Elastocaloric modeling of natural rubber

Guyomar, Daniel; Yang, Li; Sebald, Gaël; Cottinet, Pierre‐Jean; Ducharne, Benjamin; Capsal, Jean‐Fabien

doi:10.1016/j.applthermaleng.2013.03.032

Cited by 67 publications

(51 citation statements)

References 19 publications

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“…They observed a strong increase in the effective thermal conductivity with the increased temperature, which could be a consequence of the kinetics of molecules and solid nanoparticles. This was also confirmed by Abareshi et al [112].…”

Section: Ferrohydrodynamics and Heat Transfer In Magnetic Fluidssupporting

confidence: 82%

“…Mn-Fe, La-Fe-Si). It was shown that hysteresis behaviour can drastically reduce the magnetocaloric effect under the cyclic conditions applied in the AMR as well as the AMR performance [112,113]. To the best of our knowledge, there is no AMR model that directly applies the hysteresis of the magnetocaloric material.…”

Section: Hysteresis Lossesmentioning

confidence: 99%

“…However, in this particular case the magnetic field induces thermal rectification due to the magneticfield-dependent thermal conductivity of the ferrofluid. Ferrofluids can therefore be used as thermal diode rectificators, where the anisotropy of the thermal conductivity is manipulated with the magnetic field strength as well as with the direction of the magnetic field [111][112][113][114]. The rectification factor is rather low (e.g.…”

Section: Ferrofluid Thermal Diode That Applies the Anisotropy Of Thermentioning

confidence: 99%

See 2 more Smart Citations

Magnetocaloric Energy Conversion

Kitanovski

Tušek

Tomc

et al. 2015

Green Energy and Technology

244

152

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Section: Ferrohydrodynamics and Heat Transfer In Magnetic Fluidssupporting

confidence: 82%

Section: Hysteresis Lossesmentioning

confidence: 99%

Section: Ferrofluid Thermal Diode That Applies the Anisotropy Of Thermentioning

confidence: 99%

See 1 more Smart Citation

Magnetocaloric Energy Conversion

Kitanovski

Tušek

Tomc

et al. 2015

Green Energy and Technology

244

152

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“…Alternatively to ferroics, elastomeric polymers have also attracted some attention regarding the σ-CE [17][18][19][20][21][22][23]. Elastomers have shown to be particularly suitable for mechanocaloric applications, since they present good fatigue properties combined with high caloric potential [24].…”

Section: Introductionmentioning

confidence: 99%

Giant room-temperature barocaloric effects in PDMS rubber at low pressures

Carvalho

Imamura

Usuda

et al. 2018

European Polymer Journal

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The barocaloric effect is still an incipient scientific topic, but it has been attracting an increasing attention in the last years due to the promising perspectives for its application in alternative cooling devices. Here, we present giant values of barocaloric entropy change and temperature change induced by low pressures in PDMS elastomer around room temperature.Adiabatic temperature changes of 12.0 K and 28.5 K were directly measured for pressure changes of 173 MPa and 390 MPa, respectively, associated with large normalized temperature changes (~70 K GPa -1 ). From adiabatic temperature change data, we obtained entropy change values larger than 140 J kg -1 K -1 . We found barocaloric effect values that exceed those previously reported for any promising barocaloric materials from direct measurements of temperature change around room temperature. Our results stimulate the study of the barocaloric effect in elastomeric polymers and broaden the pathway to use this effect in solid-state cooling technologies.2

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“…They measured an adiabatic temperature change of about 2.5 K, but a near-zero hysteresis can be its great advantage. Furthermore, Guyomar et al [112] analysed the EsCE of the shape-memory polymer natural rubber and measured an adiabatic temperature change of 10 K. The details about some of the most interesting elastocaloric materials and the related EsCE are collected in Table 10.13. It should be noted that in recent years a lot of work was performed on the thermal effects associated with the superelastic (elastocaloric) behaviour, where they mostly studied the impact of the strain rate on the temperature changes of the material; however, in most cases on the virgin samples (with not fully repeatable behaviour) as well as not adiabatically (with lower strain-rates), e.g., [113,114].…”

Section: Elastocaloric Materialsmentioning

confidence: 99%

Alternative Caloric Energy Conversions

Kitanovski

Tušek

Tomc

et al. 2014

Green Energy and Technology

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In this chapter, some alternative, "ferroic", solid-state energy conversion technologies are presented. These are the electrocaloric (pyroelectric), the barocaloric and the elastocaloric energy conversions. In their nature, they are analogous to magnetocaloric energy conversion; however, different external influences are needed to initialize the caloric effect. In the case of electrocaloric energy conversion, this is related to a change in the electric field; in the case of barocalorics, to a change in the hydrostatic pressure and in the case of elastocaloric energy conversion, to a change in the mechanical stress. Each group, to some extent, possesses possible advantages as well as some disadvantages in comparison with magnetocaloric energy conversion. However, since all three alternative solid-state energy conversion technologies are at an early stage of development, it is not yet reasonable to compare them with magnetocaloric energy conversion. It is only time and further research that will show the full potential of these alternative solid-state energy conversion technologies.This chapter is divided into three sections. In each section, the physical principle behind the discussed ferroic effect will be presented and an overview of existing materials with their physical properties will be made. Furthermore, different possibilities for designing an energy conversion device using these materials will be reviewed (especially for electrocalorics). However, since the technology based on these three effects is at an early stage of development, only a few prototypes of energy conversion devices have been presented. Electrocaloric and Pyroelectric Energy ConversionIn this subsection, the electrocaloric and pyroelectric energy conversions are presented and discussed. In general, the electrocaloric energy conversion stands for the heat pumping processes (or refrigeration), whereas the pyroelectric energy conversion stands for the power generation.The underlying mechanism of the electrocaloric energy conversion is the so-called electrocaloric effect. The electrocaloric effect is expressed as the temperature change of dielectric materials subjected to a varying electric field. To simplify, as the electrocaloric material is subjected to a positive electric field change the material heats up, yet as the electric field is turned off the opposite occurs and the material cools down. Speaking thermodynamically, the electrocaloric effect is analogue to the magnetocaloric effect, though instead of the magnetic field change an electric field change is required to induce the caloric effect in the material. However, the electrocaloric energy conversion has some potential advantages over the magnetocaloric energy conversion, such as higher power density and higher compactness of the energy conversion devices, no dependence on rare-earth materials, no moving parts of the device, operation of the devices with less vibrations, silent operation, etc. Nevertheless, the area of the electrocaloric energy conversion only recently attracted m...

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Elastocaloric modeling of natural rubber

Cited by 67 publications

References 19 publications

Magnetocaloric Energy Conversion

Magnetocaloric Energy Conversion

Giant room-temperature barocaloric effects in PDMS rubber at low pressures

Alternative Caloric Energy Conversions

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