Elastocalorics: Cooling Buildings With Metals That Stretch

Abstract

Elastocaloric technology is a new way to heat and cool spaces by using stretchy metals, called shape-memory alloys, instead of harmful refrigerant gases. When these metals are squeezed or stretched, they heat up; and when they relax, they cool down. This process is called the elastocaloric effect and it is more energy efficient than traditional cooling systems, making it a cleaner, greener alternative. Elastocaloric systems could cool homes, schools, and workplaces, and they could refrigerate food and medicine in areas with limited electricity. Researchers are also testing this technology for cooling and heating of electric vehicles, where it could help conserve battery life, and for heating buildings in colder climates. Despite its promise, elastocaloric technology faces challenges, such as improving the durability of materials and making the shape-memory alloys more affordable. With continued research, this technology could someday help to reduce greenhouse gas emissions, lower energy costs, and bring life-saving cooling to more people all over the world.