TY - JOUR
T1 - Numerical analysis of microwave heating cavity
T2 - Combining electromagnetic energy, heat transfer and fluid dynamics for a NaY zeolite fixed-bed
AU - Nigar, H.
AU - Sturm, G. S.J.
AU - Garcia-Baños, B.
AU - Peñaranda-Foix, F. L.
AU - Catalá-Civera, J. M.
AU - Mallada, R.
AU - Stankiewicz, A.
AU - Santamaría, J.
PY - 2019
Y1 - 2019
N2 -
Three-dimensional mathematical model was developed for a rectangular TE
10n
microwave heating cavity system, working at 2.45 GHz. Energy/heat, momentum equations were solved together with Maxwell's electromagnetic field equations using COMSOL MULTIPHYSICS® simulation environment. The dielectric properties, ε' and ε'', of NaY zeolite (Si/Al = 2.5) were evaluated as a function of temperature. Considering these values, the microwave heating of a porous fixed-bed made of dry NaY zeolite was simulated. Electric field distribution, axial and radial temperature profiles and temperature evolution with time were obtained. The zeolite fixed bed was heated up to 180 °C in 5 min, with 30 W power. The fixed-bed temperature evolution under non-steady state conditions showed the same trend as the one observed experimentally with only an average deviation of 10.3%. The model was used to predict microwave heating of other materials improving energy efficiency of the microwave cavity. Furthermore, the developed model was able to predict thermal runaway for zeolites.
AB -
Three-dimensional mathematical model was developed for a rectangular TE
10n
microwave heating cavity system, working at 2.45 GHz. Energy/heat, momentum equations were solved together with Maxwell's electromagnetic field equations using COMSOL MULTIPHYSICS® simulation environment. The dielectric properties, ε' and ε'', of NaY zeolite (Si/Al = 2.5) were evaluated as a function of temperature. Considering these values, the microwave heating of a porous fixed-bed made of dry NaY zeolite was simulated. Electric field distribution, axial and radial temperature profiles and temperature evolution with time were obtained. The zeolite fixed bed was heated up to 180 °C in 5 min, with 30 W power. The fixed-bed temperature evolution under non-steady state conditions showed the same trend as the one observed experimentally with only an average deviation of 10.3%. The model was used to predict microwave heating of other materials improving energy efficiency of the microwave cavity. Furthermore, the developed model was able to predict thermal runaway for zeolites.
KW - Dielectric properties
KW - Microwave heating
KW - Modelling and numerical simulation
KW - Power dissipation
KW - Transient temperature profiles
UR - http://www.scopus.com/inward/record.url?scp=85063763159&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2019.03.117
DO - 10.1016/j.applthermaleng.2019.03.117
M3 - Article
AN - SCOPUS:85063763159
VL - 155
SP - 226
EP - 238
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
SN - 1359-4311
ER -
