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Nissan develops paint that keeps cars cool in summer heat

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.

daddy32 ,

Nissan also detects you having sex in the car and phones the info home.

ABCDE ,

What ahaha.

mbtrhcs ,

Their privacy policy includes a provision that they can use the cameras and GPS to infer things such as sexual orientation, so yeah.

fern ,

While this fucked up, documenting sexual orientation is not exactly recording sex. Someone could simply use GPS and see that the only place in the area that’s open is the gay bar and infer from that, or even lip reading.

AcesFullOfKings ,

Someone could simply use GPS and see that the only place in the area that’s open is the gay bar and infer from that, or even lip reading.

xkcd.com/1425/

SomethingBurger ,

github.com/colinsauze/xkcd1425-with-yolo

peopleproblems ,

You know, we can use vision ai services to do that now, dang yo time flies

AcesFullOfKings ,

so you’re suggesting that it’s feasible to use a video stream from the car to read lips by, what, paying out of pocket to send the video stream over the built-in cellular? Possible, sure. Then receiving it at a datacentre and running one of the most computationally intensive algorithms in existence on the video stream, 24/7? Or at least only when I’m using the car? so the datacentre is processing presumably tens or hundreds of thousands of these all at once, so at let’s say 5mbps per video that could easily be multiple terrabits per second of bandwidth, consuming megawatts of power in order to spy on people in probably the least efficient and most expensive way imaginable, and all to determine that I said I like coke rather than pepsi so the car company can receive $0.01 in selling that to some ad company?

Is that scenario possible? Yes. Is it happening? I am certain that it’s not in any rational company. The same line of reasoning applies to listening to your phone’s microphone or camera, except there you’d also notice your phone getting hot and the battery dying in an hour or two.

The GPS thing is feasible. I don’t know if they’re doing that but they could. As soon as you mention transmitting video feeds or cloud AI you’re in conspiracy territory.

||Now, Tesla’s on-device AI processing using the driver’s power bill to analyse video on-site and only send the tiny results into the cloud… is very different. ||

peopleproblems ,

no.

teft ,
@teft@lemmy.world avatar

Not a hot dog bird

daddy32 ,

“Sexual activity”, too. Source: …mozilla.org/…/its-official-cars-are-the-worst-pr…

ABCDE ,

Which cameras?

mbtrhcs ,

I don’t think they have interior cameras (although other manufacturers do), but the front and backup camera feeds provide plenty of information as well.

Then there’s also this, if you need any more reason to be concerned.

ABCDE ,

I don’t think they have interior cameras

Can just stop there. Unless people are banging on the bonnet, not sure what the point is.

mbtrhcs ,

If you read the linked article you will find that exterior cameras feeds are plenty invasive enough.

ABCDE ,

I don’t disagree, but this is what was said:

Nissan also detects you having sex in the car

Unless there are cameras in the car then no.

ChairmanMeow ,
@ChairmanMeow@programming.dev avatar

There are enough sensors in cars to detect a rythmic motion. It doesn’t need cameras for that.

fin ,

I’m curious where that’s from? News, or you made up from privacy policy?

daddy32 ,

Mozilla’s analysis if the policies, see my other comment in the thread.

fin ,

Okay, I found one.

…mozilla.org/…/its-official-cars-are-the-worst-pr…

But I guess it’s to clarify what kind of data could possibly be collected and not that they actively collect and use them. I guess Ford can do that too, although they don’t specify in their privacy policy.

They’re not interested in your sexual orientation.

mihnt ,

So fucking glad I got my car before they added all this shit.

It’s going to prevent me from getting any EVs that come out that I can afford too. I’m not signing a fucking privacy policy for a car.

fin ,

Yeah, EVs are the worst kind of the privacy-invasive cars I agree

Silentiea ,
@Silentiea@lemmy.blahaj.zone avatar

But, like, why is that listed then? Why would Kia and Nissan say they collect information on your “sex life” and “sexual activity” respectively of they’re not? What’s to gain from keeping the window open if you’re using it?

RagingSnarkasm ,

My wife’s going to be pissed when she gets that call…

kusivittula ,

can i paint my house with that?

ABCDE ,

There’s already a 98% paint, not that cheap last I checked though.

collapse_already ,

I have a similar coating on my deck in the back yard. I can stand on it barefoot comfortably in the summer which is not possible without the coating.

Pretzilla ,

Nanoparticle roof shingles are a thing and they really work well

radiohead37 ,

Is this revolutionary invention called white paint?

vk6flab ,
@vk6flab@lemmy.radio avatar

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.

daddy32 ,

In some countries, you get a penalty on insurance depending on the car color, with maximum penalty reserved for black cars.

xavier666 ,

Okay that’s racist

daddy32 ,

Lol. Wouldn’t want to see that applied to people although I can imagine the rhetoric.

Kuma ,
@Kuma@lemmy.world avatar

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.

daddy32 ,

I’m not really sure. I think white and red are the cheapest.

rottingleaf ,

Red is the cheapest? It’s also a rather nice color, no?

White is fine too.

boatswain ,

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.

Kecessa ,

Heavy rain or snow all that matters is if the lights work!

Source: we get both around here

14th_cylon ,

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.

boonhet ,

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

Kecessa ,

Thicker paint so more chipping resistance? Where do I sign up? 😮

Nomad ,

Veeerry reflective white paint. Probably not street legal

MTK , (edited )

diy cooling paint

davidgro , (edited )

That typo reverses the meaning by being one letter off.
(It had said “diy cooking paint”)

MTK ,

Lol

finley ,

https://lemm.ee/pictrs/image/4d2bf74d-d0af-4c1b-8a80-469a8c196cfd.jpeg

Yeah, I know it’s an NSX. Deal with it.

TheGrandNagus ,

What is the relevance here?

finley ,

If you ever had balls, you’d know

IsThisAnAI ,

JDM internet tough guy shit 🤣

TheGrandNagus ,

Again, what does a somewhat overrated 90s Honda have to do with Nissan’s paint options? And what’s with the tacky body kit?

sleepmode , (edited )

Especially since it was largely a failure in the racing series it competed which at the time was dominated for years by Nissan.

asbestos ,
@asbestos@lemmy.world avatar

cringe

Summzashi ,

Weird

hannesh93 ,
@hannesh93@feddit.org avatar

Also great for city climate since heated up cars are acting like a heat battery making it significantly slower for a city to cool down once the sun goes away

Ideally there would be no openly parked cars but I guess this is the next best thing

Zwiebel ,

How big is the difference between black and silver, metallic and non-metallic paint?

Dungrad ,
@Dungrad@feddit.org avatar

It’s surprisingly low. A German institute conducted a few experiments and the most extreme discrepancy was 1.5 degrees Celsius or something.

IsThisAnAI ,

I’m sure those 28% loans will just tack on another 6k in paint. NBD.

Snowcano ,

Why don’t they just make the whole plane planet out of the black box paint.

Buffalox ,

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.

Ferris ,

trick is to paint the windows

Buffalox ,

Also this is problematic:

12 degrees cooler

But by what scale? If it’s Flaffenfeit, it’s just half an ounce!!!

espentan ,

And an ounce is nowhere close to a decimeter!

Buffalox ,

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.

radiohead37 ,

A bushel of paint should be enough to cover 12 roods.

DancingBear ,

Our European friends are going to need you to convert that to kilometers.

Venator ,

They should install automated blinds like some high end luxury cars have except make them out of that silvery windscreen sunshade stuff.

Venator ,

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…

BallShapedMan ,
@BallShapedMan@lemmy.world avatar

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?

Kualk ,

Is ceramic tint different from ordinary tint?

model_tar_gz ,

Yes. It contains ceramic nano particles that reflect UV without interfering with visibility.

nyctre ,

Could you link one of these? All the ones that I can find say there’s quite a bit of a difference

Buffalox , (edited )

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.

Silentiea ,
@Silentiea@lemmy.blahaj.zone avatar

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.

Buffalox , (edited )

OK I’ll link the danish test, this test is done with 2 cars that are identical, except for the color of the paint:

…tv2.dk/2018-05-24-bliver-en-sort-bil-varmere-i-s…

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.)

nyctre ,

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.

remer ,

And that’s 12 degrees Celsius (21.6 degrees Fahrenheit)! What kind of garbage article doesn’t include the units!?

MHLoppy ,
@MHLoppy@fedia.io avatar

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.

ILikeBoobies ,

How would you know it’s wrong if you don’t know fahrenheit

MHLoppy ,
@MHLoppy@fedia.io avatar

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)_/¯

BakerBagel ,

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

Allero ,

I agree clarification never hurts, but the entire world except for ~4% of highly entitled population will read that right.

IamAnonymous ,

There’s no need for that attitude though.

Allero ,

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.

rottingleaf ,

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.)

Allero ,

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 русским леммиводам :D

rottingleaf ,

Превед.

Allero ,

😂

Zip2 ,

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.

DarkThoughts ,

The attitude comes from Americans expecting the world circling around them.

IamAnonymous ,

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?

DarkThoughts ,

No, they converted it to Fahrenheit because that's what they use & expect to be clarified upon.

cheddar ,
@cheddar@programming.dev avatar

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.

Allero ,

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!

cheddar ,
@cheddar@programming.dev avatar

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.

Allero ,

“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.

cheddar ,
@cheddar@programming.dev avatar

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.

DarkThoughts ,

What kind of garbage article doesn’t include the units!?

What for? Almost no country uses Fahrenheit.

Telorand ,

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.

Silentiea ,
@Silentiea@lemmy.blahaj.zone avatar

You need the ° or else your just making errybody mad

Telorand ,

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.

DarkThoughts ,

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.

Telorand ,

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.

DarkThoughts ,

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.

Telorand ,

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.

DarkThoughts ,

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.

Telorand ,

Me: “We should be clear and add a C, so we know for sure what units we’re dealing with and don’t make assumptions.”

You: “No, that’s American-centrism! We don’t need to include them! Most of the world already knows what they mean!”

Zip2 ,

You’re right. Everything should be in degrees kelvin by default. Problem solved.

remer ,

I totally agree

MerchantsOfMisery ,

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.

nyctre ,

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.

Telorand ,

Speaking of huge and inconvenient, if you’re a cheapskate, just get a car cover. Always helped my motorcycle.

Silentiea ,
@Silentiea@lemmy.blahaj.zone avatar

I bet the interior of your motorcycle was WAY cooler after that.

Telorand ,

It was! Also, the exterior wasn’t too bad, either

IndiBrony ,
@IndiBrony@lemmy.world avatar

Summer was hard on me in my teenage goth years.

Can’t really get many light shades of black.

Silentiea ,
@Silentiea@lemmy.blahaj.zone avatar

https://lemmy.blahaj.zone/pictrs/image/d1f495eb-5066-435d-9ed9-5912e573cbda.webp

MerchantsOfMisery ,

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.

nyctre ,

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?

DarkThoughts ,

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.

Silentiea ,
@Silentiea@lemmy.blahaj.zone avatar

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?

DarkThoughts ,

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.

MerchantsOfMisery ,

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.

DarkThoughts ,

That still does not make me care about your cars interior temperature.

MerchantsOfMisery ,

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.

DarkThoughts ,

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.

AgentGrimstone ,

Neat. Now paint the inside.

Fedizen ,

so it radiates heat into the vehicle?

user1234 ,

There’s no paint on the planet that will make most of their cars cool.

XeroxCool ,

Yeah, the Leaf doesn’t need any help being cool*, they’re as neat as they come

*just don’t mention gen 1 air-cooled battery pack degradation

LaunchesKayaks ,
@LaunchesKayaks@lemmy.world avatar

Got in my car after work yesterday and it was 102F inside. It was awful

terminhell ,

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.

LaunchesKayaks ,
@LaunchesKayaks@lemmy.world avatar

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.

skulblaka ,
@skulblaka@sh.itjust.works avatar

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.

LaunchesKayaks ,
@LaunchesKayaks@lemmy.world avatar

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

Syd ,

Must have had you wishing for a nuclear winter.

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