in part to allow usage in the already-existing modern jet engines (and in legacy jet engines too). It would be problematic to re-design / re-manufacture jet engines to use short-chain hydrocarbon fuels such as alcohols. And alcohols, although cheaper to produce, have lower energy density and would be proportionately heavier to carry : as well as requiring larger & therefore heavier tanks.
What exactly are biofuels, you ask? A loose definition would be :- any hydrocarbon molecule of one or more carbon atoms, derived from feedstock that has grown in recent years (say, less than 100 years) . . . as opposed to fossil fuels ~ where the feedstock comes from organisms that grew 100+ million years ago. An easy difference !
Why use the term "biofuels" ? A convenient term, since it is brief and people intuitively know what is meant by it.
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Doug Bostrom at 17:47 PM on 12 May 2022Why and How to Electrify Everything
Point of clarification: heat pumps don't "stop working" at a certain temperature. Their efficiency becomes less, and at a certain point they'll not be able to keep up with load.
In combination w/backup heat sources, the net result in practice is that heat pumps still substantially reduce energy consumption even at very low air source temperature. That portion of gain which is not obtained via combustion (near or far) is "electrified."
Performance in lower source temperature is exhaustively covered here (w/state of the art off-the-shelf equipment as of 7 years ago):
Cold Climate Air Source Heat Pump (Minnesota Department of Commerce, Division of Energy Resources)
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Lawrie at 14:05 PM on 12 May 2022Flying is worse for the climate than you think
walschuler talks of biofuels. Does anyone know what the chemical composition of "biofuels" is and how they compare with standard jet fuel for CO2 emissions? Strictly speaking are not fossil fuels also biofuels?
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David-acct at 12:16 PM on 12 May 2022Why and How to Electrify Everything
Dana1981
your link to the heatpumps indicate they only work down to -10f & -13f
"Fujitsu cold climate heat pumps (AOU line) have a lot in common with Mitsubishi’s. But instead of delivering 100% of their capacity down to 5F, all but the smallest Fujitsu models offer 75-95% of their capacity. They’re rated to work down to -10F, just above Mitsubishi’s -13F."
That doesnt do much good when places like MN, MT, ND, SD regularly have 1-2 weeks at a time with -20f . Further
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Eclectic at 07:39 AM on 12 May 2022Why and How to Electrify Everything
Doug @12 , thank you for that information.
I am not sure what is happening with the new vaunted pouch cell battery : but apparently Bolt advertises a very brisk 0-60 mph time . . . the sort of time which ( a few decades ago ) required a large sporty V8 engine.
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Doug Bostrom at 02:35 AM on 12 May 2022Why and How to Electrify Everything
Eclectic, happy to answer.
Our vehicle is rarely discharged below 1/5th of remaining capacity, usually charged only to about 90% so that "one pedal driving" is fully available (another absolute boon thanks leaping from the 19th to 21st century). We rarely fast charge. As well, this car (Bolt) doesn't fast charge above 55kW, which for one who cares about battery longevity is indeed a good thing. W/regard to regenerative braking, I've seen return to battery hitting 70kW but it's not a problem as these events are very short and don't last long enough to expose imperfect cooling distribution in individual cells (due to engineering constraints on thermal management cells end up with a thermal gradient under prolonged high current in or out, which is not good due to pchem issues).
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walschuler at 00:19 AM on 12 May 2022Flying is worse for the climate than you think
I think that biofuel, properly sourced, is the obvious and most scalable short term solution to the carbon footprint of aviation. Both United and KLM have demonstrated transatlantic flights on pure biofuel. The airlines should be first in line for properly raised biofuel and should be given deadlines for conversion, or airports or countries could incentivize the conversion by giving better terminal slots, reductuions in landing fees, or higher scores in route bids for use of biofuel. New high speed land connections are of course feasible but as a rule they are anything but short term projects. Biofuels for long distance oceanic shipping ought to be second in line.
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dana1981 at 14:13 PM on 11 May 2022Why and How to Electrify Everything
Cold climate heat pumps: https://carbonswitch.com/best-cold-climate-heat-pump/
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Eclectic at 10:01 AM on 11 May 2022Why and How to Electrify Everything
Indeed, Doug Bostrom @9 , it appears the commenter "Iain R" has not been keeping up with advances. In his post @3 , he claims that 'clean' electricity from renewables is an unworkable proposition, owing to the grid becoming "uncontrollable".
Iain R 's opinions are 10 years out of date. The evidence is in the South Australian example [mentioned @5 above] ~ where a big Tesla battery provides millisecond matching of load demand on the electricity grid, along with frequency control. All this is very desirable for electricity generators. And that ability, combined with grid market arbitraging, has made the S.A. Tesla big battery so profitable for the company owning it, that it has quickly paid off the battery's capital cost. And the company has even recently enlarged the battery by 50% .
It is a marvel how obsolete ideas can linger on.
(B) Slightly off-topic, Doug, but could you comment on how your car's (lithium?) battery battery is doing so well. Is this despite you "abusing" it with rapid recharges and lots of regenerative braking? . . . or are you babying it: with trickle charges, gentle accelerations, 20-80% charge cycles, and suchlike?
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Doug Bostrom at 09:02 AM on 11 May 2022Flying is worse for the climate than you think
"Ghost Flights" can be thought of as a bright point of distinction as to whether governmental climate change mitigation policy is working at anything roughly approaching an effectively systemic level.
To Adam's thoughts on "fixing flying," I'd add: accept that flying costs more than we're paying. As with other of our activities, the cost of flying is artificially low because we're burning a messy fuel from the past that we didn't make and pushing the result onto people in the future, with no plan or intent to pay back. For our immediate benefit, we're stealing the future from other people.
Air travel at today's cost to us is theft.
When the dust settles, it's highly unlikely that a fully accounted air fare from point A to point B will be as strangely "cheap" as it is now, once theft is removed from the equation. A reformed thief accepts that muggings are no longer part of everyday living. Our habits and expectations will likely need to change.
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Doug Bostrom at 08:42 AM on 11 May 2022Why and How to Electrify Everything
"Spinning mass" indeed used to be a challenging replacement problem to solve, for keeping voltage and AC frequency stable on the grid. That's now a fully solved technical problem, and in fact when one thinks through the fundamental physics of the matter, notional "solid state" grid stabilization is inherently more effective than KE in massive rotors in generators, "slow" ramping of PE from steam and combustion throttling, moderator rod insertion/removal and the like.
Similarly it used to be the case that heat pumps were largely ineffective in even fairly "mild" temperatures. No more.
It's no wonder we get stuck in the past, at least a little bit. Personally I'm having a hard time adjusting my own head to progress. I'd never have believed only 10 years ago that I'd own an automobile capable of traveling 300 miles on a fundamentally squishy and historically unreliable pot of electrochemistry, but here I am today, with a four year old EV having 50,000 miles on the clock and no sign of degradation in the chemistry mess powering it. And driving the thing makes me feel like I'm 16 again, for better or worse. It's far better than the Victorian-era tech I used have under the hood— in 2017 and 116 years after Vickie shuffled her mortal coil.
Things change and we must keep up!
