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Thermal Management of Serpentine Flexible Heater Based on the Orthotropic Heat Conduction Model

Flexible heaters can perfectly fit with undevelopable surfaces for heating in many practical applications such as thermotherapy, defogging/deicing systems and warming garments. Considering the requirement for stretchability in a flexible heater, certain spacing needs to be retained between serpentin...

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Detalles Bibliográficos
Autores principales: Zhao, Zhao, Nan, Jin, Li, Min
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9025186/
https://www.ncbi.nlm.nih.gov/pubmed/35457926
http://dx.doi.org/10.3390/mi13040622
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author Zhao, Zhao
Nan, Jin
Li, Min
author_facet Zhao, Zhao
Nan, Jin
Li, Min
author_sort Zhao, Zhao
collection PubMed
description Flexible heaters can perfectly fit with undevelopable surfaces for heating in many practical applications such as thermotherapy, defogging/deicing systems and warming garments. Considering the requirement for stretchability in a flexible heater, certain spacing needs to be retained between serpentine heat sources for deformation which will inevitably bring critical challenges to the thermal uniformity. In order to reconcile these two conflicting aspects, a novel method is proposed by embedding the serpentine heat source in orthotropic layers to achieve comprehensive performance in stretchability and uniform heating. Such a scheme takes advantage of the ability of orthotropic material to control the heat flow distribution via orthotropic thermal conductivity. In this paper, an analytical heat conduction model with orthotropic substrate and encapsulation is calculated using Fourier cosine transform, which is validated by finite element analysis (FEA). Meanwhile, the effects of the orthotropic substrate or encapsulation with different ratios of thermal conductivity and the geometric spacing on the thermal properties are investigated, which can help guide the design and fabrication of flexible heaters to achieve the goal of uniform heating.
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spelling pubmed-90251862022-04-23 Thermal Management of Serpentine Flexible Heater Based on the Orthotropic Heat Conduction Model Zhao, Zhao Nan, Jin Li, Min Micromachines (Basel) Article Flexible heaters can perfectly fit with undevelopable surfaces for heating in many practical applications such as thermotherapy, defogging/deicing systems and warming garments. Considering the requirement for stretchability in a flexible heater, certain spacing needs to be retained between serpentine heat sources for deformation which will inevitably bring critical challenges to the thermal uniformity. In order to reconcile these two conflicting aspects, a novel method is proposed by embedding the serpentine heat source in orthotropic layers to achieve comprehensive performance in stretchability and uniform heating. Such a scheme takes advantage of the ability of orthotropic material to control the heat flow distribution via orthotropic thermal conductivity. In this paper, an analytical heat conduction model with orthotropic substrate and encapsulation is calculated using Fourier cosine transform, which is validated by finite element analysis (FEA). Meanwhile, the effects of the orthotropic substrate or encapsulation with different ratios of thermal conductivity and the geometric spacing on the thermal properties are investigated, which can help guide the design and fabrication of flexible heaters to achieve the goal of uniform heating. MDPI 2022-04-15 /pmc/articles/PMC9025186/ /pubmed/35457926 http://dx.doi.org/10.3390/mi13040622 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Zhao
Nan, Jin
Li, Min
Thermal Management of Serpentine Flexible Heater Based on the Orthotropic Heat Conduction Model
title Thermal Management of Serpentine Flexible Heater Based on the Orthotropic Heat Conduction Model
title_full Thermal Management of Serpentine Flexible Heater Based on the Orthotropic Heat Conduction Model
title_fullStr Thermal Management of Serpentine Flexible Heater Based on the Orthotropic Heat Conduction Model
title_full_unstemmed Thermal Management of Serpentine Flexible Heater Based on the Orthotropic Heat Conduction Model
title_short Thermal Management of Serpentine Flexible Heater Based on the Orthotropic Heat Conduction Model
title_sort thermal management of serpentine flexible heater based on the orthotropic heat conduction model
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9025186/
https://www.ncbi.nlm.nih.gov/pubmed/35457926
http://dx.doi.org/10.3390/mi13040622
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