Results 211 to 220 of about 14,360 (263)

Refrigerator Magnet Investigation

The Physics Teacher, 2023
Refrigerator magnets belong to a group of simple devices that we use all the time but rarely question how they work. While refrigerator magnets have received considerable attention in physics education literature, the focus of these papers was mainly on the explanations of their structure or demonstrations of the structure of the magnetic layer.
Allison Daubert, Žan Jerman, Gorazd Planinsic   +2 more
openaire   +1 more source

Magnetic refrigeration with GdN by Active Magnetic Refrigerator cycle

MRS Proceedings, 2011
ABSTRACTA magnetic refrigeration test was performed using a test device filled with spherical GdN material synthesized by the hot isostatic pressing (HIP) method. Refrigeration with an active magnetic regenerator cycle was tested in the temperature range between 48 and 66 K, with the field changing from 1.2 to 3.7 T and 2.0 to 4.0 T at upper and lower ...
Yusuke Hirayama, Hiroyuki Okada, Takashi Nakagawa, Takao. A. Yamamoto, Takafumi Kusunose, Numazawa Takenori, Koichi Mastumoto, Toshio Irie, Eiji Nakamura   +8 more
openaire   +1 more source

Magnetic nanocomposites for magnetic refrigeration

Nanostructured Materials, 1993
Enhanced magnetocaloric effects have been predicted to occur in composite materials possessing magnetic species which have been reduced to nanometer-sized dimensions. Convincing experimental evidence is first presented here verifying these predictions. A new type of magnetic nanocomposite, one which is a single crystallographic phase, is also reported ...
R.D. Shull, R.D. McMichael, J.J. Ritter
openaire   +1 more source

GeoThermag: A geothermal magnetic refrigerator

International Journal of Refrigeration, 2015
Abstract Magnetic refrigeration has played an important role in the scientific landscape in recent years and could potentially be an alternative to vapour compression technology. Although new prototypes have recently been developed and new material refrigerants have been tested, there is still no equipment that can be used in the refrigeration ...
APREA, Ciro, Greco, Adriana, MAIORINO, ANGELO   +2 more
openaire   +3 more sources

New application of complex magnetic materials to the magnetic refrigerant in an Ericsson magnetic refrigerator

Journal of Applied Physics, 1987
A complex new magnetic refrigerant, suitable for the ideal Ericsson cycle, has been investigated. Above ∼15 K it is necessary to use ferromagnets as a magnetic refrigerant. However, temperature variation for the magnetic entropy change in a homogeneous ferromagnet is not suitable for the Ericsson cycle.
T. Hashimoto, T. Kuzuhara, M. Sahashi, K. Inomata, A. Tomokiyo, H. Yayama   +5 more
openaire   +1 more source

Thermodynamics of magnetic refrigeration

International Journal of Refrigeration, 2006
A comprehensive treatment of the thermodynamics of cyclic magnetic refrigeration processes is presented. It starts with a review of the work, heat and internal energy of a magnetized specimen in a magnetic field, and a list of the thermodynamic potentials is given. These are based on the very recent discovery of an alternative Kelvin force. It is shown
Andrej Kitanovski, Peter W. Egolf
openaire   +1 more source

A new method of producing the magnetic refrigerant suitable for the ericsson magnetic refrigeration

IEEE Transactions on Magnetics, 1987
A layer structural complex magnetic refrigerant, which is suitable for the Ericsson cycle, satisfying the Carnot principle, has been investigated. Above ∼ 15 K, since the thermal agitation energy and the lattice entropy increase considerably, the ferromagnetic material has to be used for the refrigerant in the magnetic refrigeration.
T. Hashimoto, T. Kuzuhara, K. Matsumoto, M. Sahashi, K. Imonata, A. Tomokiyo, H. Yayama   +6 more
openaire   +1 more source

Nanocomposites For magnetic Refrigeration

MRS Proceedings, 1992
ABSTRACTUpon the application of an external magnetic field, the magnetic spins in a material partially align with the field, thereby reducing the magnetic entropy of the spin system. When performed adiabatically, the specimen's temperature will rise.
R.D. Shull, R.D. Mcmichael, J.J. Ritter, L.H. Bennett   +3 more
openaire   +1 more source

Analysis of a magnetic refrigerator

Applied Thermal Engineering, 2011
Abstract A magnetic refrigerator consists of heat exchangers and beds of magnetic materials. The analysis considered a system that operates near room temperature in a magnetic field between 1 and 7.5 T and uses 3 kg of gadolinium (Gd) spheres, packed in two magnetocaloric beds.
Luis Rosario, Muhammad M. Rahman
openaire   +1 more source

Augmenting refrigerator magnets

Proceedings of the 4th Nordic conference on Human-computer interaction: changing roles, 2006
In this paper we present a number of augmented refrigerator magnet concepts. The concepts are shown to be derived from previous research into the everyday use of fridge surfaces. Three broadly encompassing practices have been addressed through the concepts: (i) organization/planning in households; (ii) reminding; and (iii) methods household members use
Alex S. Taylor, Laurel M. Swan, Rachel Eardley, Abigail Sellen, Steve Hodges 0001, Kenneth R. Wood   +5 more
openaire   +2 more sources