A High-Performance Microwave Heating Device Based on a Coaxial Structure
Continuous-flow microwave heating stands out for its ability to rapidly and uniformly heat substances, making it widely applicable in chemical production. However, in practical applications, the permittivity of the heated liquid changes dramatically as the reaction progresses, affecting the efficien...
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| Veröffentlicht in: | Processes 2024-09, Vol.12 (9), p.1942 |
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| creator | Duan, Jintao Xiao, Wei Liu, Guilan Yang, Fengming Zhu, Huacheng Yang, Yang |
| description | Continuous-flow microwave heating stands out for its ability to rapidly and uniformly heat substances, making it widely applicable in chemical production. However, in practical applications, the permittivity of the heated liquid changes dramatically as the reaction progresses, affecting the efficiency and uniformity of continuous-flow heating. Herein, this work presents a novel microwave heating device based on a coaxial structure for high-performance heating. Our approach commenced with the development of a multiphysical field model, incorporating spiraled polytetrafluoroethylene (PTFE) as a water channel and the coaxial waveguide as a container. The analysis shows that the uniform distribution of the sectional electric field of electromagnetic waves in the TEM mode within the coaxial structure can enhance heating uniformity. Then, a continuous-flow microwave heating system for different liquid loads was established, and experimental measurements were conducted. The heating efficiency for all loads exceeded 90%, which basely matched the simulation results, validating the accuracy of the model. Finally, the heating efficiency and uniformity under different permittivity loads were analyzed, as well as the impact of channel radius on heating efficiency. The device exhibits high heating efficiency under different loads, with uniform radial electric field distribution and stable heating uniformity. This continuous-flow microwave device is suitable for chemical research and production because of its high adaptability to the large dynamic range of permittivity, contributing to the promotion of microwave energy applications in the chemical industry. |
| doi_str_mv | 10.3390/pr12091942 |
| format | Article |
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However, in practical applications, the permittivity of the heated liquid changes dramatically as the reaction progresses, affecting the efficiency and uniformity of continuous-flow heating. Herein, this work presents a novel microwave heating device based on a coaxial structure for high-performance heating. Our approach commenced with the development of a multiphysical field model, incorporating spiraled polytetrafluoroethylene (PTFE) as a water channel and the coaxial waveguide as a container. The analysis shows that the uniform distribution of the sectional electric field of electromagnetic waves in the TEM mode within the coaxial structure can enhance heating uniformity. Then, a continuous-flow microwave heating system for different liquid loads was established, and experimental measurements were conducted. The heating efficiency for all loads exceeded 90%, which basely matched the simulation results, validating the accuracy of the model. Finally, the heating efficiency and uniformity under different permittivity loads were analyzed, as well as the impact of channel radius on heating efficiency. The device exhibits high heating efficiency under different loads, with uniform radial electric field distribution and stable heating uniformity. This continuous-flow microwave device is suitable for chemical research and production because of its high adaptability to the large dynamic range of permittivity, contributing to the promotion of microwave energy applications in the chemical industry.</description><identifier>ISSN: 2227-9717</identifier><identifier>EISSN: 2227-9717</identifier><identifier>DOI: 10.3390/pr12091942</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Adaptability ; Analysis ; Chemical industry ; Chemical reactions ; Coaxial waveguides ; Continuous flow ; Efficiency ; Electric fields ; Electric waves ; Electromagnetic radiation ; Electromagnetic waves ; Electromagnetism ; Energy distribution ; Heat ; Heating ; Herbicides ; Impact analysis ; Load matching ; Microwave heating ; Permittivity ; Pesticides industry ; Polytetrafluoroethylene ; Waveguides</subject><ispartof>Processes, 2024-09, Vol.12 (9), p.1942</ispartof><rights>COPYRIGHT 2024 MDPI AG</rights><rights>2024 by the authors. 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/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c223t-e9093c7217c173fb96251522da4059c6598acaadfe7ace5f2b0f85f339749f263</cites><orcidid>0000-0002-1737-870X ; 0000-0003-0764-1575</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids></links><search><creatorcontrib>Duan, Jintao</creatorcontrib><creatorcontrib>Xiao, Wei</creatorcontrib><creatorcontrib>Liu, Guilan</creatorcontrib><creatorcontrib>Yang, Fengming</creatorcontrib><creatorcontrib>Zhu, Huacheng</creatorcontrib><creatorcontrib>Yang, Yang</creatorcontrib><title>A High-Performance Microwave Heating Device Based on a Coaxial Structure</title><title>Processes</title><description>Continuous-flow microwave heating stands out for its ability to rapidly and uniformly heat substances, making it widely applicable in chemical production. 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Finally, the heating efficiency and uniformity under different permittivity loads were analyzed, as well as the impact of channel radius on heating efficiency. The device exhibits high heating efficiency under different loads, with uniform radial electric field distribution and stable heating uniformity. This continuous-flow microwave device is suitable for chemical research and production because of its high adaptability to the large dynamic range of permittivity, contributing to the promotion of microwave energy applications in the chemical industry.</description><subject>Adaptability</subject><subject>Analysis</subject><subject>Chemical industry</subject><subject>Chemical reactions</subject><subject>Coaxial waveguides</subject><subject>Continuous flow</subject><subject>Efficiency</subject><subject>Electric fields</subject><subject>Electric waves</subject><subject>Electromagnetic radiation</subject><subject>Electromagnetic waves</subject><subject>Electromagnetism</subject><subject>Energy distribution</subject><subject>Heat</subject><subject>Heating</subject><subject>Herbicides</subject><subject>Impact analysis</subject><subject>Load matching</subject><subject>Microwave heating</subject><subject>Permittivity</subject><subject>Pesticides industry</subject><subject>Polytetrafluoroethylene</subject><subject>Waveguides</subject><issn>2227-9717</issn><issn>2227-9717</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpNUE1LAzEQDaJgqb34CwLehK352N1sjrV-rKAoqOdlmp3UlHZTk92q_95IBZ3LDDPvveE9Qk45m0qp2cU2cME017k4ICMhhMq04urw33xMJjGuWCrNZVWUI1LPaO2Wb9kTBuvDBjqD9MGZ4D9gh7RG6F23pFe4c-lwCRFb6jsKdO7h08GaPvdhMP0Q8IQcWVhHnPz2MXm9uX6Z19n94-3dfHafGSFkn6FmWholuDJcSbvQpSh4IUQLOSu0KQtdgQFoLSowWFixYLYqbPKncm1FKcfkbK-7Df59wNg3Kz-ELr1sJOesLCte8oSa7lFLWGPjOuv7kHQNtLhxxndoXdrPKs4qWUmdJ8L5npCsxxjQNtvgNhC-Gs6an3Sbv3TlN2MLahw</recordid><startdate>20240901</startdate><enddate>20240901</enddate><creator>Duan, Jintao</creator><creator>Xiao, Wei</creator><creator>Liu, Guilan</creator><creator>Yang, Fengming</creator><creator>Zhu, Huacheng</creator><creator>Yang, Yang</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>LK8</scope><scope>M7P</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><orcidid>https://orcid.org/0000-0002-1737-870X</orcidid><orcidid>https://orcid.org/0000-0003-0764-1575</orcidid></search><sort><creationdate>20240901</creationdate><title>A High-Performance Microwave Heating Device Based on a Coaxial Structure</title><author>Duan, Jintao ; 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| subjects | Adaptability Analysis Chemical industry Chemical reactions Coaxial waveguides Continuous flow Efficiency Electric fields Electric waves Electromagnetic radiation Electromagnetic waves Electromagnetism Energy distribution Heat Heating Herbicides Impact analysis Load matching Microwave heating Permittivity Pesticides industry Polytetrafluoroethylene Waveguides |
| title | A High-Performance Microwave Heating Device Based on a Coaxial Structure |
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