Cooling and Heating with Solids
Eco-friendly cooling and heating technologies for microelectronics
Exhibitors
Location
Hall 11, Stand B06
Description
Microelectronic components are used in computers, smartphones, cars, medical testing equipment, and other devices. Depending on where they are used, they can heat up to over 80 degrees Celsius during operation and have to be cooled for optimal performance and service life. Their number is growing with technological progress. Until now, the increasing demand has been covered primarily by thermoelectric coolers that utilize the Peltier effect. In this process, a temperature difference is generated by applying direct current to numerous p- and n-doped pairs of semiconductor materials embedded between two ceramic plates. However, this method is not very energy-efficient due to its low cooling capacity and high power consumption. At the Institute for Microstructure Technology (IMT) at KIT, researchers at the ZEco Thermal Lab have developed a miniature cooling technology that doesn't need gaseous refrigerants that are harmful to the climate. It's based on the elastocaloric effect, where a temperature change occurs through the deformation of solid materials. ZEco uses a nickel-titanium shape memory alloy. When tensile stress is applied to the material by mechanical force, the atoms in the crystal lattice change their arrangement. This restructuring releases heat, which is conducted to the environment via a heat exchanger – in this case, a copper plate – and dissipated. When the stress is subsequently released, the material returns to its original shape and cools below its initial temperature. Contact with the relevant microelectronics achieves a cooling effect by absorbing heat. Repeating this charging and discharging cycle creates a continuous heat pump cycle that can function as a cooling and/or heating system.
You can get an overview of this technology at KIT stand. More details can be exchanged individually with the responsible scientific employees of KIT after the industry fair.
Contact
Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
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