Design and Basic Consideration of Electromagnetic Heating Yarns with Foucault Currents for Smart Functional Fabrics

2017 ◽  
Vol 265 ◽  
pp. 772-778 ◽  
Author(s):  
R.R. Sattarov ◽  
E.F. Galiakberova
Keyword(s):  
Thermal Energy ◽  
Eddy Current ◽  
Functional Materials ◽  
Electric Heating ◽  
Direct Conversion ◽  
Energy Harvesters ◽  
Electromagnetic Heating ◽  
Eddy Current Heating

The area of smart and functional materials, in particular fabrics with electric heating, attracts the attention of researchers. The energy harvesters that convert ambient motion to electricity have greatly developed recently. The paper suggests an eddy current microscale mechanism for direct conversion from ambient motion to heat. The proposed mechanism can be used within fabrics for heating and drying moisture. The principles of eddy current heating and possible design of yarns are described. A fundamental estimation of available thermal energy has been obtained from the general basic consideration.

Embedding metal foam into metal–organic framework monoliths for triggering a highly efficient release of adsorbed atmospheric water by localized eddy current heating

2021 ◽  
Author(s):  
Yingle Tao ◽  
Qiangqiang Li ◽  
Qiannan Wu ◽  
Haiqing Li
Keyword(s):  
Thermal Insulation ◽  
Eddy Current ◽  
Energy Efficient ◽  
Metal Foam ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Atmospheric Water ◽  
Highly Efficient ◽  
Metal Organic ◽  
Eddy Current Heating

Localized eddy current heating delivered by metal foam embedded in a MOF monolith provides a novel, low-cost, and energy efficient way to overcome the thermal insulation nature of MOF monoliths and realize their highly efficient regenerations.

scholarly journals Piezoelectric and electrostatic bimetal-based thermal energy harvesters

2013 ◽  
Vol 476 ◽  
pp. 012062 ◽  
Author(s):  
A Arnaud ◽  
S Boisseau ◽  
S Monfray ◽  
O Puscasu ◽  
G Despesse ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Energy Harvesters

A REVIEW ON EDDY CURRENT THERMOGRAPHY TECHNIQUE FOR NON-DESTRUCTIVE TESTING APPLICATION

2016 ◽  
Vol 78 (11) ◽  
Author(s):  
N. S. Rusli ◽  
I. Z. Abidin ◽  
S. A. Aziz
Keyword(s):  
Defect Detection ◽  
Eddy Current ◽  
Infrared Camera ◽  
Heat Diffusion ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Quantitative Characterisation ◽  
Optimum Heating ◽  
Non Destructive ◽  
Eddy Current Heating

Eddy current thermography is one of the non-destructive testing techniques that provide advantages over other active thermography techniques in defect detection and analysis. The method of defect detection in eddy current thermography has become reliable due to its mode of interactions i.e. eddy current heating and heat diffusion, acquired via an infrared camera. Such ability has given the technique the advantages for non-destructive testing applications. The experimental parameters and settings which contribute towards optimum heating and defect detection capability have always been the focus of research associated with the technique. In addition, the knowledge and understanding of the characteristics heat distribution surrounding a defect is an important factor for successful inspection results. Thus, the quantitative characterisation of defect by this technique is possible compared to the conventional non-destructive which only acquired qualitative result. In this paper, a review of the eddy current thermography technique is presented which covers the physical principles of the technique, associated systems and its applications. Works on the application of the technique have been presented and discussed which demonstrates the ability of eddy current thermography for non-destructive testing of conductive materials.   

Thermal energy harvesters with piezoelectric or electrostatic transducer

2014 ◽  
Author(s):  
Piotr Prokaryn ◽  
Krzysztof Domański ◽  
Michał Marchewka ◽  
Daniel Tomaszewski ◽  
Piotr Grabiec ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Energy Harvesters

Experimental Investigation of Thermoacoustic-Piezoelectric Energy Harvesters and Refrigerators With Dynamic Magnifiers

2013 ◽  
Author(s):  
M. Nouh ◽  
O. Aldraihem ◽  
A. Baz
Keyword(s):  
Temperature Gradient ◽  
Thermal Energy ◽  
Acoustic Waves ◽  
Waste Heat ◽  
Mechanical Impedance ◽  
Acoustic Resonator ◽  
Critical Threshold ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Theoretical Results

Conventional Thermoacoustic-Piezoelectric (TAP) energy harvesters convert thermal energy, such as solar or waste heat energy, directly into electrical energy without the need for any moving components. The input thermal energy generates a steep temperature gradient along a porous medium. At a critical threshold of the temperature gradient, self-sustained acoustic waves are developed inside an acoustic resonator. The associated pressure fluctuations impinge on a piezoelectric diaphragm, placed at the end of the resonator. The reverse phenomenon results in piezo-driven thermoacoustic refrigerators (PDTARs). A pressure wave driven by a piezo-speaker induces a temperature gradient across the porous body. In this study, the TAP harvester and the PDTAR are coupled with auxiliary elastic structures in the form of simple spring-mass systems to enhance their performance. The proposed addition is referred to as a dynamic magnifier and has been shown in different areas to amplify significantly the deflection of vibrating structures. A comprehensive model of the dynamically magnified thermoacoustic-piezoelectric (DMTAP) system has been developed earlier that includes equations of motions of the system’s mechanical components, the harvested voltage, the mechanical impedance of the coupled structure at the resonator end as well as the equations necessary to compute the self-excited frequencies of oscillations inside the acoustic resonator. Theoretical results confirmed significant amplification of the harvested power is feasible if the magnifier’s parameters are properly chosen. The performance of experimental prototypes of a DMTAP harvester and a PDTAR with a dynamic magnifier are examined here. The obtained experimental findings are validated against the theoretical results. Dynamic magnifiers serve as a novel approach to enhance the effectiveness of thermoacoustic energy harvesting and refrigeration.

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