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- 저자 : Wenbin Zou (검색결과 2 건)
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Study on dryout heat flux of axial stratified debris bed under top-flooding
Wenbin Zou,Lili Tong,Xuewu Cao Korean Nuclear Society 2024 Nuclear Engineering and Technology Vol.56 No.2
The coolability of the debris bed with a simulant of solidified corium is experimentally studied, focusing on the effects of the structure of the axial stratified debris bed on the dryout heat flux (DHF). DHF was obtained for the four structures with different particle sizes for the axial stratified debris bed under top flooding. The experimental results show that the dryout position of the axial stratified debris bed is formed at the stratified interface indicated by the temperature rise, and the DHF of the axial stratified bed is much lower than that of the homogeneous bed packed with the upper small particles. To predict the dryout heat flux of the stratified debris beds, by considering the properties of the mixed area, a one-dimensional dryout heat flux model of the porous medium is derived from a water and vapor momentum equation for porous medium, two-phase permeability modifications, interfacial drag, and the correlation between capillary pressure and liquid saturation and verified with the experimental data. The modified model can give reasonable results under different structures.
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Danhui Zhang,Wenbin Zou 한국물리학회 2013 Current Applied Physics Vol.13 No.8
In this paper, a composite of reduced graphene oxide decorated by Co3O4 hollow spheres (Co3O4/RGO composite) has been synthesized by a one-pot solvothermal method. The samples are characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR), Raman spectra and so on. The results demonstrate that the Co3O4 hollow spheres with good purity and homogenous size are absorbed onto the reduced graphene oxide sheets as spacers to prevent the aggregation of the graphene oxide sheets. Furthermore, the well electrochemical properties demonstrate that the Co3O4/RGO composite might have potential applications as electrode materials for supercapacitors.
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