International journal of refrigeration, Vol. 37 N° 1. International journal of refrigeration - Janvier 2014
| Titre : | International journal of refrigeration, Vol. 37 N° 1. International journal of refrigeration - Janvier 2014 |
| Type de document : | Bulletin |
| Paru le : | 23/01/2014 |
Dépouillements
Article : texte imprimé
Osmann Sari, Auteur ;
Mohamed Balli, Auteur
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Ensure wellbeing for each of us is a first necessity for peace and development of society while preserving the environmental balance of the blue planet. Today's society is faced with major challenges such as the supply of energy, water, food, et[...]
Article : texte imprimé
M. Ožbolt, Auteur ;
A. Kitanovski, Auteur ;
Jaka Tušek, Auteur
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Currently, one of the most interesting alternatives to conventional compressor refrigeration is magnetic refrigeration. However, despite its great potential, some important obstacles, relating mostly to the relatively low power density and the r[...]
Article : texte imprimé
A. Kitanovski, Auteur ;
U. Plaznik, Auteur ;
Jaka Tušek, Auteur
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Most of the existing prototype devices for magnetic refrigeration are based on a thermodynamic cycle with an active magnetic regenerator (AMR) that operates as a Brayton-type regenerative magnetic refrigeration cycle. However, there are several [...]
Article : texte imprimé
Y. Chiba, Auteur ;
Smaili, Arezki, Auteur ;
C. Mahmed, Auteur
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In this paper, numerical and experimental investigations on a magnetic refrigeration device based upon the active magnetic regeneration (AMR) cycle operating near room temperature are presented. A numerical 1D model based on the transient energy[...]
Article : texte imprimé
P. Nikkola, Auteur ;
C. Mahmed, Auteur ;
M. Balli, Auteur
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The 1D active magnetic regenerator model developed at the University of Applied Sciences of Western Switzerland is described. The system of two partial differential equations is discretized with the finite differences method backward in time and[...]
Article : texte imprimé
Thomas Burdyny, Auteur ;
Alex Ruebsaat-Trott, Auteur ;
Andrew Rowe, Auteur
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A system modeling approach for predicting the performance of active magnetic regenerators using a one-phase approximation is presented. The approach is described for an arbitrary AMR device independent of the magnetic refrigerant, thermal losses[...]
Article : texte imprimé
A. Czernuszewicz, Auteur ;
J. Kaleta, Auteur ;
M. Królewicz, Auteur
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A laboratory test stand for magnetocaloric effect investigations has been developed. The test stand is compact and easily reconfigurable. Gadolinium in the form of particles is used as a refrigerant. The material is magnetized/demagnetized due t[...]
Article : texte imprimé
H. R. E. H. Bouchekara, Auteur ;
A. Kedous-Lebouc, Auteur ;
J.-P. Yonnet, Auteur
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In this paper, computational algorithms of different multiobjective optimization techniques and their application for AMR systems are presented. In order to illustrate the effectiveness of the proposed methods, they have been demonstrated on a l[...]
Article : texte imprimé
C. R. H. Bahl, Auteur ;
K. Engelbrecht, Auteur ;
D. Eriksen, Auteur
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A novel rotary magnetic refrigeration device has been designed and constructed following the concepts recently outlined in Bahl et al. (2011). The magnet and flow system design allow for almost continuous usage of both the magnetic field and the[...]
Article : texte imprimé
S. Jacobs, Auteur ;
J. Auringer, Auteur ;
A. Boeder, Auteur
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Astronautics has constructed a large-scale rotary magnetic refrigerator which was designed to provide 2 kW of cooling power over a temperature span of 12 K with Electrical Coefficient Of Performance (COPe) > 2. The system uses a NdFeB magnet as[...]
Article : texte imprimé
J. A. Lozano, Auteur ;
K. Engelbrecht, Auteur ;
C. R. H. Bahl, Auteur
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Experimental results for a recently developed prototype magnetic refrigeration device at the Technical University of Denmark (DTU) were obtained and compared with numerical simulation results. A continuously rotating active magnetic regenerator [...]
Article : texte imprimé
D.S. Arnold, Auteur ;
A. Tura, Auteur ;
Alex Ruebsaat-Trott, Auteur
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A second-generation room-temperature permanent magnet active magnetic regenerator test apparatus using Halbach arrays is described. The magnet arrays consist of three concentric cylinders. Each cylinder is constructed using 12 permanent magnet s[...]
Article : texte imprimé
Article : texte imprimé
Jaka Tušek, Auteur ;
Andrej Kitanovski, Auteur ;
Urban Tomc, Auteur
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We present experimental comparison of different parallel-plate active magnetic regenerators (AMRs) with two different groups of magnetocaloric materials. First, a gadolinium-based single-layered AMR was tested and analysed under different operat[...]
Article : texte imprimé
K.K. Nielsen, Auteur ;
C. R. H. Bahl, Auteur ;
A. Smith, Auteur
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The performance of Active Magnetic Regenerators (AMR) does not depend solely on the magnetocaloric effect of their constituents. Rather, it depends on several additional parameters, including, magnetic field, geometry (hydraulic diameter, cross-[...]
Article : texte imprimé
Jianghong Wu, Auteur ;
Chaopeng, Liu, Auteur ;
Puxiu, Hou, Auteur
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Numerical simulations are performed to investigate the performance of an active magnetic regenerator (AMR) operating near room temperature. A two-dimensional porous model is established to analyze the impact different heat transfer fluids (HTFs)[...]
Article : texte imprimé
U. Legait, Auteur ;
F. Guillou, Auteur ;
A. Kedous-Lebouc, Auteur
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To optimize the performance of an active magnetic regenerative system (AMR), it is important to understand the heat transfer phenomena taking place in the regenerator and the impact of the intrinsic properties of the magnetocaloric material. Wit[...]
Article : texte imprimé
B. Torregrosa-Jaime, Auteur ;
J. M. Corberán, Auteur ;
C. Vasile, Auteur
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This paper focuses on the design of an innovative air-conditioning system, namely a magnetocaloric air-conditioner for an electric minibus. An integrated design of the complete system is necessary, as the hot and cold side of the regenerator wil[...]
Article : texte imprimé
J. M. Gatti, Auteur ;
C. Müller, Auteur ;
C. Vasile, Auteur
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Magnetic cooling technology has experienced significant developments over the last five years. Most of the magneto-caloric prototypes use magneto-caloric alloys subject to variable magnetic field and coolant flow synchronized with the magnetisat[...]
Article : texte imprimé
Peter W. Egolf, Auteur ;
L. Gravier, Auteur ;
T. Francfort, Auteur
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Magnetic heat pumps, refrigerators and energy conversion prototypes, with an operation based on the magnetocaloric effect, usually show a restriction in their frequency of operation to a few Hertz. In 2010 it was proposed to apply thermal switch[...]
Article : texte imprimé
Urban Tomc, Auteur ;
Jaka Tušek, Auteur ;
Andrej Kitanovski, Auteur
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This article introduces a novel heat-transfer mechanism for magnetocaloric energy conversion based on the introduction of thermoelectric thermal diodes. These can provide the very rapid transport of heat from/to the magnetocaloric material. For [...]
Article : texte imprimé
U. L. Olsen, Auteur ;
C. R. H. Bahl, Auteur ;
K. Engelbrecht, Auteur
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A high-performance magnetic refrigeration device is considered as a potential technology for in-vehicle air conditioners in electric vehicles. The high power consumption of a conventional air conditioner in an electric vehicle has considerable i[...]
Article : texte imprimé
M. Petit, Auteur ;
Avenas, Yvan, Auteur ;
A. Kedous-Lebouc, Auteur
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Liquid cooling of electronic devices requires generally a mechanical pump which reduces the performance of the system and its reliability. It has already been shown that ferrofluids with low Curie temperature are able to create a liquid flow wit[...]
Article : texte imprimé
L. D. R. Ferreira, Auteur ;
C. V. X. Bessa, Auteur ;
I. da Silva, Auteur
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One prototype of a linear reciprocating thermomagnetic motor designed to work with hot water obtained from plane solar collectors as a hot source and water at room temperature as cold source has been under development. In this motor, the force e[...]
Article : texte imprimé
C. S. Alves, Auteur ;
F. C. Colman, Auteur ;
G. L. Foleiss, Auteur
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The increasing demand for energy has driven society to explore different sources of energy, seeking to achieve sustainability. In this sense, we designed a thermal machine whose energy source is solar, which was based on the working principle of[...]
Article : texte imprimé
A. M. Tishin, Auteur ;
Y. I. Spichkin, Auteur
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Recent results in understanding of the magnetocaloric effect (MCE) mechanisms in the framework of thermodynamic approach are regarded and discussed. Importance of relation between ΔSMT (magnetic entropy change at constant temperature) and ΔSMH ([...]
Article : texte imprimé
Y. I. Spichkin, Auteur ;
R. R. Gimaev, Auteur
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The methods of experimental investigations of the magnetocaloric parameters (adiabatic temperature change and isothermal magnetic entropy change caused by external magnetic field) are reviewed and discussed. The direct and indirect methods are c[...]
Article : texte imprimé
N. A. de Oliveira, Auteur ;
P. J. von Ranke, Auteur ;
A. Troper, Auteur
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In this review paper we present a theoretical description of the magnetocaloric and barocaloric effects in metallic compounds. The theoretical formulation is separated in two categories namely, [1] systems whose magnetism is due to localized mag[...]
Article : texte imprimé
I. A. Starkov, Auteur ;
A. S. Starkov, Auteur
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In this work, we present the theoretical description of thermodynamics of the solid-state cooler based on multiferroic materials. By virtue of the derived equations, we examine the temperature dependence of multiferroic with simultaneous exposur[...]
Article : texte imprimé
Vittorio Basso, Auteur ;
Carlo P. Sasso, Auteur ;
Michaela Küpferling, Auteur
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Magnetocaloric properties close to first order and second order phase transitions are presented and discussed. The specific heat capacity as a function of the magnetic field and the magnetic field induced entropy change has been measured by dire[...]
Article : texte imprimé
Vittorio Basso, Auteur ;
Elena Sonia Olivetti, Auteur ;
Luca Martino, Auteur
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In this paper we investigate the entropy change and the kinetics at the magneto-structural transition (at 628 K) of polycrystalline MnBi. Samples were prepared by rapid quenching and annealing and exhibit 86 wt% of the hexagonal MnBi phase. The [...]
Article : texte imprimé
V. V. Sokolovskiy, Auteur ;
V. D. Buchelnikov, Auteur ;
V. V. Khovaylo, Auteur
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Influence of the strength of magnetic exchange interactions and impact of a ferromagnetic-antiferromagnetic exchange competition on magnetocaloric effect in a Ni50Mn34In16 Heusler alloy are studied by a Monte Carlo simulation. Temperature depend[...]
Article : texte imprimé
R. Niemann, Auteur ;
O. Heczko, Auteur ;
L. Schultz, Auteur
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Giant caloric effects were reported in elasto-, electro- and magnetocaloric materials near phase transformations. Commonly, their entropy change is indirectly evaluated by a Maxwell relation. Additionally to the well-known spurious “colossal” re[...]
Article : texte imprimé
D. M. Nicholson, Auteur ;
Kh. Odbadrakh, Auteur ;
B. A. Shassere, Auteur
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Magnetic shape memory alloys have great promise as magneto-caloric effect refrigerant materials due to their combined magnetic and structural transitions. Computational and experimental research is reported on the Ni2MnGa material system. The ma[...]
Article : texte imprimé
B. P. Alho, Auteur ;
P. O. Ribeiro, Auteur ;
T. S. T. Alvarenga, Auteur
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In this work we calculate the magnetic properties and the magnetocaloric effect in Gd1−yDyyAl2 (y = 0, 0.25, 0.5, 0.75 and 1). The model Hamiltonian includes contributions from the Zeeman effect, the crystalline electrical field anisotropy and t[...]
Article : texte imprimé
L. von Moos, Auteur ;
K.K. Nielsen, Auteur ;
K. Engelbrecht, Auteur
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The magnetocaloric first order material MnFe(P,As) is a candidate for room temperature magnetic refrigeration. However, these materials have intrinsic hysteresis and the impact on the refrigeration performance has not yet been thoroughly investi[...]
Article : texte imprimé
J. Forchelet, Auteur ;
L. Zamni, Auteur ;
S. El Maudni El Alami, Auteur
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For successful implementation in magnetic refrigeration systems, the corrosion resistance of gadolinium and La–Fe–Co–Si compounds in different heat conducting fluids has been studied. Two types of tests were used: immersion at room temperature ([...]
Article : texte imprimé
J. V. Leitão, Auteur ;
P. van Dommelen, Auteur ;
F. Naastepad, Auteur
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A specific heat measuring instrument, with the capacity for the application of magnetic fields up to 9 T, resorting to microcalorimetry chips from the company Xensor Integration, has been successfully assembled and its functioning specifications[...]
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