MIT has developed a system that can store thermal energy for hours

Researchers at the Massachusetts Institute of Technology (MIT) invented a battery-like system that stores heat and releases heat when needed. The key to this system is to use a phase change material (PCM). When exposed to high temperatures, this material will store energy in liquid form. When cooled enough to return to the solid state, energy is released.

In general, the biggest drawback of PCM is that it requires a large amount of insulating material to maintain energy and cannot control the speed of returning to the solid state. To solve these problems, MIT researchers combined their PCM and molecular switches to change shape when exposed to light.

After ultraviolet light is applied to the material, it is still in a liquid state even without heat. The second light will make this compound solid again, releasing energy. MIT Postdoctoral Grace Han explained at the press conference: “What we are doing technically is to install a new energy barrier so that the stored heat cannot be released immediately.”

This system can store about 200 Joules of energy per gram and can withstand temperature changes of 10 degrees Celsius. It can maintain 10 hours of heat, which is a big improvement over current standards. The creators of the system expect that the system will be further refined with continued research and development.

The system designed by the MIT team for storing heat energy has many potential uses. Ultimately, this technology can provide solutions for people in developing countries that do not have traditional power grids. This system not only absorbs the heat of the sun, but also uses waste energy from industrial processes. This means that it can absorb heat from heavy machinery and then release it to heat up.

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