A recent Science publication details how researchers at UCLA have developed a cooling device that could be used in energy-efficient wearable and portable cooling solutions. Using layers of nanotube-coated polymer films, the system continuously pumps heat away, lowering temperatures by up to 16°F (8.9°C) in its immediate surroundings and as much as 25°F (13.9°C) at the heat source in just 30 seconds.

Energy-Efficient Cooling

The device relies on the electrocaloric effect, where an electric field causes temperature changes in the material. Unlike traditional air conditioning, which consumes large amounts of energy and relies on refrigerants, this cooling technology operates purely with electricity. This means it could be powered by renewable energy sources such as solar panels, offering a sustainable alternative to conventional cooling methods.

The system comprises six ultra-thin polymer films stacked together, each layer coated with carbon nanotubes (CNTs). When the electric field is applied, the layers compress and expand in an accordion-like motion, actively pushing heat away. This self-regenerative mechanism makes it more efficient than traditional cooling methods like air conditioners.

Potential for Wearable and Portable Cooling

The efficient cooling device could be incorporated into wearable accessories for individuals working in extreme heat, offering a lightweight, efficient, and comfortable cooling solution. The technology could also be used to prevent electronic devices from overheating.

A Step Towards Sustainable Climate Control

With global temperatures continuing to rise, innovative cooling solutions are becoming increasingly important. By eliminating the need for refrigerants and integrating advanced materials into a compact, flexible design, this CNT-based cooling device represents a significant step forward in sustainable climate control.

To read the full study, click the link below. 

A self-regenerative heat pump based on a dual-functional relaxor ferroelectric polymer