Exploring the efficiency potential for an active magnetic regenerator

Eriksen, Dan; Engelbrecht, Kurt; Bjørk, Rasmus

doi:10.1080/23744731.2016.1173495

Cited by 32 publications

(20 citation statements)

References 16 publications

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“…This is analog to the recent improvements in system design while still using large mechanical systems to actuate the eCM. The trend in system design has been to move from the first demonstrators that used single regenerators and electromagnets to more practical systems based on permanent magnets, regenerator beds made from multiple materials and continuously rotating regenerators based on multiple regenerator beds [42][43][44]. These systems have also demonstrated that cooling power generally scales directly with the mass of refrigerant for a fixed applied magnetic field, and it is expected that cooling power in EC devices can also be easily scaled by increasing the mass of eCM.…”

Section: Lessons From Magnetocaloric Researchmentioning

confidence: 99%

“…Using multi-material systems could be an attractive way to increase performance or possibly fatigue life of EC systems. System design aspects that have been shown to reduce efficiency of magnetocaloric coolers that are also relevant for EC devices include parasitic heat losses [44,51] and heat capacity of the regenerator housing [46,52]. Efficient EC designs will need insulation included in the foundation of the system design and should have housings with low thermal mass.…”

Section: Lessons From Magnetocaloric Researchmentioning

confidence: 99%

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Future prospects for elastocaloric devices

Engelbrecht

2019

J. Phys. Energy

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Elastocaloric cooling (EC) is an alternative cooling technology that has been identified as having the potential to be more efficient than vapor compression systems. It is based on the elastocaloric effect, which is a change in temperature coupled to an applied uniaxial strain in materials such as NiTi alloys. Although EC is a promising technology for energy savings in the future, there are still challenges to be addressed if it is to be commercially successful. This paper gives a summary of the state of the art and recent developments in the area as well as perspectives on the most important challenges that must be met to make the technology commercial.

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Section: Lessons From Magnetocaloric Researchmentioning

confidence: 99%

Section: Lessons From Magnetocaloric Researchmentioning

confidence: 99%

Future prospects for elastocaloric devices

Engelbrecht

2019

J. Phys. Energy

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“…123, 034902-1 make a device operate as efficiently as possible 17 while also characterizing how the work is distributed in the device. 18 Generally, device-related studies demonstrate that there is a long list of desired properties for the magnetocaloric refrigerant material. It must have the following:…”

Section: Introductionmentioning

confidence: 99%

Material-based figure of merit for caloric materials

Griffith

Mudryk

Slaughter

et al. 2018

Journal of Applied Physics

306

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The efficient use of reversible thermal effects in magnetocaloric, electrocaloric, and elastocaloric materials is a promising avenue that can lead to a substantially increased efficiency of refrigeration and heat pumping devices, most importantly, those used in household and commercial cooling applications near ambient temperature. A proliferation in caloric material research has resulted in a wide array of materials where only the isothermal change in entropy in response to a handful of different field strengths over a limited range of temperatures has been evaluated and reported. Given the abundance of such data, there is a clear need for a simple and reliable figure of merit enabling fast screening and down-selection to justify further detailed characterization of those material systems that hold the greatest promise. Based on the analysis of several well-known materials that exhibit vastly different magnetocaloric effects, the Temperature averaged Entropy Change is introduced as a suitable early indicator of the material's utility for magnetocaloric cooling applications, and its adoption by the caloric community is recommended.

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“…In addition, they could also present the advantage of a more silent operation, efficient part-load control, a lack of toxic or greenhouse contributing gases, and the possibility for recycling the MCM and magnets at end-of-life (Smith et al 2012). However, it has yet to prove its competitiveness compared to mature vapor compressor technologies (Eriksen et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Integration of a magnetocaloric heat pump in a low-energy residential building

et al. 2018

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Exploring the efficiency potential for an active magnetic regenerator

Cited by 32 publications

References 16 publications

Future prospects for elastocaloric devices

Future prospects for elastocaloric devices

Material-based figure of merit for caloric materials

Integration of a magnetocaloric heat pump in a low-energy residential building

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