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Development of thermal switches based on shape memory alloy actuators

Entwicklung thermischer Schalter auf Basis von Formgedächtnislegierungen
: Voigt, Immanuel; Drossel, Welf-Guntram; Eppler, Christoph; Pagel, Kenny; Bucht, Andre


American Society of Mechanical Engineers -ASME-; American Society of Mechanical Engineers -ASME-, Aerospace Division:
ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems 2018. Vol.1: Development and Characterization of Multifunctional Materials; Modeling, Simulation, and Control of Adaptive Systems; Integrated System Design and Implementation : San Antonio, Texas, USA, September 10-12, 2018
New York/NY.: ASME, 2018
ISBN: 978-0-7918-5194-4
Paper SMASIS2018-8263, 6 S.
Conference on Smart Materials, Adaptive Structures and Intelligent Systems <2018, San Antonio/Tex.>
Fraunhofer IWU ()
thermal switch; shape memory alloy; phase change material; heat storage; heat pipe

In machine tool engineering, the impact of thermal issues on machine precision and efficiency has been outlined in numerous studies. One of the major challenges is the energy-efficient distribution of heat within the machine structure. In order to control occurring heat fluxes without additional energy input into the machine tool, smart materials can be used for load-dependent adjustment of heat transfer characteristics. The present study illustrates the development and examination of heat transfer switch mechanisms using shape memory alloys. Experimental and numerical results demonstrate how different types of actuators can be used to enable an energy self-sufficient thermal switch function between heat source and heat sink. Different scenarios are considered and the combination of thermal switches with highly conductive heat-transfer devices and latent heat storages is evaluated.