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Demonstration of high efficiency elastocaloric cooling with large ΔT using NiTi wires
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10.1063/1.4746257
/content/aip/journal/apl/101/7/10.1063/1.4746257
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/7/10.1063/1.4746257

Figures

Image of FIG. 1.
FIG. 1.

Thermal images of a nitinol wire being stressed and subsequently relaxed.

Image of FIG. 2.
FIG. 2.

Temperature and Stress curves as function of time for a NiTi wire with 3 mm diameter under tensile test. The wire temperature increases 25.5 °C spontaneously upon loading, and decreases −17 °C within about 10 s of loading/unloading.

Image of FIG. 3.
FIG. 3.

The temperature change of NiTi wires with various diameters under tensile tests. The temperature changes were measured when the applied stress is removed. The fitting curve indicates the theoretical ΔTadiabatic of −20.8 °C.

Image of FIG. 4.
FIG. 4.

Stress strain curves for two pieces of 3 mm diameter wires during the tension (178 cm long sample) and compression tests (1 cm long sample). The areas underneath the loading curve for tension and compression are about 29 and 25.6 MJ/m3, respectively; the areas enveloped by the loading/unloading curve are about 21.1 and 6.6 MJ/m3, respectively.

Tables

Generic image for table
Table I.

Comparison of different cooling technologies.

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/content/aip/journal/apl/101/7/10.1063/1.4746257
2012-08-17
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Demonstration of high efficiency elastocaloric cooling with large ΔT using NiTi wires
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/7/10.1063/1.4746257
10.1063/1.4746257
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