Improvements of a room-temperature magnetic refrigerator combined with Stirling cycle refrigeration effect

Gao, Xinqiang; Shen, Jun; Xiao-hong, HE; Tang, Chengchun; Li, K.; Dai, Wei; Li, Z.X.; Jia, Jichen; Gong, Maoqiong; Wu, Ji

doi:10.1016/j.ijrefrig.2016.02.021

Cited by 22 publications

(9 citation statements)

References 17 publications

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“…The pressure-transformation temperature sensitivity of the CoMnFeGe compound and its excessive brittleness may be viewed as detrimental in terms of regenerator applications, yet powder bed systems are widely accepted as a viable method of cooling. Powder bed regenerators are currently under scrupulous investigation by numerous groups 80 – 84 . Therefore, cycled CoMnGe compounds may still be a contender for caloric applications.…”

Section: Resultsmentioning

confidence: 99%

On the instability of the giant direct magnetocaloric effect in CoMn0.915Fe0.085Ge at. % metamagnetic compounds

Bruno

Yüce

2020

Sci Rep

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The giant magnetocaloric effect was quantified in CoMn 1-x Fe x Ge (x = 0.085–0.12) nom. at. % polycrystals across the high temperature hexagonal (P6 3 /mmc) to low temperature orthorhombic (Pnma) phase transition via differential scanning calorimetry (DSC) and multiple (thermo) magnetization measurements. It was found that increasing Fe content led to the decrease of both the martensitic transformation temperature and entropy change ( ) at the point of the phase transition. Moreover, first-time magnetocaloric measurements resulted in irreproducible entropy change versus temperature diagrams, which was attributed to the release of internal pressure in bulk samples that disintegrated into powder upon transformation. CoMn 1-x Fe x Ge demonstrated larger magnetic field-induced entropy changes and giant magnetocaloric effect (MCE) compared to other CoMnGe alloys doped with Si, Sn, Ti, and Ga. However, the observed brittleness and apparent change in volume at the magnetic transition was posited to influence the material’s potential for regenerative applications.

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Section: Resultsmentioning

confidence: 99%

On the instability of the giant direct magnetocaloric effect in CoMn0.915Fe0.085Ge at. % metamagnetic compounds

Bruno

Yüce

2020

Sci Rep

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“…Due to the development of renewable energy, especially wind and solar, Stirling engines have found application in solar power plants [92][93][94][95][96][97][98][99]. Another sector where they are used is the refrigeration sector [100][101][102][103][104][105][106][107][108]. They are an alternative to the commonly used compressor systems.…”

Section: Stirling Engine Applicationsmentioning

confidence: 99%

Modern Small and Microcogeneration Systems—A Review

2021

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Small and micro energy sources are becoming increasingly important in the current environmental conditions. Especially, the production of electricity and heat in so-called cogeneration systems allows for significant primary energy savings thanks to their high generation efficiency (up to 90%). This article provides an overview of the currently used and developed technologies applied in small and micro cogeneration systems i.e., Stirling engines, gas and steam microturbines, various types of volumetric expanders (vane, lobe, screw, piston, Wankel, gerotor) and fuel cells. Their basic features, power ranges and examples of implemented installations based on these technologies are presented in this paper.

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“… 11 The authors achieved a cooling power of 190 W and a coefficient of performance (COP) of 0.6. Gao et al 12 integrated pressure-based refrigeration with active magnetic refrigeration. They observed a cooling power of 40 W with a maximum magnetic field of 1.4 T. Another rotary-based system was developed by Huang et al.…”

Section: Introductionmentioning

confidence: 99%

Transient performance analysis of a novel design of portable magnetic refrigeration system

et al. 2022

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The widely used ice chamber-based cold storage for the transportation and storage of vaccines has several disadvantages, including uncontrolled overall temperature, water accumulation, and frequent ice pack renewal. Therefore, in this work, we numerically studied a novel vaccine storage system by coupling magnetic refrigeration and ice packs developed by conserving the advantages of an ice-based system. A two-dimensional numerical model is developed to analyze the magnetohydrodynamic natural convection in the storage chamber. Gadolinium of 0.08 kg is used to produce a cooling power of 31.514 W and a coefficient of performance of 1.3. With the constant heat leaked of 0.828 W into the system with dimensions of (0.1 × 0.1) m, the average life of the ice pack of 0.75 kg is 1.03 h. By introducing the magnetocaloric effect, the life of the same ice pack can be infinite with no load. The dynamic mode decomposition analysis reveals that the most dominant fluid interaction occurs between the cooled gadolinium plate and the adjacent fluid, resulting in efficient cooling of the air chamber. The developed vaccine chamber design will significantly improve the existing ice pack system with a nominal increase in cost and system weight.

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Improvements of a room-temperature magnetic refrigerator combined with Stirling cycle refrigeration effect

Cited by 22 publications

References 17 publications

On the instability of the giant direct magnetocaloric effect in CoMn0.915Fe0.085Ge at. % metamagnetic compounds

On the instability of the giant direct magnetocaloric effect in CoMn0.915Fe0.085Ge at. % metamagnetic compounds

Modern Small and Microcogeneration Systems—A Review

Transient performance analysis of a novel design of portable magnetic refrigeration system

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