A Heat Switch for Controlling Heat Flow Path in Electronic Systems




A switch is a fundamental part of most electrical and mechanical devices; mechanical switches can be used to select gears in a car’s transmission or used to unlock a door; electrical switches can turn the lights in a room on and off;  semiconductor uses to route logic signals within a circuit or control bigger devices. But what about heat flows? Can we possibly control the route of heat in a device? A Thermal Switch? Well, a thermal switch is an electromechanical device which opens and closes contacts to control the flow of electrical current in response to temperature change. A Thermal switch controls the flow of current concerning the temperature change, but this doesn’t actually control the flow of heat.

A Heat Switch for Controlling Heat Flow Path in Electronic Systems




Heat flow is very important to engineers, and the heat movement in a device can profoundly affect the system performance and reliability especially in an electronics system. Engineers have long desired a switch to control heat flows, but many challenges exist in the creation of such a switch. Researchers from the College of Engineering at the University of Illinois at Urbana-Champaign have developed a new technology that allows users to turn heat flows “on” or “off.” This is a great development and it’s going to impact on future electronics systems.

Heat flows occurs whenever you have a region on higher temperature near a region of lower temperature. In order to control the heat flow, the team engineered a specific heat flow path between the hot region and cold region and then created a way to break the heat flow path when desired” claims William King, the project co-leader and a professor at the department of mechanical science and engineering.

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