Convection Heat Transfer Active Enhancement by Magnetically Induced Longitudinal Vortices

Yang, Lijun; Ren, Jing; Du, Xuzhi; Liu, D. Y.; Yang, Y. P.

doi:10.1615/ihtc13.p17.30

Cited by 3 publications

(6 citation statements)

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“…The lump coal was placed in a high temperature furnace whose temperature T f is always 1000°C, The heat is transferred through the stainless container between the coal char and the air in the furnace. The thermal conductivity λ of stainless steel 11 is about 16 W m −1 K −1 which is much higher than the coal. Regardless of heat resistance of the stainless container, it was assumed that the air temperature was also 1000°C.…”

Section: Relation Between Coal Performance and Internal Temperaturementioning

confidence: 95%

“…Basic physical characteristic parameters: 11–14 when T ≤673 K, λ = 0.23 W m −1 K −1 , when T >673 K, λ = 0.23+2.24×10 −5 ( T −673) 1.8 W m −1 K −1 ; when T ≤623 K, c P = 1254 J kg −1 K −1 , when T >623 K, c p = 1254−1.75( T −623) J kg −1 K −1 ; the equivalent radius of the lump coal , the weight and density of the solid products were measured by experiment; the heat transfer coefficient α of air is about 5–10 W m −2 K −1 under the condition of natural convection, 15 the test was performed in the stationary air, then the interfacial heat transfer coefficient between the air and solid products was set as α = 8 W m −2 K −1 .…”

Section: Relation Between Coal Performance and Internal Temperaturementioning

confidence: 99%

“…The first item in the infinite series of the analytical solution was only singled out for convenient calculation 11 …”

Section: Relation Between Coal Performance and Internal Temperaturementioning

confidence: 99%

“…The sum of the absorbed heat between initial time and the moment when it reached heat balance could be expressed as 11,12 …”

Section: Relation Between Coal Performance and Internal Temperaturementioning

confidence: 99%

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Investigation of coal properties to avoid lump coal fines generation in COREX process

Liu

She

et al. 2014

Ironmaking & Steelmaking

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Fines generation of lump coal is a most important limiting factor for efficient production in the COREX process. In this paper, the fines generation of lump coal has been examined based on simulation experiments of the relationships of coal char conversion with temperature and heat absorption. According to the results, in the early stage of coke formation in the melter gasifier, lump coal absorbs large amounts of heat but without significant increase in its high temperature strength. Strength was only improved at later stages of the coke forming process. Residual coal was also found in most tuyere coke samples illustrating that the lump coals added to the melter gasifier were not completely transformed into coke when they arrived at tuyere region. An improvement in the high temperature performance of lump coal is speculated be limited in the melting gasifier due to the low coke forming rate which could become the core factor of fines generation of lump coal in the melting gasifier. Thus, we suggest preheating the lump coal before it is added to the melting gasifier as a solution.

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Section: Relation Between Coal Performance and Internal Temperaturementioning

confidence: 95%

Section: Relation Between Coal Performance and Internal Temperaturementioning

confidence: 99%

“…The first item in the infinite series of the analytical solution was only singled out for convenient calculation 11 …”

Section: Relation Between Coal Performance and Internal Temperaturementioning

confidence: 99%

“…The sum of the absorbed heat between initial time and the moment when it reached heat balance could be expressed as 11,12 …”

Section: Relation Between Coal Performance and Internal Temperaturementioning

confidence: 99%

See 2 more Smart Citations

Investigation of coal properties to avoid lump coal fines generation in COREX process

Liu

She

et al. 2014

Ironmaking & Steelmaking

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“…The convective heat transfer coefficient h can be obtained through the experimental equation ( 5) [10] of the vertical sandwich model of natural convection heat transfer in a limited space, and equation ( 6) of the convective heat transfer coefficient solution.…”

mentioning

confidence: 99%

Simulation analysis of temperature field characteristics of fast nucleic acid analyzer based on finite element method

Li,

Ren,

Chen

et al. 2023

Third International Conference on Mechanical Design and Simulation (MDS 2023)

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Fast nucleic acid analyzer has developed rapidly recently due to the spread of COVID-19 virus. In order to calibrate the temperature parameters of fast nucleic acid analyzer, it is necessary to study its temperature field distribution and temperature change curve, so as to put forward a scientific and accurate temperature field simulation model. This article studies the heat transfer mechanism of the heating module of the fast nucleic acid analyzer based on the finite element method by using CATIA three-dimensional modeling software and ANSYS Meshing platform, and the dynamic simulation model of the temperature field is obtained by studying two typical types of fast nucleic acid analyzers. Thus, this article provides a basis for the research on the calibration device of the fast nucleic acid analyzer, and the simulation model can be used to verify the reliability of the calibration device.

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The Electromagnetic and Thermal Analysis of Permanent Magnet Brushless DC Motor in Cars

Qin

Liu

et al. 2012

AMR

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As the wide application of DC brushless motor in cars, this paper introduces a kind of motor design method that based on finite element theory. The motor electromagnetic simulation is analyzed by using finite element termed as Ansoft, the simulation results and experimental data are anastomotic, so the method is verified feasible. The motor in cars is restricted to the volume, the motor temperature index influence all basic parameters seriously, in this paper baseing on the motor loss simulate the motor 3D temperature distribution, and find out the highest spot, for designing the cooling system of similar motors provide instructional effect, and this is of important engineering significance.

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Convection Heat Transfer Active Enhancement by Magnetically Induced Longitudinal Vortices

Cited by 3 publications

References 0 publications

Investigation of coal properties to avoid lump coal fines generation in COREX process

Investigation of coal properties to avoid lump coal fines generation in COREX process

Simulation analysis of temperature field characteristics of fast nucleic acid analyzer based on finite element method

The Electromagnetic and Thermal Analysis of Permanent Magnet Brushless DC Motor in Cars

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