Integrating phase change materials (PCMs) into the walls, ceilings, and floors of buildings can significantly reduce energy consumption for heating and cooling, according to research. These materials absorb and release thermal energy as they melt and solidify, helping to stabilize indoor temperatures.
A 2023 review in the journal Renewable and Sustainable Energy Reviews analyzed numerous studies and concluded that PCMs can reduce building energy consumption by 10-30%, depending on climate and integration methods. The technology is most effective when the PCM's phase change temperature is carefully matched to the desired indoor comfort range.
Common PCMs include paraffin waxes and salt hydrates, which are often encapsulated within construction materials like drywall, plaster, or concrete. By acting as a thermal battery, they store excess heat during the day and release it at night, reducing the load on HVAC systems.
While promising for improving energy efficiency in both new constructions and retrofits, challenges remain, including material cost, long-term stability, and the need for precise engineering to maximize performance in different climatic zones.
