Rotary Curie-point heat engine

Barnes, George

doi:10.1119/1.2341985

“…2 3 v m m N c = K (4) Where C is the Curie's constant, m the magnetic moment of an Fe atom, N is the number of atoms per unit volume, K the Boltzmann constant and m v the permittivity of free space. Taking into account the rotation of the disk, we can apply the second law of rotational Newton to this system, where the following equation is obtained: 2 t mra τ = (5) τ is defined as the resulting torque applied to the system, m is the disk mass and a t the tangential acceleration. To make a study of the energy of the system, which is consistent with the movement and the increase of the temperature that the system is winning, the kinetic and thermal energy of the system can be expressed as shown below [8]…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Our article explains the operation of the Curie's principle, which is based on the existence of a certain thermal point in which paramagnetic materials become diamagnetic, this temperature value was discovered by the french physicist Pierre Curie in 1895 [5]. With the above, the operation can be demonstrated in a practical environment, by heating a section of the paramagnetic material, which will be exposed to an electromagnetic field, where this material located on a rotating disk will lose its magnetic properties in the section exposed to heat becoming diamagnetic and losing the influence of the magnetic field only in that part.…”

Section: Introductionmentioning

confidence: 97%

Design and Experimental Study of Tesla’s Thermomagnetic Engine

Rodríguez¹,

Amaya²,

Estupiñán³

2019

TECS

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The scientists have shown great interest in the search for alternative means to generate energy, which are not contaminants and generate significant damage to the environment. One of the quite viable possibilities for this is to consider the construction of thermomagnetic motors, using mainly ferromagnetic materials. These materials are those that for a given temperature value; these lose the magnetic properties they have, that is, to be paramagnetic they become completely diamagnetic during a certain period of exposure to heat. With the objective of demonstrate the Curie's law applied to this type of materials, we designed the model of an engine that works based on this law, to achieve this the tests of the running system were taken, which were filmed and then analyzed using the program Tracker Video Analysis and Modeling Tool for Physics Education. In this paper, we present the results related to the magnetic and thermodynamic study of the efficiency of a motor designed by us, with the aim of showing the validation of Curie's law for iron and also being able to obtain the representative characteristics of this material such as magnetization and the Curie's constant using an experimental method.

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“…To make a study of the energy of the system, which is consistent with the movement and the increase of the temperature that the system is winning, the kinetic and thermal energy of the system can be expressed as shown below [5],…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Design and experimental study of Tesla's thermomagnetic engine

Estupiñán¹,

Rodríguez²,

Amaya³

2018

Preprint

0

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The scientists have shown great interest in the search for alternative means to generate energy, which are not contaminants and generate significant damage to the environment. One of the quite viable possibilities for this is to consider the construction of thermomagnetic motors, using mainly ferromagnetic materials. These materials are those that for a given temperature value; these lose the magnetic properties they have, that is, to be paramagnetic they become completely diamagnetic during a certain period of exposure to heat. With the objective of demonstrate the Curie's law applied to this type of materials, we designed the model of an engine that works based on this law, to achieve this the tests of the running system were taken, which were filmed and then analyzed using the program Tracker Video Analysis and Modeling Tool for Physics Education. In this paper, we present the results related to the magnetic and thermodynamic study of the efficiency of a motor designed by us, with the aim of showing the validation of Curie's law for iron and also being able to obtain the representative characteristics of this material such as magnetization and the Curie's constant using an experimental method.

show abstract

“…The Curie point of a ferromagnetic material is the temperature above which the ferromagnet becomes paramagnetic. − This transition occurs when thermal energy disrupts the alignment of magnetic dipoles in microscopic regions known as domains within the ferromagnetic material . Ferromagnetic and paramagnetic behavior is only observed in substances that have unpaired electrons .…”

Section: Introductionmentioning

confidence: 99%

“…As such, the Curie point phenomenon can provide a platform for discussion of the electronic configuration of the elements. Educators have exploited observations of the Curie temperature of nickel for use in a variety of experiments and demonstrations. − The simplest of these ,, involves attaching a magnet to a coin made of nickel metal, holding the coin over a beaker containing water, and then heating the coin in a flame. When the coin reaches the Curie temperature of nickel (627 K), it undergoes the ferromagnetic to paramagnetic transition.…”

Section: Introductionmentioning

confidence: 99%

Estimation of the Curie Temperature of Nickel Using a Simple Thermodynamic Analysis

Kuntzleman

¹

2023

J. Chem. Educ.

1

0

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An activity is described that uses simple materials and an easy-to-perform protocol to estimate the Curie temperature of nickel, which is the temperature at which nickel loses its ferromagnetism. To do so, an object made of nickel metal is heated with a lighter until it loses its ferromagnetism. The metal is allowed to drop into a beaker that contains a known amount of water at a known temperature. Thermodynamic analysis of the exchange of energy between the metal, water, and beaker allows for an estimate of the Curie temperature of nickel. The activity provides students with the opportunity to explore concepts commonly found in introductory and general chemistry curricula, including thermodynamics and electronic configurations of the elements.

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Rotary Curie-point heat engine

Cited by 6 publications

References 0 publications

Design and Experimental Study of Tesla’s Thermomagnetic Engine

Design and Experimental Study of Tesla’s Thermomagnetic Engine

Design and experimental study of Tesla's thermomagnetic engine

Estimation of the Curie Temperature of Nickel Using a Simple Thermodynamic Analysis

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