A regenerative elastocaloric device: experimental results

Engelbrecht, Kurt; Eriksen, Dan; Lei, Tian; Lee, Chong-Yi; Tušek, Jaka; Pryds, Nini

doi:10.1088/1361-6463/aa8656

Cited by 103 publications

(55 citation statements)

References 31 publications

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“…Tušek and Engelbrecht et al. presented and improved a cooling demonstrator based on active regeneration . In the meantime, several reviews of the different elastocaloric cooling devices and materials are available .…”

Section: Engineering Of Sma Film‐based Cooling Devicesmentioning

confidence: 99%

“…[56] The potential of active regenerationi nt he field of elastocalorics has been demonstrated in Ref. [20].T he high temperature spans reported in the literature [57] and the existing experience in magnetocaloric cooling [54] make this concept interesting also for miniature-scale cooling.…”

Section: Active Regenerationmentioning

confidence: 99%

“…[19,52,58] Tu šek and Engelbrecht et al presented and improved ac ooling demonstrator based on active regeneration. [20,57] In the meantime, severalr eviews of thed ifferent elastocaloric cooling devices and materials are available. [6,29,32,59,60] Comparing the performance data obtained for completely different technologies is hardly possible,a st here is no standardized way to determine performancem etrics of elastocaloric cooling devices.…”

Section: Active Regenerationmentioning

confidence: 99%

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Elastocaloric Cooling on the Miniature Scale: A Review on Materials and Device Engineering

Bruederlin

Bumke²,

Chluba³

et al. 2018

Energy Tech

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This Review covers the fundamentals of operation and scaling of elastocaloric cooling devices as well as current developments of elastocaloric shape‐memory alloy (SMA) films and the engineering of SMA film‐based cooling devices. Sputter‐deposited TiNiCuCo alloys showing ultra‐low fatigue enable unique functional properties such as tailored transformation temperature gradients. Two substantially different concepts for the development of elastocaloric cooling demonstrators are discussed. One concept relies on heat transfer by mechanical contact between the elastocaloric SMA film and solid heat sink and source elements. The second concept makes use of the heat transfer between the elastocaloric SMA film and a heat transfer fluid, including the advanced technology of active regeneration. Demonstrators based on a single SMA film reach device temperature spans of 14 K and a high specific cooling power of up to 18 W g−1. The performance characteristics are compared with other solid‐state caloric cooling technologies.

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Section: Engineering Of Sma Film‐based Cooling Devicesmentioning

confidence: 99%

Section: Active Regenerationmentioning

confidence: 99%

Section: Active Regenerationmentioning

confidence: 99%

See 1 more Smart Citation

Elastocaloric Cooling on the Miniature Scale: A Review on Materials and Device Engineering

Bruederlin

Bumke²,

Chluba³

et al. 2018

Energy Tech

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“…Subsequently, the heat is extracted by a hot (HHEX) and cold (CHEX) heat exchanger. The investigation of an improved design, based on 0.35 mm plates, demonstrates a maximum no‐load temperature span of 19.9 K under an applied strain of 3.5 % …”

Section: State‐of‐the‐art Elastocaloric Coolingmentioning

confidence: 99%

NiTi‐Based Elastocaloric Cooling on the Macroscale: From Basic Concepts to Realization

et al. 2018

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Solid‐state cooling is an environmentally friendly, no global warming potential alternative to vapor compression‐based systems. Elastocaloric cooling based on NiTi shape memory alloys exhibits excellent cooling capabilities. Due to the high specific latent heats activated by mechanical loading/unloading, large temperature changes can be generated in the material. The small required work input enables a high coefficient of performance. An overview of elastocaloric cooling from basic principles, such as elastocaloric cooling cycles, material characterization, modeling, and optimization, to the design of elastocaloric cooling devices is presented. Current work performed within the DFG (Deutsche Forschungsgemeinschaft) Priority Program SPP 1599 “Ferroic Cooling”, which is focused on the development and realization of a continuously operating elastocaloric cooling device, is highlighted. The cooling device operates in a rotatory mode with wires under tensile loading. The design allows maximization of cooling power by suitable wire diameter scaling as well as efficiency optimization by implementing a novel drive concept. Finally, computer‐aided design (CAD) models of the discussed solid‐state air cooling device are presented.

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“…The so called caloric effects (magnetocaloric/barocaloric/elastocaloric/electrocaloric effect) are due to the entropy change upon variation of an external agent (magnetic field/pressure/stress/ electric field). Although the magnetocaloric effect [1][2][3][4][5][6][7][8][9] is the most studied, the barocaloric, [10][11][12][13][14] elastocaloric, [15][16][17][18][19][20][21] and the electrocaloric effects [22][23][24][25][26] are also important for application in solid state refrigerators. [27][28][29][30] In the magnetocaloric effect, the physical mechanism involved in the entropy change is the increase/ decrease of magnetization as a function of temperature and magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Charge Transfer Induced Caloric Effects

Oliveira

2018

Physica Status Solidi (b)

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In this paper, the entropy change and the caloric effects induced by charge transfer are discussed. According to the general discussion based on simple physical arguments in the framework of itinerant electrons, large caloric effects can be induced by the charge transfer mechanism even in non‐magnetic materials. This fact, which can be very important to build solid state refrigerators with high performance, opens a new horizon in this area of research. We also suggest some compounds which are good candidates to exhibit caloric effects induced by the physical mechanism of charge transfer in a wide range of temperatures.

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A regenerative elastocaloric device: experimental results

Cited by 103 publications

References 31 publications

Elastocaloric Cooling on the Miniature Scale: A Review on Materials and Device Engineering

Elastocaloric Cooling on the Miniature Scale: A Review on Materials and Device Engineering

NiTi‐Based Elastocaloric Cooling on the Macroscale: From Basic Concepts to Realization

Charge Transfer Induced Caloric Effects

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