newly invented white paint is so white it reflects the suns energy, no need for air conditioners on new houses

[Space Lynx]

I mean, its a nifty idea that they made a white paint that's even more reflective. We already saw an experiment like this repainting streets in I believe LA (I am sure it was California, just not sure if LA) and this caused a significant reduction in nearby temperatures including needs for A/C to run in houses during summer. I mean logically lighter colors absorb less heat than darker colors so it would help reduce temperatures in homes.

Anyways, problem with this idea is what are the effects of doing this on a grand scale or even just a single neighborhood? What about keeping it clean, will that require significant time and investment to keep these structures clean for it to work better? How about making it (Based on responses, its hard)? How long does it last? All these things have to be considered and more. Truth be told, I think a lot of people would be smarter just doing very light grays/whites on houses and roofs to reduce temperatures in homes alone. There are always alot more cost to ideas like this that are supposed to help the "climate crisis" than shown.

However, once I again I think its pretty cool!

I mean every day I go to work I see people lined up at expensive car washes with their giant SUV's, even though said SUV is spotless clean already (they seem to have some weird addiction I don't know), so I mean their waste is far less than a power washer rinsing a roof off for 15 minutes... it takes what 5 minutes to get ladder out of garage, 5 more to hook it all up, no need to get on roof cause its a power washer... should be done in 15 tops, maybe 20 if you have a big roof and need to move ladder around house.

So clean is easy imo.

Doesn't matter to me about climate crisis, but my energy bill in summer would go down that's for sure.

 

[Caring1]

Why not just use reflective road marking paint on homes?
I've seen it done once on a reno show where they used it, but the application is harder due to it being denser.

 

[Vario]

The solution is reduction in carbon emissions. Everything else is bullshit.

 

[GhostRyder]

I mean every day I go to work I see people lined up at expensive car washes with their giant SUV's, even though said SUV is spotless clean already (they seem to have some weird addiction I don't know), so I mean their waste is far less than a power washer rinsing a roof off for 15 minutes... it takes what 5 minutes to get ladder out of garage, 5 more to hook it all up, no need to get on roof cause its a power washer... should be done in 15 tops, maybe 20 if you have a big roof and need to move ladder around house.

So clean is easy imo.

Doesn't matter to me about climate crisis, but my energy bill in summer would go down that's for sure.

My point is how often and how does it degrade with dirt over time and how often. Plus in that analogy they are paying someone to wash their car not do it themselves (Which is a lost art, I like hand washing my truck). Plus I am not sure how many people have power washers (I mean I do and my whole family each has one, but many of my neighbors dont). But my point was its just a few things on a list to think about before it would be implemented. Plus I agree, I am all for lowering energy bills.

The solution is reduction in carbon emissions. Everything else is bullshit.

I mean sure, but thats only if it actually does in a significant way. The mining of the materials needed to make this paint has to be taken into account. Might be better just to use conventional paint. This is similar in a way to the electric car argument.

Why not just use reflective road marking paint on homes?
I've seen it done once on a reno show where they used it, but the application is harder due to it being denser.

Oh really, had not seen that one. I have only seen the one where they painted an entire street white. It worked great but had to be maintained a lot more than normal from what I saw but still was a marked improvement.

 

[Space Lynx]

My point is how often and how does it degrade with dirt over time and how often.

fair point, I didn't realize that is what you meant until just now. that makes sense, you are correct in your original premise, that a lot of times stuff like this has an issue of some kind or other once it finally reaches production phase.

 

[AlwaysHope]

I painted most of my house exterior & interior walls, ceilings & roof with nano tech paint a few yrs ago. I swear there was an improvement in passive thermal conditions inside the house but don't know if this is a placebo effect or not on my part?

 

[ThaiTaffy]

I painted most of my house exterior & interior walls, ceilings & roof with nano tech paint a few yrs ago. I swear there was an improvement in passive thermal conditions inside the house but don't know if this is a placebo effect or not on my part?

Were due to paint the house soon but I might wait a little longer till I have a base data set from the internal sensors around the house, I fitted for my home automation.
They haven't been running long enough to be valid data and it's not really a good comparison untill they have recorded a summer so if I put it off till after, I could theoretically give a actual comparison on nano tech Vs regular light opaque.

 

[looniam]

I painted most of my house exterior & interior walls, ceilings & roof with nano tech paint a few yrs ago. I swear there was an improvement in passive thermal conditions inside the house but don't know if this is a placebo effect or not on my part?

paint can be a good sealant. even better if you go along and patch any cracks or what not while painting .

 

[AlwaysHope]

paint can be a good sealant. even better if you go along and patch any cracks or what not while painting .

Yes, that's what I thought too. I did get fussy sealing even the smallest hairline cracks between say the skirting board & the wall panels for example with top grade sealant first. I also put a quality undercoat/sealer on prior to the nano paint application. Even thought the nano paint does say it has built in primer, I wanted to be sure it was a top job to last ultra long term.
I live in a climate that can get down to -3 to 4 below & up to mid 30s C throughout the year, also the humidity can fluctuate quite dramatically too. This in turn puts a lot of stress on the building material for contraction & expansion within its physical properties.

 

[watzupken]

If you can reflect heat/light away from your home, it will help to reduce heat for sure. The walls for instance will not feel that warm under the baking sun, thus, your A/C may not need to work as hard. But to eliminate the need for A/C, I doubt it is possible. Whilst the building may be reflecting heat, all around us, heat is getting absorb, e.g. roads, soil, etc... So if your ambient temps is high, the air will also be warm. In short, I will take whatever claims being made about this paint mostly just marketing talk.

 

[AlwaysHope]

If you can reflect heat/light away from your home, it will help to reduce heat for sure. The walls for instance will not feel that warm under the baking sun, thus, your A/C may not need to work as hard. But to eliminate the need for A/C, I doubt it is possible. Whilst the building may be reflecting heat, all around us, heat is getting absorb, e.g. roads, soil, etc... So if your ambient temps is high, the air will also be warm. In short, I will take whatever claims being made about this paint mostly just marketing talk.

The design of the building in the first place is a deal breaker here before anything else should be taken into consideration. Generally speaking, in warm to hot climates, at least in the southern hemisphere, south facing buildings will be cooler by default. Obviously the opposite will be true for northern hemisphere places. Also what materials is the structure made off? brick & stone have the best thermal properties & then its in descending scale from there on. Plenty of links out there discuss this aspect in more depth.

 

[Space Lynx]

World’s whitest paint now thinner than ever, ideal for vehicles

The world’s whitest paint, developed at Purdue University, is now thinner and lighter than ever before.

www.purdue.edu

“Using this paint will help cool surfaces and greatly reduce the need for air conditioning,” Ruan said. “This not only saves money, but it reduces energy usage, which in turn reduces greenhouse gas emissions. And unlike other cooling methods, this paint radiates all the heat into deep space, which also directly cools down our planet. It’s pretty amazing that a paint can do all that.”

I wonder how much energy usage this paint could save if every sunny area started using it... very interesting.

this paint is apparently in mass production now. also, its been made super thin, I believe through this process though I am not 100% sure:

Scientists accidentally create the world's lightest paint by mimicking Mother Nature

Take a peacock feather, for example. Submicroscopic ridges and contours in a peacock feather diffract light to create the iridescent blues and greens we see. This natural...

www.techspot.com

I am going to paint my house with it to reduce electricity costs in summer months, assuming it gets approved for vinyl use and isn't too expensive.

 

[lemonadesoda]

I spend more money on heating than on cooling. Got any black paint?

 

[Space Lynx]

I spend more money on heating than on cooling. Got any black paint?

The airline industry, the entirety of the Middle East, southwest USA, and anywhere near the equator could benefit from this immensely.

 

[Shrek]

Anyone now if the paint is durable?

 

[Steevo]

I spend more money on heating than on cooling. Got any black paint?

My excess heat makes hot water. Getting ready to install a black metal roof.

 

[Space Lynx]

Anyone now if the paint is durable?

the airline industry, roofers, major corporations that make paint have already contacted Purdue to buy it from what I understand, they would not be doing so if it was not durable.

My excess heat makes hot water. Getting ready to install a black metal roof.

yeah if you live in cold climates this thread probably isn't for you.

 

[Space Lynx]

mass production is about 1 year away according to this July 2023 article. might paint our roof with it if it doesn't look too funky, will test it out on the shed roof first. if it doesn't look good, will just paint the siding with it and leave the roof alone.

To Help Cool a Hot Planet, the Whitest of White Coats (Published 2023)

Scientists at Purdue have created a white paint that, when applied, can reduce the surface temperature on a roof and cool the building beneath it.

www.nytimes.com

 

[izy]

This is great if your house is near an airport

 

[Space Lynx]

another interesting concept for houses besides this white paint

Mercedes is working on "solar paint" that could drastically reduce the need for charging

The company states that this groundbreaking solar paint is just five micrometers thick and weighs a mere 50 grams per square meter – practically weightless. Despite its...

www.techspot.com

might be really good for areas like Nevada/Arizona, or middle east countries that get a lot of sun.

I wonder if they can make it resistant to "low level" powerwashing, because then you would just do a quick sweep once a week to clear off the dust those regions typically produce.

 

[lilhasselhoffer]

Zombie thread, kill it with fire.

Funny to see some of these hot takes. It's a glimpse at what people felt when unfiltered...and it's a time capsule showing that ignorance is really fantastic. My favorite is the assumption of an 18 degree difference in air temperature being entirely equatable to an 18 degree difference in water temperature, so a near freezing water mass should somehow be able to freeze solid. It's amazing how many people forget early high school and late middle school physics. Namely that each phase transition requires orders of magnitude more energy than and individual change in temperature. IE, the amount of energy to turn liquid water from 80-90 C is not the same as steam from 110-120 C, and the transition from liquid 100 C water to vapor 100C is silly high. We're talking 41,000 joules to heat 10 degrees, but 2,256,000 to phase transition.


Also funny to see that black body radiation is still a thing rarely understood.
Also funny to know they had to install diffusers on a building because they basically created an accumulator dish on a building that functioned like a fresnel lense...and we still haven't learned better.

 

[trieste15]

LOL, this won't totally fly in Vermont, New Hampshire, Massachusetts and Maine! Especially with how chilly it's been.

We have 4 seasons, unlike the deep-south!

Indiana also has much the same kind of weather as we do.

The white will also serve to minimise radiation of heat out of the house, assuming thermal radiation is the major driver of heat loss from that house.

 

[onemanhitsquad]

The world has been around for more than 3 billion years...the world will be here for billons more.

 

[Space Lynx]

The world has been around for more than 3 billion years...the world will be here for billons more.

I literally have no idea what this has to do with anything regarding this thread.

Reduce electricity usage = saves the owner of their house in Arizona money? Just for example.