Numerical and experimental study on heat transfer process under microwave irradiation using reflector to enhance energy absorption rate

M. Kumja*, Ng Kim Choon, Wai Soong Loh, Christopher Yap

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

With the energy saving concerns, microwave heating method becomes much attention in heating process of various applications. Depending on applicator geometry design, type of work load, and position in a microwave heating system, it can save energy 20% to 40% more than the energy consumed by a conventional heating method. However, it is difficult to achieve this energy saving for low dielectric constant workload that cannot perform as a self-dielectric resonator (DR) load. This paper aspires to propose a new method of inserting reflector into the low dielectric constant load to enhance energy absorption rate under the microwave irradiation process. The spatial electromagnetic fields (E-field and H-field) patterns of this workload and applicator were simulated with the commercial HFSS software. By using the Poynting vector theorem, the dissipation power intensity can be calculated from the electromagnetic field and it is integrated to the second order heat transfer equation. The numerical temperature distribution result was resemblance with the experimental result. From both numerical and experimental results, the energy absorption rate of workload can be improved obviously by using a reflector as compared to the rate without using the reflector for low dielectric constant.

Original languageEnglish (US)
Title of host publication2008 Proceedings of the ASME Summer Heat Transfer Conference, HT 2008
Pages59-65
Number of pages7
Volume1
StatePublished - 2009
Externally publishedYes
Event2008 ASME Summer Heat Transfer Conference, HT 2008 - Jacksonville, FL, United States
Duration: Aug 10 2008Aug 14 2008

Other

Other2008 ASME Summer Heat Transfer Conference, HT 2008
CountryUnited States
CityJacksonville, FL
Period08/10/0808/14/08

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

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