31–40 of 41 posts
> "A raisin's worth of structural paint is enough to cover the front and back of a door," > Chanda uses a Boeing 747 as an example in his team's study. To cover these planes, approximately 500 kilograms of paint is needed. Chanda estimates that using structural paint, manufacturers could cover the plane with only 1.7 kilograms. Can someone explain how this will look like in real life? I have a hard time imagining pai…
Paint coatings can make a massive difference to temperatures in a home. People understand "black paint = hot", but that isn't even necessarily true, and there is far more to it. I believe building regulations should require specific performance from paint on new buildings, and that commercial painters be required to replace any paint on a 'same or better' basis. Performance would be measured on the basis of watts of…
Paint coatings can make a massive difference to temperatures in a home. People understand "black paint = hot", but that isn't even necessarily true, and there is far more to it. I believe building regulations should require specific performance from paint on new buildings, and that commercial painters be required to replace any paint on a 'same or better' basis. Performance would be measured on the basis of watts of…
I wonder if it makes sense to work these formulas by region. When people discuss that roofs need to be white I would think that only applies when cooling dominates energy use. It seems where heating is dominate should have black roofs.
Paint coatings can make a massive difference to temperatures in a home. People understand "black paint = hot", but that isn't even necessarily true, and there is far more to it. I believe building regulations should require specific performance from paint on new buildings, and that commercial painters be required to replace any paint on a 'same or better' basis. Performance would be measured on the basis of watts of…
I wonder if it makes sense to work these formulas by region. When people discuss that roofs need to be white I would think that only applies when cooling dominates energy use. It seems where heating is dominate should have black roofs.
Paint coatings can make a massive difference to temperatures in a home. People understand "black paint = hot", but that isn't even necessarily true, and there is far more to it. I believe building regulations should require specific performance from paint on new buildings, and that commercial painters be required to replace any paint on a 'same or better' basis. Performance would be measured on the basis of watts of…
I wonder if it makes sense to work these formulas by region. When people discuss that roofs need to be white I would think that only applies when cooling dominates energy use. It seems where heating is dominate should have black roofs.
>> choose a coating to minimize energy use for the building in whatever climate surrounds it
Earlier quoted context omitted.
I wonder if it makes sense to work these formulas by region. When people discuss that roofs need to be white I would think that only applies when cooling dominates energy use. It seems where heating is dominate should have black roofs.
I think the person you replied to knows that, hence why they said >> choose a coating to minimize energy use for the building in whatever climate surrounds it
Earlier quoted context omitted.
I wonder if it makes sense to work these formulas by region. When people discuss that roofs need to be white I would think that only applies when cooling dominates energy use. It seems where heating is dominate should have black roofs.
Slightly warmer attic in winter doesn't reduce heat loss significantly, but in summer the roof temperature increase is much greater than winter, does measurably increase cooling load in insufficiently insulated houses, and, in aggregate, causes the Urban Heat Island Effect along with road surfaces.
Earlier quoted context omitted.
I wonder if it makes sense to work these formulas by region. When people discuss that roofs need to be white I would think that only applies when cooling dominates energy use. It seems where heating is dominate should have black roofs.
While I agree, often times the places that need the most heat are those with snow. So it may still be better to optimize for cooling in many cases.
What coatings should be used for roof and exterior walls for a well insulated building in in the mid forties latitude.
Snow has some insulating value so the heatloss is reduced. A highly absorbent roof might still be a plus. I'm currently trying to figure out the if I can put a thin layer of phase change material PCM on my exterior walls. The idea would be that the phase change would delay the reaction of the heat transmission through the walls. The building has a high thermal mass and it takes about 72 hours of a 15+ degree temperature difference to result in 4 degree temperature change of the interior of the building. Modern commercial buildings can't use open windows for ventilation. The ventilation has to be provided by a mechanical system. I'm trying to optimize the building to maintain a consistent overall temperature range of 72-78 degrees. The summer is not a problem the heat pumps and solar array mean I only get 5 electric bills a year. I think that I can do a lot of optimization of coatings and solar thermal to get to net zero.
Ah, so this will never come to a home near you. Shame.