Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequencies

[EN] The proper use of microwave heating can significantly increase the production cycle time and energy efficiency in industrial heating processes compared to conventional heating methods. The main challenge of this technique is to improve the temperature uniformity in the product exposed to standi...

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Detalhes bibliográficos
Autores: Neumaier, Dominik, Sanseverino, Sabrina, Link, Guido, Jelonnek, John
Tipo de documento: capítulo de livro
Data de publicação:2019
País:España
Recursos:Universitat Politècnica de València (UPV)
Repositório:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglês
OAI Identifier:oai:riunet.upv.es:10251/130717
Acesso em linha:https://riunet.upv.es/handle/10251/130717
Access Level:Acceso aberto
Palavra-chave:Energy Production by Microwaves
Microwave CVD
EM Modelling
Microwave Material interaction
Dielectric Properties
Dielectric Properties Measurement
Solid State Microwave
Microwave Processing
Microwave Chemistry
Microwave applicators design
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spelling Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequenciesNeumaier, DominikSanseverino, SabrinaLink, GuidoJelonnek, JohnEnergy Production by MicrowavesMicrowave CVDEM ModellingMicrowave Material interactionDielectric PropertiesDielectric Properties MeasurementSolid State MicrowaveMicrowave ProcessingMicrowave ChemistryMicrowave applicators design[EN] The proper use of microwave heating can significantly increase the production cycle time and energy efficiency in industrial heating processes compared to conventional heating methods. The main challenge of this technique is to improve the temperature uniformity in the product exposed to standing waves inside the microwave oven. In opposite to the magnetron, solid-state amplifiers (SSA) offer the possibility to increase the homogeneity by changing the amplitude, frequency and phase with the help of intelligent control methods [1]. In this work, the variation of the frequency and the amplitude of the SSA is considered. The multimode microwave oven used in the experiment has an industrial size of 535 mm x 510 mm x 395 mm (Figure 1). The SSA was operated in the frequency range from 2.4 GHz to 2.5 GHz. It consisted of a new 300 W solid state microwave source from HBH microwave GmbH, Germany. An antenna system was developed based on numerical simulation with CST Microwave Studio. The positions of four loop antennas were optimized to excite at least 90 % of the possible 32 eigenmodes [2] of the unloaded cavity. At the roof of the cavity, an IR camera was installed to observe the temperature distribution of the load during heating. A sheet of paper was used as the thermal load. It was placed on a PTFE plate as a sample holder. Figure 1 exemplary illustrates the comparison of the simulated power distribution with the measured temperature distribution for two representative eigenmodes. As can be expected from the figures, an optimized combination of different modes will lead to a significantly improved temperature uniformity in the material. Latest results obtained with different type of loads will be presented.The authors acknowledge the financial support by the Federal Ministry for Economic Affairs and Energy of Germany in the project ZF4204602PR6.Editorial Universitat Politècnica de ValènciaBundesministerium für Wirtschaft und Energie, AlemaniaRepositorio Institucional de la Universitat Politècnica de València Riunet20192019-10-15book parthttp://purl.org/coar/resource_type/c_3248VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/bookPartapplication/pdfhttps://riunet.upv.es/handle/10251/130717reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengBundesministerium für Wirtschaft und Energie, Alemania https://doi.org/10.13039/501100006360 ZF4204602PR6open accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/1307172026-06-13T07:49:27Z
dc.title.none.fl_str_mv Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequencies
title Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequencies
spellingShingle Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequencies
Neumaier, Dominik
Energy Production by Microwaves
Microwave CVD
EM Modelling
Microwave Material interaction
Dielectric Properties
Dielectric Properties Measurement
Solid State Microwave
Microwave Processing
Microwave Chemistry
Microwave applicators design
title_short Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequencies
title_full Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequencies
title_fullStr Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequencies
title_full_unstemmed Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequencies
title_sort Homogeneous dielectric heating in large microwave ovens by excitation of multiple eigenmodes at their resonance frequencies
dc.creator.none.fl_str_mv Neumaier, Dominik
Sanseverino, Sabrina
Link, Guido
Jelonnek, John
author Neumaier, Dominik
author_facet Neumaier, Dominik
Sanseverino, Sabrina
Link, Guido
Jelonnek, John
author_role author
author2 Sanseverino, Sabrina
Link, Guido
Jelonnek, John
author2_role author
author
author
dc.contributor.none.fl_str_mv Bundesministerium für Wirtschaft und Energie, Alemania
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Energy Production by Microwaves
Microwave CVD
EM Modelling
Microwave Material interaction
Dielectric Properties
Dielectric Properties Measurement
Solid State Microwave
Microwave Processing
Microwave Chemistry
Microwave applicators design
topic Energy Production by Microwaves
Microwave CVD
EM Modelling
Microwave Material interaction
Dielectric Properties
Dielectric Properties Measurement
Solid State Microwave
Microwave Processing
Microwave Chemistry
Microwave applicators design
description [EN] The proper use of microwave heating can significantly increase the production cycle time and energy efficiency in industrial heating processes compared to conventional heating methods. The main challenge of this technique is to improve the temperature uniformity in the product exposed to standing waves inside the microwave oven. In opposite to the magnetron, solid-state amplifiers (SSA) offer the possibility to increase the homogeneity by changing the amplitude, frequency and phase with the help of intelligent control methods [1]. In this work, the variation of the frequency and the amplitude of the SSA is considered. The multimode microwave oven used in the experiment has an industrial size of 535 mm x 510 mm x 395 mm (Figure 1). The SSA was operated in the frequency range from 2.4 GHz to 2.5 GHz. It consisted of a new 300 W solid state microwave source from HBH microwave GmbH, Germany. An antenna system was developed based on numerical simulation with CST Microwave Studio. The positions of four loop antennas were optimized to excite at least 90 % of the possible 32 eigenmodes [2] of the unloaded cavity. At the roof of the cavity, an IR camera was installed to observe the temperature distribution of the load during heating. A sheet of paper was used as the thermal load. It was placed on a PTFE plate as a sample holder. Figure 1 exemplary illustrates the comparison of the simulated power distribution with the measured temperature distribution for two representative eigenmodes. As can be expected from the figures, an optimized combination of different modes will lead to a significantly improved temperature uniformity in the material. Latest results obtained with different type of loads will be presented.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-10-15
dc.type.none.fl_str_mv book part
http://purl.org/coar/resource_type/c_3248
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/bookPart
format bookPart
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/130717
url https://riunet.upv.es/handle/10251/130717
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Bundesministerium für Wirtschaft und Energie, Alemania https://doi.org/10.13039/501100006360 ZF4204602PR6
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Editorial Universitat Politècnica de València
publisher.none.fl_str_mv Editorial Universitat Politècnica de València
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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