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  4. Modeling of an Elastocaloric Cooling System for Determining Efficiency
 
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2022
Journal Article
Title

Modeling of an Elastocaloric Cooling System for Determining Efficiency

Abstract
When it comes to covering the growing demand for cooling power worldwide, elastocalorics offer an environmentally friendly alternative to compressor-based cooling technology. The absence of harmful and flammable coolants makes elastocalorics suitable for energy applications such as battery cooling. Initial prototypes of elastocaloric systems, which transport heat by means of thermal conduction or convection, have already been developed. A particularly promising solution is the active elastocaloric heat pipe (AEH), which works with latent heat transfer by the evaporation and condensation of a fluid. This enables a fast and efficient heat transfer in a compression-based elastocaloric cooling system. In this publication, we present a simulation model of the AEH based on MATLAB-Simulink. The model showed very good agreement with the experimental data pertaining to the maximum temperature span and maximum cooling power. Hereby, non-measurable variables such as efficiency and heat fluxes in the cooling system are accessible, which allows the analysis of individual losses including the dissipation effects of the material, non-ideal isolation, losses in heat transfer from the elastocaloric material to the fluid, and other parasitic heat flux losses. In total, it can be shown that using this AEH-approach, an optimized system can achieve up to 67% of the material efficiency.
Author(s)
Bachmann, Nora  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Schwarz, Daniel  orcid-logo
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Bach, David  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Schäfer-Welsen, Olaf  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Koch, Thomas
Bartholome, Kilian
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Journal
Energies  
Project(s)
ElastoCool  
Funder
Bundesministerium für Bildung und Forschung -BMBF-  
Open Access
DOI
10.3390/en15145089
Additional link
Full text
Language
English
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Keyword(s)
  • Elastocaloric cooling

  • Simulation

  • Efficiency

  • Analytic model

  • Latent heat transfer

  • Shape memory alloy

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