Nissan develops paint that keeps cars cool in summer heat
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.
Is this revolutionary invention called white paint?
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
...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.
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.
Veeerry reflective white paint. Probably not street legal
Vantawhite
That paint's name...?
A mirror, the car is now mirrorball.
Nissan also detects you having sex in the car and phones the info home.
My wife's going to be pissed when she gets that call...
Nissan invents white paint
If it's like this stuff then it's more than just white paint.
Nasa have developed a paint for spacecraft that can be any color including black and still have the properties of white paint. It's only colored in the visible part of the spectrum but allows IR to pass right through.
Although you do need to paint the vehicle white initially as an undercoat.
Is it white paint?
And that’s 12 degrees Celsius (21.6 degrees Fahrenheit)! What kind of garbage article doesn’t include the units!?
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.
What kind of garbage article doesn’t include the units!?
What for? Almost no country uses Fahrenheit.
You’re right. Everything should be in degrees kelvin by default. Problem solved.
I agree clarification never hurts, but the entire world except for ~4% of highly entitled population will read that right.
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.
They're currently working hard for a way to make it subscription.
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?
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.)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.
They should install automated blinds like some high end luxury cars have except make them out of that silvery windscreen sunshade stuff.
I just love how humans will do anything other than actually focus on fixing the problem. Love it.
I would argue that the new paint could help alleviate the issue, since it would incentivise people to decrease use of the AC. My concern then would be how polluting is the production of the new paint compared to the current version.
My immediate thought was to wonder if this would help give kids who get left in a car by mistake have more of a fighting chance
Ah yes. Why reduce the temperature of your car by 12 degrees when you can just alter the entire planet instead.
Lol
Like reducing the number of cars.
Ohh too much traffic! 🤔 Let's expand the freeways until you need a freeway to cross other freeways.
Just one more lane will fix traffic bro
So... You want to turn off the sun? This has nothing to do with climate change, the sun hasn't changed intensity in a few 100 years, so sun makes things warm
Lol
You're right, running AC more off of internal combustion engines is a better path to the solution.
Lol
Twelve degrees what? A degree Celsius is more than twice a degree in Fahrenheit.
State your units, FFS.
I will assume celsius since the IR image shows around 45 and 35 degrees in direct sunlight.
1kg is more than twice 1lb (2.2lbs) but 1C is only 1.8F
And 1m is only 12 crayons.
The scientific consensus is that unless otherwise stated it's Celsius.
In scientific papers you just write 14° you don't need to specify the unit.
So I'm just going to use that rule and assume Celsius.
Forget Nissan but I'll take the paint.
Yeah but 350Z tho
I had a 370Z. Basically the same chassis with a bigger engine.
Feels like sitting in a bathtub. It's got a heavy ass flywheel that makes the V6 feel as smooth as a V8, but with predictable effects on responsiveness. You can cut the fly weight in half and it's still perfectly good to run on the street without issues.
I traded it in for an Miata NC and never looked back. Sure, the Z has more power, but it doesn't make good use of it the way a Miata does.
It's a cool, cool summer.
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.
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.
Where is this?
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
Neat.
Considering it's no an American brand I'd say Celsius
Didn’t know Nissan was Scottish
That typo reverses the meaning by being one letter off.
(It had said "diy cooking paint")Lol
wouldn't this also work on buildings? pavement?
No, only Nissans. It says right there.
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
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.
great video. Its wild that it is functioning as an IR emitter and just beaming things into space.
Is metal paint and concrete paint the same thing? I'm not a painter
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.
As someone living in Wisconsin with salty road winters, I'll say that Nissan's reputation is mostly trash here based specifically on their paint
As someone who used to live there, I'll say that Wisconsin's reputation is mostly trash based specifically on their winters
Also being the Alabama of the North.
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)
Why did you post a picture of an empty street?
I don't understand, why did you post a random picture of some pavement ?
🙄
Anything to not add a cooling system to the ev batteries.
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.
Wanna know how you're right? Look at the FLIR photo above and note where the heat is at its highest
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.
Grow up
Why don’t they just make the whole
planeplanet out of theblack boxpaint.can i paint my house with that?
Nanoparticle roof shingles are a thing and they really work well
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.
There's already a 98% paint, not that cheap last I checked though.
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12 degrees? I guess that's cool but still well within egg frying temperature around here.
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
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.
How big is the difference between black and silver, metallic and non-metallic paint?
It's surprisingly low. A German institute conducted a few experiments and the most extreme discrepancy was 1.5 degrees Celsius or something.
I'm sure those 28% loans will just tack on another 6k in paint. NBD.
There's no paint on the planet that will make most of their cars cool.
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
