Evercool Specification
High IR reflective paint makes the room more cooler thus consume less energy.
The special selected pigment inside the paint formula play the main role, those pigment reflects the UV & the IR. So make the environment under the roofing more cooler compared the normal polyester product.
Radiation and Thermal Control Solar radiation falls at varying intensities across a range of wave lengths
About 5% of solar energy that hits the earth does so as destructive UV light - this means that coatings need that as transparent as possible to UV.
Around 45% of solar energy falls as visible light and is absorbed or reflected by the coating.
We see the reflected light as the color and brightness of the surface.
Approximately 50% of solar energy is in the near infrared region.
This, too, is partially reflected or absorbed. The absorbed energy heats the coating which then re-emits part of this energy in the longer wave length thermal infrared.
The remainder is conducted into the body of the roof.
Energy from the Sun
Heat Transfer Mechanisms
This is what happens when solar radiation hits a roof on a hot day
Solar energy which is not reflected, re-emitted or carried away by convection currents is conducted into the interior surface.
If absorbed heat is not re-emitted efficiently externally, the roof temperature rises so that more heat is transmitted internally and conducted through to the interior surface.
The interior organic coating will behave like the exterior coating when the conducted energy from the outside meets it. The coating will first absorb the energy and then re-emit it into the inside of the room as energy in the thermal or mid infrared region.
The greater the heat flux into the interior, the harder air conditioning must work to maintain a steady temperature.
Project Drives
Benefits to Building Owners
- Reduce air conditioning usage and costs
- Reduce fuel heating consumption & costs
- Improve thermal comfort
- Reduce insulation requirements
- Enable qualification for tax credits and rebates
Benefits to Environment
- Lessen peak loads on energy producers
- Reduce "Heat Island" effect / Global Warming
- Reduce consumption of fossil fuels
- Improve durability & product lifetimes
Shanghai Model Building Performance
Location : Becker Industrial Coatings Shanghai
Construction : Butler Building Systems
Commenced testing : October 2005
