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Continuous and efficient elastocaloric air cooling by coil-bending.

ABSTRACT: Elastocaloric cooling has emerged as an eco-friendly technology capable of eliminating greenhouse-gas refrigerants. However, its development is limited by the large driving force and low efficiency in uniaxial loading modes. Here, we present a low-force and energy-efficient elastocaloric air cooling approach based on coil-bending of NiTi ribbons/wires. Our air cooler achieves continuous cold outlet air with a temperature drop of 10.6 K and a specific cooling power of 2.5 W g^-1 at a low specific driving force of 26 N g^-1. Notably, the cooler shows a system coefficient of performance of 3.7 (ratio of cooling power to rotational mechanical power). These values are realized by the large specific heat transfer area (12.6 cm² g^-1) and the constant cold zone of NiTi wires. Our coil-bending system exhibits a competitive performance among caloric air coolers.

SUBMITTER: Li X

PROVIDER: S-EPMC10693641 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature

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Continuous and efficient elastocaloric air cooling by coil-bending.

Li Xueshi X Hua Peng P Sun Qingping Q

Nature communications 20231202 1

Elastocaloric cooling has emerged as an eco-friendly technology capable of eliminating greenhouse-gas refrigerants. However, its development is limited by the large driving force and low efficiency in uniaxial loading modes. Here, we present a low-force and energy-efficient elastocaloric air cooling approach based on coil-bending of NiTi ribbons/wires. Our air cooler achieves continuous cold outlet air with a temperature drop of 10.6 K and a specific cooling power of 2.5 W g<sup>-1</sup> at a lo ...[more]

PMID: 38042868

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