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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
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Towards powerful magnetocaloric devices with static electro-permanent magnets.
Urban Tomc1, Simon Nosan1, Katja Klinar1
1Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, 1000 Ljubljana, Slovenia.
Journal of Advanced Research
|May 19, 2022
Summary
Electro-permanent magnets (EPMs) offer an efficient, controllable magnetic field source for magnetocaloric energy conversion. This study demonstrates EPMs with over 80% energy efficiency operating at high frequencies, enabling compact device designs.
Area of Science:
- Energy conversion technologies
- Magnetocaloric effect
- Advanced magnetic field sources
Background:
- Magnetocaloric energy conversion offers an alternative to current refrigeration and energy harvesting technologies.
- Existing magnetic field sources in magnetocaloric devices are inefficient and lack precise control.
- High-frequency operation demands novel, efficient magnetic field sources.
Purpose of the Study:
- To introduce and evaluate an electro-permanent magnetic (EPM) field source for magnetocaloric applications.
- To present a numerical and experimental investigation of a novel EPM design.
- To demonstrate the feasibility of EPMs for efficient, controlled magnetic field generation.
Main Methods:
- Extensive numerical simulations were performed to optimize EPM design parameters.
- An EPM prototype was constructed based on numerical findings.
- Experimental evaluation focused on energy efficiency and temperature rise at various frequencies.
Main Results:
- Demonstrated over 80% energy efficiency for the EPM.
- Achieved stable operation at frequencies up to 50 Hz.
- Confirmed the potential for high-power-density magnetocaloric devices.
Conclusions:
- EPMs provide a highly energy-efficient solution for magnetocaloric devices.
- High-frequency operation up to 50 Hz is achievable.
- EPMs facilitate device miniaturization, paving the way for compact magnetocaloric systems.
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