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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.

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.

AA5B ,

Dammit, I needed 5.5 qt paint to cover one parking spot

Venator ,

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

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 ,

If you saw my other post, this is absolutely confirmed by data.

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.

ace_garp ,
@ace_garp@lemmy.world avatar

This is the t-shirt one I remember.

https://lemmy.world/pictrs/image/6859994e-f899-4fb1-b714-509481eb89ea.jpeg

From

mainichi.jp/english/articles/20230726/…/014000c

Snowcano ,

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

IsThisAnAI ,

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

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.

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

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

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

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

ace_garp ,
@ace_garp@lemmy.world avatar

Everyone wants to be Mr Black.

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? 😮

boonhet ,

At the… Ugh idk. They all have super thin paint nowadays. Especially the more expensive brands.

ace_garp ,
@ace_garp@lemmy.world avatar

…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.

Nomad ,

Veeerry reflective white paint. Probably not street legal

ace_garp ,
@ace_garp@lemmy.world avatar

That paint’s name…?

A mirror, the car is now mirrorball.

Halcyon ,
@Halcyon@discuss.tchncs.de avatar

Vantawhite

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

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…

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