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Author: search.filters.author.Pintavirooj, C.Subject: search.filters.subject.Heat transfer

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    Analysis of heat transfer and specific absorption rate of electromagnetic field in human body at 915 MHz and 2.45 GHz with 3D finite element method
    (2012-12-01)
    Suwansin, W.
    ;
    Phasukkit, P.
    ;
    Pintavirooj, C.
    ;
    Sanpanich, A.
    This paper presents 3D finite element analysis for heat transfer and specific absorption rate of electromagnetic field in human body at 915 MHz and 2.45 GHz. The purpose of this research is to study the effects and harmfulness of leakage electromagnetic field to organ in living tissue. We propose a simulation of microwave radiation by using a finite element method (FEM) to our system for studying heat transfer and specific absorption rate of electromagnetic field in multi-organs living tissue. Electromagnetic wave distribution source in our system was designed as a microstrip type and placed at 5 cm from multi-organs living tissue model. As a preliminary, leakage power was assumed at 100 W and exposure time was 1800 s. The result from finite element method show distribution of electromagnetic field in 3D air space of multi-organs tissue model , specific absorption rate (SAR) and temperature. The SAR value will be followed the standard of ICNIRP (1998) and the results at 915 MHz and 2.45 GHz shown that maximum temperature in organs are different if frequencies different, in 3D model can be obtained every point of view and benefit for development protection system in near future. ©2012 IEEE.
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    3D finite element analysis of heat transfer efficiency in double wall infant incubator
    (2012-12-01)
    Wongkamhang, A.
    ;
    Phasukkit, P.
    ;
    Airphaiboon, S.
    ;
    Pintavirooj, C.
    ;
    Thongpance, N.
    This paper presents a study of heat transfer efficiency in double wall infant incubator by using 3D finite element method. Double wall infant incubator was modeled by using general CAD program then FEM analysis was implemented based on heat transfer and fluid dynamic principle. Real temperature measurement also performed to validate our simulation by using a general infant incubator and an infant incubator analyzer. Real experimental data at each 4 monitoring points and simulation data provide a small difference in temperature. In the future work, infant model should be included into our incubator in order to estimate a heat source effect from newborn baby. ©2012 IEEE.
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    Heat transfer efficiency analysis of infant radiant warmer by 3D finite element method
    (2012-12-01)
    Roongprasert, K.
    ;
    Phasukkit, P.
    ;
    Airphaiboon, S.
    ;
    Pintavirooj, C.
    ;
    Thongpance, N.
    This paper presents heat transfer from infrared element source from infant radiant warmer. The principles of thermal radiate using three-dimensional finite element methods is show the efficiency and effect of Infant radiant warmer. In the design of the system has to model the underlying reality of the infant radiant warmer are used for Simulation results were similar to reality as possible. The simulation results of thermal radiation from the infrared lamp to mattress by using the three-dimensional finite element methods simulation as close to the true result. The results come in the form of temperature, temperature gradient and the direction of heat radiation into the mattress. The result can be that the effects of radiation on the skin of newborns using infant radiant warmer treatment. The results of the analysis of the principle of three-dimensional finite element methods then try to make it easy to design infant radiant warmer effective for use with newborns up. ©2012 IEEE.