Evaluating Calcium Carbonate Microsphere Incorporated Self-Cooling Paint for Surface Temperature Reduction and Energy Conservation in Building Structures

Abstract

The phenomenon of urban heat islands, whereby energy demands are higher in dense cities experiencing rapid growth and climate change, is intensifying. The study is based on developing a passive self-cooling paint for the buildings to lower surface temperatures significantly, which would result in reducing energy consumption associated with air conditioning. Its primary aim is to create a calcium carbonate microsphere-incorporated paint with substantially higher solar reflectance and thermal emissivity performance towards passive radiant heat. We expect this to reduce the amount of energy needed for cooling buildings, lowering overall greenhouse gas emissions; by devising paints that better reflect sunlight and can cool below ambient temperatures with roof-level drops in temperature between 3°-6°C. Our new technique involves fabricating the paint from calcium carbonate microspheres made via chemical precipitation and mixed with an acrylic base. For real-world application and effectiveness evaluation, we have conducted tests on solar reflectance, thermal emissivity, and durability across different environmental conditions. Field tests will start by evaluating the paint as a cooling agent for various types of surfaces, including concrete and metal, frequently used in urban structures. This innovation aligns with sustainable urban development priorities and reduces reliance on fossil fuel-based cooling techniques. The paint has the potential to present a practical solution that helps reduce climate change impacts and enhances both new and retrofitted city environments to counteract urban heat islands and support low-energy-use buildings. This technology has broad applicability and could be transformative for broader sustainability goals, promising massive energy savings and reduced carbon footprints in urban settings.