Nissan Motor Co. said it has developed a new type of paint that significantly reduces the temperature inside vehicles parked in direct sunlight.
The surface of a car coated with the innovative material remains up to 12 degrees cooler than that of a vehicle with standard paint, tests showed.
The company said the coating material can help rein in the temperature rise not only on the car’s body but also in the vehicle when exposed to direct sunlight.
Can they develop a paint that reduces the amount of cars? That would be more helpful.
🙄
This might match your criteria:
(Jokes aside, I do agree with your sentiment)
I don’t understand, why did you post a random picture of some pavement ?
Why did you post a picture of an empty street?
There’s no paint on the planet that will make most of their cars cool.
I seriously doubt that, tests have been performed comparing black and white painted cars, and the difference was insignificant. The heat buildup in a car is due to the the sunlight entering through the windows.
To add to your comment, ceramic window tint is a night and day difference. My steering wheel, shifter, and all couldn’t be touched after work. I wore driving gloves to get home. With the tint there slightly warm and the AC doesn’t take half the drive to catch up, the car is cool by the first stop light.
Maybe they should sell cars with that by default instead?
Is ceramic tint different from ordinary tint?
Yes. It contains ceramic nano particles that reflect UV without interfering with visibility.
trick is to paint the windows
Also this is problematic:
12 degrees cooler
But by what scale? If it’s Flaffenfeit, it’s just half an ounce!!!
And an ounce is nowhere close to a decimeter!
I bet Kelvin couldn’t agree more. But to be fair, he started a bit on the negative side. And called everything above that plus.
A bushel of paint should be enough to cover 12 roods.
Dammit, I needed 5.5 qt paint to cover one parking spot
Our European friends are going to need you to convert that to kilometers.
Could you link one of these? All the ones that I can find say there’s quite a bit of a difference
OK I’ll link the danish test, this test is done with 2 cars that are identical, except for the color of the paint:
Konklusionen er altså, at den sorte bil ikke varmes mærkbart mere op end den hvide.
Translation:
The conclusion is that the black car does not heat up noticeably more in the sun than the white.So it does a little bit that you can measure, but not enough to really make a difference.
Det skyldes ifølge Christian Bahl, seniorforsker hos DTU Energi, at bilerne opvarmes gennem ruderne.
According to Christian Bahl senior researcher at DTU energy, that is because the cars are heated through the windows.
(DTU is a well recognized institution for scientific research in Denmark.)Maybe the fact that the experiment was done when outside were only 20-22 degrees made the difference less noticeable? Otherwise I can’t explain why all the other tests I’ve found said the difference was 5-10+ degrees.
This is the t-shirt one I remember.
From
https://mainichi.jp/english/articles/20230726/p2a/00m/0sc/014000c
Sorry can’t find it, all I can find in english are some where the data isn’t clear.
If a white car has brighter interior it will stay slightly cooler, I cannot find a test where everything is the same except the color of the car.
What I can say however, is that the test I saw was performed in Denmark. It’s possible countries with hotter climates may observe some difference?Obviously the main source of heat is what enters through the windows, and how much is reflected out again does have an influence.,
If a white car has white seats and interior, they will obviously not heat as much as black seats and interior.
The white color on the exterior will also reflect more light into the car, except maybe at noon.
Edit PS:
I linked the danish test in a new response.Obviously the main source of heat is what enters through the windows, and how much is reflected out again does have an influence.,
A lot of things seem obvious but turn out not to be, or not as much as I’ve first thought. Hence the usefulness of data and studies rather than mere reasoning.
They should install automated blinds like some high end luxury cars have except make them out of that silvery windscreen sunshade stuff.
They should install automated blinds like some high end luxury cars have except make them out of that silvery windscreen sunshade stuff instead of developing this paint…
Got in my car after work yesterday and it was 102F inside. It was awful
Lucky! I’ve seen 150 here in Louisiana.
And even higher when I lived in the Mojave desert. Like, if you didn’t leave a window cracked there’s a real chance your windshield cracks.
I live in Pa, so our weather isn’t crazy hot like the south. I can’t imagine the weather where you’ve lived. 85F is my upper limit. Anything over makes me feel like I’m going to die.
I was working outside in 96F and nearly 50% humidity within the past week.
If we continue trying to work outside during the middle of the summer day, as our summers get hotter every year, people are going to start to die.
I wonder how many it will take for America to adjust. I assume a lot more than I’m comfortable with.
I was outside in 96F yesterday herding my ducks for 10 mins and my whole night was ruined because I got so sick from the heat.
Idk how people who work outside constantly do it
Must have had you wishing for a nuclear winter.
wouldn’t this also work on buildings? pavement?
great video. Its wild that it is functioning as an IR emitter and just beaming things into space.
Probably yes, but it may not actually be doable. Not just because of how much there is to paint, but because the energy doesn’t just evaporate. It’s got to go somewhere. In this case I’m assuming it’s reflected, even if diffused. If everything does this, things that don’t (people, cars, pets, etc) will get all that extra energy.
Wouldn’t want to end up in a situation like this: https://www.businessinsider.com/death-ray-skyscraper-is-wreaking-havoc-on-london-for-a-few-totally-insane-reasons-2015-7
The amount of folks who have melted their shitty low quality thermoplastic patio furniture with their sliding glass windows will always amuse me, but overall I don’t consider IR radiation to be a big problem. Using a bunch of VOCs to paint everything and pollute a city would be though.
You ever seen that curved building that focused the sunlight into a spot in front of it and melted cars? Lol
You mean the one in the comment that the comment you replied to mentioned and linked to?
It can reflect it out to space. It is possible to make paint the keeps things below ambient. Obviously you’re correct, but only for things not facing upward. Upward facing things will bounce the energy back away from Earth.
Oh great so now the rest of the universe has to deal with it. Really just kicking the can aren’t we
Ok, so don’t paint it on any concave surfaces. Most buildings have flat or convex surfaces.
No, only Nissans. It says right there.
Is metal paint and concrete paint the same thing? I’m not a painter
Metal paint is concrete paint. Microsoft paint is abstract paint. This comment is metaphorical paint.
Ultimately, they can be, but there’s lots of differences between them once they reach the bucket you buy. They have different adhesion qualities, but that could be addressed with an appropriate primer. They have different final finish surface requirements, which could be an issue for how the paint works. I remember seeing dragonfly-wing-style paint that was white when viewed perfectly straight buy blue when viewed at any off angle due to a microscopic vertical grid of blue walls. There may also be a required clearcoat component that may not be compatible between the two surfaces. Metal paint is also designed to handle the flex of metal where as concrete paint would barely be concerned about that but possible address crumbling instead.
Edit: and after reading the article, it’s a radiative-cooling paint rather than a reflecting coating. Concrete has a much lower thermal conductivity so this may not be effective in transferring heat out of the concrete.
12 degree °C or °F???
°C, which is not bad. Official press release (I think): https://global.nissannews.com/en/releases/nissan-trialing-cool-paint-technology
Considering it’s no an American brand I’d say Celsius
They’re currently working hard for a way to make it subscription.
Unlocked via subscription
Nissan invents white paint
If it’s like this stuff then it’s more than just white paint.
I was hoping I’d see nighthawkinlight in the wild here.
Only reason I’m here lol
If it’s like that stuff then they didn’t invent it.
Well, they would have invented the specific formulation they’re using. I’m sure it’s not exactly like this but I wouldn’t be surprised if it’s the same concept with microbeads.
No one invents anything totally new. It’s all adding on to what others have made in the past. Nothing has ever been created from scratch.
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12 degrees on roof, 5 on car seat. It’s in the article
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Hello and welcome. The purpose of this forum is for people to share articles, and then discuss the contents of the article they just read. If that’s not what you’re here to do, please spend your time elsewhere.
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Asahi is perfectly legitimate and one of Japan’s largest news organizations.
Just because you haven’t heard of something doesn’t mean there’s anything wrong with it.
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You said you’re “not about to click on it”, which is implying that you think it is not a good news source.
And that’s 12 degrees Celsius (21.6 degrees Fahrenheit)! What kind of garbage article doesn’t include the units!?
I agree clarification never hurts, but the entire world except for ~4% of highly entitled population will read that right.
Given that a lot of English language media are either located in the US or target the US market, I’d expect the value to be expressed in Fahrenheit unless stated otherwise.
Original article is about Asia, and Lemmy is an international platform, so neither applies here
I don’t mind some actually regional things presented in whatever system they use in there - although I’d much prefer if we’d all go metric already. C’mon!
The original article is not about Asia, it’s about a technical innovation. Regardless, although we’re on an international platform, it’s easy to see that many topics are US-centered, and many sources too - regardless of the subject.
“Asia&Japan Watch” is right under their name.
This topic is not centered in the US by any metric. It’s just an example of a Lemmy bias.
a lot of English language media are either located in the US or target the US market
or target the US market
So regardless of the website’s name or origin, it could be an English language outlet targeted at the US audience. Which is quite common. Which is why I explicitly added this remark to the comment you initially replied.
So why are we back here? What exactly are you trying to prove? All I said that I’d expect a value to be expressed in Fahrenheit unless stated otherwise. I didn’t say that you should do that, or that’s somewhat objective. I was simply arguing that despite only ~4% of population using Fahrenheit, it has much more influence due to the listed factors.
There’s no need for that attitude though.
Fair, my bad! Sorry if it was offensive.
I just got a little sick of all the Fahrenheit (and also Imperial) domination around here. This, in turn, is often left without clarification, despite the system being way less popular.
Lemmy as a platform is extremely America-centric, despite having tons of folks from everywhere else, which is aggravating in the long run. World really, really doesn’t all revolve around land of the free.
Being from Russia, I’m fine with people using the units they are more confident with or used to.
(Not specifying units may be a bit confusing, but then people here don’t say\write “it’s 20 degrees Celsius” either.)
Russian-languaged media is not commonly consumed by someone living under imperial/Fahrenheit system, so it’s only natural.
For English, it might make sense to at least always add Celsius in parentheses, unless it’s highly regional news.
Also, привет российским леммиводам :D
Превед.
Metric ton of folks or colonial? Please clarify.
I agree though, that’s why I like posting conversions from time to time on other posts that are US defaults.
The attitude comes from Americans expecting the world circling around them.
The comment asked to list out the units which is a common thing to do. You don’t list out a scientific value without its units. They didn’t say list it out for Americans. Maybe the study was done in the US and they listed it in F. How would you know? So who came in here with an attitude?
No, they converted it to Fahrenheit because that’s what they use & expect to be clarified upon.
No, they first listed the units which is Celsius and then converted it themselves and didn’t excepted it to be converted. No one is complaining that it’s not in F but rather that the units are missing.
Or 53.6 degrees Fahrenheit if you believe whoever wrote the page for Nissan lmao. I guess they just typed it into a converter with no context, and the converter spat out an answer amounting to “if your thermometer says it’s 12 degrees C, that would be 53.6 degrees F”… but without that context.
How would you know it’s wrong if you don’t know fahrenheit
That’s why it’s a better choice to just clearly identify the units and not attempt to be clever about converting for a particular audience
Fair point, but I guess I would hope that the person being paid to write the copy would check it, since getting that right seems like it’s part of their job description ¯\_(ツ)_/¯
There probably wasn’t even anyone who actually wrote it. Fed it into some LLM to generate the page and no one actually edited it to make sure everything made sense
You’re right. Everything should be in degrees kelvin by default. Problem solved.
I will not stand for this! Rankine will be the standard! It will confuse and infuriate everyone equally. Truly the fairest of outcomes.
Kelvin and Celsius are the same scale with a different zero point anyway.
I totally agree
Why would it be anything else?
It’s clearly too low a number to be °K. And since the only two valid units of measurement for temperature are Kelvin and Celsius, it must be °C.
A differential temperature of 12C is equal to a differential temperature of 12K…… You don’t take the offset into account for differential temperatures.
What kind of garbage article doesn’t include the units!?
What for? Almost no country uses Fahrenheit.
If that’s how scientists did science, we’d have mountains of confusion. “Eh, most people will get it. Good enough.”
Information like this is global. It’s a single “C” for clarity. That’s not an unreasonable ask.
You need the ° or else you’re just making errybody mad. Or maybe that’s just me.
Maybe it’s a mental reading thing. I always “hear” the word “degrees” in my head when I see °, so I like the extra effort to include that, but I also know that colloquially, people are a lot lazier.
This is a news article, not a study, which would’ve more likely used Kelvin, which would be still 12 degrees. It’s for everyday people, which almost all of which use Celsius to measure temperature. People outside of the few countries who use Fahrenheit don’t get confused about it because it’s literally the only measurement they use in their life. If you travel outside the US you will find that no one adds Fahrenheit conversations anywhere and that pretty much all temperatures are listed in Celsius.
You’re arguing that it’s not worth the effort to be clear over a single letter, from a place of what appears to be some American-oriented xenophobia. Not a good look.
But to your point about travel, that isn’t analogous. This isn’t an American tourist going to another country, where the temperature context is Celsius. This is an article disseminated globally; by its very nature, the context should be agnostic of locale, and so it would behoove the authors to be clear (again, with a single letter) so that there is no confusion.
Calling out US entitlement isn’t xenophobia. That self applied victim complex is just proving my point.
This is an article disseminated globally
Anything on the internet is inherently accessible globally, unless there’s a geo-block in place. That does not mean that the things on the internet have to inherently be tailored to US standards or with US viewers in mind. The clearly not US sounding website “The Asahi Shimbun” even specifically has the subtitle “Asia & Japan Watch”, which should make it more than obvious that this is not a US focused media. The only confusion coming up here is when you have to assume US units being used everywhere else, which simply is not the case.
I’ve definitely seen some non-US news sources convert to US common units based on my locale. I’d much prefer they just clearly state what they’re using, especially like here where it’s just a matter of adding one character - similar to time where it’s adding three characters for the time zone.
It’s not even necessarily a US centric view asking for it - taking the high road here: anyone in the US interested in science is used to seeing both common and metric units. it’s really no big deal to switch back and forth. Just be aware there are multiple possibilities and indicate which you’re using.
Again, you’re quibbling about the letter C for the sake of clarity and calling that US entitlement. You’re welcome to die on that hill, but it seems like a silly one to die upon because you have some beef with Americans.
Again, you’re quibbling about the letter C for the sake of clarity
No, that’s what you are doing. lol I’m telling you that the letter is irrelevant for the majority of people in the world because we all already assuming the correct units of temperature and you seem to take an issue with that fact.
Windshield screens are the low-tech but far more effective method of keeping a car’s interior cooler, typically by at least 20F when it’s really hot out. Slightly inconvenient but unlike this paint, a windshield screen will actually make a difference.
Mythbusters did an experiment with a black car and a white car hitting in the sun. The black car was 12 degrees Celsius hotter. Claiming that the paint makes no difference is such a weird take. I thought this was common knowledge as well as many people I’ve met avoid darker colours in summer and such.
Summer was hard on me in my teenage goth years.
Can’t really get many light shades of black.
I think i’m in love.
What’s the cost (financial and environmental) of repainting a car vs using a windshield visor that’s at least twice as effective at reducing heat? Painting a car with this stuff would cost thousands of dollars compare to $20 for a visor.
I’m not talking about repainting anything, why are you moving the goalposts? Just buy a white car AND use a visor, what’s wrong with that? And in the future, if this stuff is actually good, maybe all cars can come already painted with it?
Speaking of huge and inconvenient, if you’re a cheapskate, just get a car cover. Always helped my motorcycle.
I bet the interior of your motorcycle was WAY cooler after that.
It was! Also, the exterior wasn’t too bad, either
I don’t care about your cage’s interior temperature. Until we can ban cars from cities I’d welcome such paint, because all those shit heaps of cages standing on public space still end up heating up the places around them, further inconveniencing everyone else even more.
Do they? I mean yes, because the ICE engines just constantly dump a ton of heat out, but does a parked car? Is there data on that?
Yes, just like “rock / gravel gardens” or whatever you call them in English, which are now banned in a lot of places for one reason being that exact same phenomenon of contributing to the urban heat island effect. They soak up the heat from the sun like a battery and then slowly release it into their environment, keeping it warm. It’s super obvious as a pedestrian.
You realize the emissions saved from reduced AC usage would also reduce the heat island effect, right? Sun visors like this are good for public spaces.
Also, it’s more environmentally friendly to have people use visors than repaint their whole car.
That still does not make me care about your cars interior temperature.
That’s okay, you seem pretty simpleminded so I don’t exactly expect you to understand the issue. I understand the anti-car sentiment but you’ve clearly gone off the deep end yet you still seem to think it matters to other people whether you care about issues like this.
That’s okay, you seem pretty simpleminded so I don’t exactly expect you to understand the issue.
Projecting much? Love the insults btw. Really drives your point forward.
I understand the anti-car sentiment but you’ve clearly gone off the deep end yet you still seem to think it matters to other people whether you care about issues like this.
You seem to care a lot. It’s also again projection and highly ironic since you were the one who apparently thought people care about your car’s interior temperature.
You seem to care a lot.
I think you’re confusing my care for the issue as me caring for you. It’s too bad you can’t even be bothered to make some of your comment relevant to the discussion.
Wanna know how you’re right? Look at the FLIR photo above and note where the heat is at its highest
Might be the most interesting thing Nissan has developed in two decades.
They found a very interesting way of selling their hybrid cars as full on EVs where I live. Their e-power stuff are small ICEs working as generators for electric motors that then drive the wheels. Apparently the fact that the wheels get all their power from an electric motor makes it definitely not a hybrid no sir, despite the fact the cars have tiny ass batteries and the single source of power for the whole system is the ICE. Also they somehow have worse fuel efficiency than many contemporary ICEs that cost quite a bit less. I don’t understand Nissan.
Where is this?
A few car companies seem to be doing that. Toyota(?) here are advertising their hybrid vehicles as “self-charging electric vehicles” instead of a hybrid, even though there’s no way to plug them in and not have them self charge.
can i paint my house with that?
There’s already a 98% paint, not that cheap last I checked though.
Nanoparticle roof shingles are a thing and they really work well
Is this revolutionary invention called white paint?
It’s staggering to me the number of black cars being sold in hot countries like Australia. Not to mention just how hard they are to see against the background of a bitumen road.
In some countries, you get a penalty on insurance depending on the car color, with maximum penalty reserved for black cars.
Everyone wants to be Mr Black.
How is it with silver and grey? Do you get a heavy penalty for them too? If it rains, snow and/or are foggy can it be very tricky to see silver and grey cars.
Heavy rain or snow all that matters is if the lights work!
Source: we get both around here
I’m not really sure. I think white and red are the cheapest.
Growing up I remember hearing that red cars were the most expensive for insurance, as owners of red cars had the highest incidence of speeding and dangerous driving.
Okay that’s racistLol. Wouldn’t want to see that applied to people although I can imagine the rhetoric.
Vantawhite
This is because the substance artificially reproduces a process known as radiative cooling on the painted surface. A typical example of radiative cooling is a phenomenon where the ground releases heat to cool off.
Nissan worked with the Chinese enterprise Radi-Cool as it specializes in the creation of radiative cooling technologies and materials.
(…)
However, one obstacle remains: the paint is six times thicker than the usual coating on the car body surface. The substance is also more expensive, which would add to the total cost of a new vehicle.
That, in turn, makes it difficult for the coating material to be utilized for mass-produced passenger automobiles.
For this reason, Nissan is looking to commercialize the paint on ambulances and other specialized vehicles as the first step.
However, one obstacle remains: the paint is six times thicker than the usual coating on the car body surface. The substance is also more expensive, which would add to the total cost of a new vehicle.
That, in turn, makes it difficult for the coating material to be utilized for mass-produced passenger automobiles.
With 6 times thicker paint there’s a chance it also wouldn’t rust like a proper Nissan and we can’t have that, now can we
Thicker paint so more chipping resistance? Where do I sign up? 😮
At the… Ugh idk. They all have super thin paint nowadays. Especially the more expensive brands.
…the paint is six times thicker than the usual coating on the car body surface… looking to commercialize the paint on ambulances and other specialized vehicles as the first step.
This is the best part of the article.
After driving ambulance during Australian summers, in the Great Victorian Desert, this would assist so much with operating temperatures. A literal life-saver, if the AC ever broke, also.
Veeerry reflective white paint. Probably not street legal
