Achieving kilowatt-scale elastocaloric cooling by a multi-cell architecture

Nature, Journal Year: 2025, Volume and Issue: 639(8053), P. 87 - 92

Published: Feb. 26, 2025

Language: Английский

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Elastocaloric can cooler: an exemplary technology transfer to use case application

Frontiers in Materials, Journal Year: 2025, Volume and Issue: 12

Published: March 24, 2025

The elastocaloric effect offers a promising alternative to conventional compressor-based heating and cooling systems. This technology leverages solid-state phase transformations with high energy densities, eliminating the need for environmentally harmful refrigerants. As result, systems can be developed both applications that are sustainable, highly efficient, scalable. In this study, first “mini-fridge” operating under tensile load is developed, using air as heat transfer medium. system based on world’s continuously air-to-air machine demonstrator. primary focus of study investigate transition from generic demonstrator an application-oriented system. A simulation tool enables investigation optimization various parameters such material dimensions, profiles, latent heats intended application. application targeted in designed cool standard 0.25 L beverage can. Shape memory alloy wire bundles subjected loading unloading cycles by patented converter. To effectively harness released during transformation, must optimally directed over bundles. process achieved circulating around bundles, progressively volume. employed determine optimal geometric aims develop internal validate entire setup, inner chamber equipped temperature sensors monitor performance. These strategically placed along axis rotation measure enters exits chamber. initial measurements difference approximately 3.5 K within versus simulated value 8.7 K, which did not include all possible losses present suggests COP at steady state 5.8, experimentally verified future work.

Language: Английский

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Sustainable all-solid elastocaloric cooler enabled by non-reciprocal heat transfer

Nature Sustainability, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Language: Английский

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Large thermoelastic effect in martensitic phase of ferroelastic alloys for high efficiency heat pumping

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: May 15, 2025

Solid state heat pumping using latent from first order ferroic phase transitions is a promising green alternative to traditional vapor compression technology. However, the intrinsic transition hysteresis poses limitation on energy efficiency. Here, we propose reversible anhysteretic elastic deformation in martensitic of ferroelastic alloys. Conventionally, this thermoelastic effect (TeE) considered too weak be practical. But find that [100]-textured Ti78Nb22 polycrystals, TeE can produce large adiabatic temperature change (∆Tad) 4-5 K at 413-473 due macroscopic linear thermal expansion (αl = 10-4/K). This not only far exceeds those ordinary metals ( ΔTad≈0.2K ) but also brings material-level efficiency reaches about 90% Carnot theoretical limit. In other alloys with larger αl (up 5.4 × 10-4/K), predicted bring an even ∆Tad 22 K) while maintaining relatively high Our findings offer non-phase-transition-based way for solid pumping.

Language: Английский

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Elastocaloric goes compact

Joule, Journal Year: 2025, Volume and Issue: 9(5), P. 101960 - 101960

Published: May 1, 2025

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