A recent study published in the Journal of Energy Storage introduces a novel bio-composite phase change material (BPCM) using biochar derived from tea industry waste and coconut oil. The research, led by Zeenat Arman and colleagues, explores the potential of this eco-friendly material for thermal energy storage (TES) in buildings, addressing the growing demand for sustainable energy solutions.

The biochar, produced from tea waste through thermochemical conversion, serves as a supporting matrix for the phase change material. This matrix is infused with a blend of Cocos nucifera oil (coconut oil) and a paraffin-based phase change material (OM35). The resulting BPCM demonstrates impressive thermal stability and resilience, making it a viable option for TES systems.

Among the tested formulations, a mixture containing 70% OM35 and 30% coconut oil exhibited the highest thermal performance, with a latent heat of 150.5 J/g. The thermal conductivity of this composite was also improved by 6.6% to 27%, compared to composites made from individual components.

This research highlights the potential of using waste biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More like tea waste to create form-stable, sustainable materials for thermal management in buildings. By reducing energy consumption and enhancing thermal comfort, these BPCMs could play a key role in addressing global energy challenges, while supporting waste-to-wealth initiatives.