A research project which aims to harness the wasted solar energy absorbed by buildings has been launched by a consortium of 13 partners – including AkzoNobel.
The ENVISION initiative is going beyond the solar panels found on roofs in an attempt to harvest energy from all building surfaces (both transparent and opaque), without having to compromise on aesthetics.
A solution for absorbing near-infrared light (NIR) via special panels already exists, but these panels are only available in one colour – black. So AkzoNobel's coatings experts got to work and are developing technology which can capture heat using lighter and brighter colours. Dutch company BAM and research organization TNO are also partners in the project.
"Black facades aren't attractive to most people, so we've come up with an innovative solution which allows heat to be captured by colours that traditionally reflect NIR," explains Anthonie Stuiver, the AkzoNobel senior scientist who is working on the project.
He adds that the company is also looking to create different pigment effects, as well as the more familiar brick and wood patterns found on most houses. "It's a practical and sustainable solution for making buildings energy positive – and existing houses more climate-friendly – which also gives consumers freedom of colour choice," Stuiver continues.
The ENVISION project is part of Horizon 2020, the biggest ever EU research and innovation program. The project aims to demonstrate a full renovation concept which invisibly harvests energy from all available surfaces. The potential is huge, with an estimated 60 billion square meters of facade surface available to use throughout the EU.
"This is the first time that a concept of this kind has been developed," says Bart Erich, researcher and project coordinator from partner TNO. "Theoretically the concept is very simple. The challenge has been how to convert and store the energy so that it can be used efficiently."
AkzoNobel's focus on sustainable innovation has already produced several products that make buildings more climate-friendly. Many of these include KeepCool technology (used in exterior paints) which can reflect up to 85% more infrared radiation than comparable products – leading to significant energy savings related to air conditioning. The ENVISION project is designed to do exactly the opposite – absorb energy.
"Innovation is part of our DNA," adds Stuiver. "Projects such as ENVISION enable us to demonstrate our passion for paint and prove the depth of our expertise. We're proud to be involved."