Elastocaloric cooling of shape memory alloys: A review

Chen, Junyu; Lei, Liping; Fang, Gang

doi:10.1016/j.mtcomm.2021.102706

Cited by 57 publications

(19 citation statements)

References 104 publications

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“…33 Recent reviews of eCMs can be found in the literature. [34][35][36][37][38] To date, about 10 proof-of-the-concept elastocaloric devices have been developed and tested. 15,34 In general, they can be classified according to the heat transfer mechanisms, the applied thermodynamic cycles, and the loading modes.…”

Section: Context and Scalementioning

confidence: 99%

High-performance cooling and heat pumping based on fatigue-resistant elastocaloric effect in compression

Ahčin

Dall’Olio

Žerovnik

et al. 2022

Joule

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Section: Context and Scalementioning

confidence: 99%

High-performance cooling and heat pumping based on fatigue-resistant elastocaloric effect in compression

Ahčin

Dall’Olio

Žerovnik

et al. 2022

Joule

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“…It is widely acknowledged that besides shape-memory and superelastic properties, shape-memory materials display many other functional capabilities, which make them desirable for a broad spectrum of technological applications. Among these capabilities, during the last few years a lot of attention has been paid to their excellent caloric response which suggests that these materials have a great potential for solid-state refrigeration and energy harvesting applications [1,2]. The large thermal response is a consequence of the release or absorption of the latent heat intrinsically associated with the first-order martensitic transition, which is at the origin of the memory properties exhibited by shape-memory materials [3].…”

Section: Introductionmentioning

confidence: 99%

Caloric Effects Induced by Uniform and Non-uniform Stress in Shape-Memory Materials

Porta

Castán

Saxena

et al. 2023

Shap. Mem. Superelasticity

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A Ginzburg–Landau model is developed that is adequate to describe a square-to-rectangle martensitic transition with associated shape-memory and superelastic properties. Using this model we study caloric effects in the vicinity of the martensitic transition induced by stress and we compare the case of a uniform uniaxial stress and the case of a non-uniform continuous distribution of stresses that produce bending of the material. The former case corresponds to an elastocaloric effect and the latter corresponds to a flexocaloric effect. The aim of the work is to quantitatively compare both cases, which we show must be accomplished in terms of equal amounts of exchanged mechanical work. It is then obtained that the flexocaloric effect is more efficient for low exchanged work but less efficient for large exchanged work.

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“…Other cooling strategies include using artificial air currents [21] or developing a cooling heat sink [22] to help dissipate heat and restore the original shape of an SMA. Additionally, an elastocaloric cooling technology was explored [23]. Various cooling methods have also been compared, such as by using thermal grease to create a heat sink [24] or comparing different cooling methods by using artificial air convection, water, and cryogenic liquid nitrogen [25].…”

Section: Introductionmentioning

confidence: 99%

Hoist-Based Shape Memory Alloy Actuator with Multiple Wires for High-Displacement Applications

et al. 2023

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Shape memory alloys (SMAs) are smart materials that change their crystalline structures when subjected to heat or tension, resulting in a macroscopic deformation. When applied to actuators, SMAs present a remarkable load–weight ratio and flexibility, making them suitable for diverse applications. However, challenges such as their energy consumption, nonlinear control, and low displacement must be considered. This paper presents a new strategy for improving the total displacement while adding neither supplementary SMA wires nor complex external devices. In addition, a novel control strategy is proposed to improve the nonlinearity of SMAs’ behavior. A hoist system was developed to linearly increase the displacement with the number of pulleys and wire turns used. The design also used parallel actuation to increase the load capacity. The actuator presented a high load capacity with reduced weight, lifting more than 100 times its own mass, with a low-cost and robust external system. The simplicity of the actuator’s control and production and its lightness make it a suitable option for a wide range of applications, including wearable exoskeletons.

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Elastocaloric cooling of shape memory alloys: A review

Cited by 57 publications

References 104 publications

High-performance cooling and heat pumping based on fatigue-resistant elastocaloric effect in compression

High-performance cooling and heat pumping based on fatigue-resistant elastocaloric effect in compression

Caloric Effects Induced by Uniform and Non-uniform Stress in Shape-Memory Materials

Hoist-Based Shape Memory Alloy Actuator with Multiple Wires for High-Displacement Applications

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