A heat driven elastocaloric cooling system

Qian, Suxin; Wang, Yao; Li, Yuan; Yu, Jianlin

doi:10.1016/j.energy.2019.06.094

Cited by 42 publications

(12 citation statements)

References 32 publications

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“…This release heat is exchanged with a heat sink by solid or liquid conduction.. The third step is the adiabatic unloading of the alloy, which allows the material to undergo the reverse transformation and absorbs heat from the environment, which corresponds to the last step [116,[119][120][121][122][123][124]. Ideally, the fourth step must comprise an adiabatic transformation, so the system can be cooled by the absorption of heat by the material.…”

Section: Elastocaloric Effect (Ec): the Promising Cu-zn-al And Cu-al-mn Systemsmentioning

confidence: 99%

Revisiting Cu-based shape memory alloys: Recent developments and new perspectives

Mazzer

Silva

Gargarella

2022

Journal of Materials Research

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Cu-based shape memory alloys belong to one important class of functional alloys, presenting shape memory effect and superelasticity due to their reversible martensitic transformation. Although they have been extensively studied since the middle of the last century, there are still many challenges to be solved. In the last decades, these alloys were extensively studied regarding new compositions, processing routes, phase transformation, mechanical and functional properties. Aspects of the thermoelastic phase transformation have been described using thermodynamic and thermo-mechanical studies, while the role of metallurgical features (such as grain size and morphology, ordering, precipitates and second phases) have been described mainly by phenomenological approach. In this sense this review discusses the advances in the general fundamentals of Cu-based shape memory alloys, the recent developments in processing routes, compositions, and applications in the last years. Graphical abstract

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Section: Elastocaloric Effect (Ec): the Promising Cu-zn-al And Cu-al-mn Systemsmentioning

confidence: 99%

Revisiting Cu-based shape memory alloys: Recent developments and new perspectives

Mazzer

Silva

Gargarella

2022

Journal of Materials Research

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“…In this way, only a single actuator is needed to strain the SMA foil and switch thermal contacts between source and sink to direct heat flow (as shown in figure 3b). The need to find a model capable of predicting the quantity of SMA material to be inserted, the sizing of the prototype, in general, has led to the definition of rotary prototypes presented in the works [29,38,40,33,21]. Recently, the German group [37] of Saarland University, introduced a new rotary elastocaloric prototype mounting wires of Ni 45Ti47.25Cu5V2.75 whose fatigue life is longer than the binary Ni-Ti alloys and exhibiting a ΔT ad of 28 K if loaded with a strain rate of 0.05 s -1 up to a maximum strain of 8.5%.…”

Section: Recent Studies On Elastocaloric Cooling Devicementioning

confidence: 99%

elastoCaloric (eC) Cooling: recent studies and preliminary results on materials and devices

Cirillo

Farina

Greco

et al. 2022

J. Phys.: Conf. Ser.

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Refrigeration is a process aimed at lowering the temperature of an environment compared to the outside temperature. It has always played a fundamental role in modern industry: food, for the preservation of food; in the air conditioning of buildings, to make them habitable and even in the field of medicine and biology, for the preservation of samples and particular therapies. Today refrigeration systems, are responsible for about 17% of the world's electricity consumption. Therefore, the scientific community is researching solid-state refrigeration, which is 50% more efficient than vapour compression systems. Solid-state refrigeration is based on some materials' caloric effect, which can release or absorb latent heat when subjected to an external field (magnetic, electric, pressure or strain) release. Elastocaloric Refrigeration is one of the most minor explored frontiers, unlike magnetocaloric and electro-caloric systems. Some preliminary studies confirm that the eC systems have the advantage of being able to decrease the intensity of the external field (with a relative increase of the COP). In this work, a review on Ec systems is carried out, with particular attention to the description of the properties of the materials used, the various types of stress application. The results have been presented in terms of temperature, entropy, latent heat and COP.

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“…In 2018, Huo et al [78] applied a magnetostriction actuator (Terfenol-D), which could generate strains of up to 0.2 % to load/ unload a Cu-Al-Mn elastocaloric alloy. In 2019, Qian et al [79] proposed a linear heat-driven SMA actuator to load and unload the elastocaloric materials. It can generate the required stresses and strains, but its drawback is its relatively low operating frequency.…”

Section: Review Of Different Driver Concepts Applied In Elastocaloricmentioning

confidence: 99%

Elastocaloric Cooling: State-of-the-art and Future Challenges in Designing Regenerative Elastocaloric Devices

Kabirifar

Žerovnik

Ahčin

et al. 2019

SV-JME

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The elastocaloric cooling, utilizing latent heat associated with martensitic transformation in shape-memory alloys, is being considered in the recent years as one of the most promising alternatives to vapour compression cooling technology. It can be more efficient and completely harmless to the environment and people. In the first part of this work, the basics of the elastocaloric effect (eCE) and the state-of-the-art in the field of elastocaloric materials and devices are presented. In the second part, we are addressing crucial challenges in designing active elastocaloric regenerators, which are currently showing the largest potential for utilization of eCE in practical devices. Another key component of elastocaloric technology is a driver mechanism that needs to provide loading for active elastocaloric regenerators in an efficient way and recover the released energy during their unloading. Different driver mechanisms are reviewed and the work recovery potential is discussed in the third part of this work.

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A heat driven elastocaloric cooling system

Cited by 42 publications

References 32 publications

Revisiting Cu-based shape memory alloys: Recent developments and new perspectives

Revisiting Cu-based shape memory alloys: Recent developments and new perspectives

elastoCaloric (eC) Cooling: recent studies and preliminary results on materials and devices

Elastocaloric Cooling: State-of-the-art and Future Challenges in Designing Regenerative Elastocaloric Devices

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