本文对超临界压力二氧化碳在烧结多孔介质的竖直圆管中的对流换热进行了实验研究.分析了入口温度超过准临界温度、颗粒直径为0.2~0.28 mm的多孔圆管中,压力、流量、热流密度以及流动方向对超临界二氧化碳对流换热的影响.结果表明,准临界点附近剧烈变物性的影响使得超临界二氧化碳在多孔结构中的对流换热非常复杂.对流换热随着温度远离准临界温度和热流密度的增加不断减弱;流量对对流换热的影响比较复杂.在准临界温度附近,浮升力对换热有一定的影响.
参考文献
[1] | M Kaviany.Principles of Heat Transfer in Porous Media[M].New York:Springer-Verlag Inc,1991 |
[2] | 林瑞泰.多孔介质传热传质引论[M].北京:科学出版社,1995 |
[3] | M. Jamialahmadi;H. Mueller-Steinhagen;M.R. Izadpanah .Pressure drop, gas hold-up and heat transfer during single and two-phase flow through porous media[J].International journal of heat and fluid flow,2005(1):156-172. |
[4] | E Achenbach .Heat and Flow Characteristics of Packed Beds[J].Experimental Thermal and Fluid Science,1995,10(01):17-27. |
[5] | A. Haji-Sheikh .Estimation of Average and Local Heat Transfer in Parallel Plates and Circular Ducts Filled With Porous Materials[J].Journal of heat transfer: Transactions of the ASME,2004(3):400-409. |
[6] | Pei-Xue Jiang;Meng Li;Tian-Jian Lu;Lei Yu;Ze-Pei Ren .Experimental research on convection heat transfer in sintered porous plate channels[J].International Journal of Heat and Mass Transfer,2004(10/11):2085-2096. |
[7] | Jiang PX;Si GS;Li M;Ren ZP .Experimental and numerical investigation of forced convection heat transfer of air in non-sintered porous media[J].Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics,2004(6):545-555. |
[8] | Pei-Xue Jiang;Yi-Jun Xu;Jing Lv;Run-Fu Shi;S. He;J. D. Jackson .Experimental investigation of convection heat transfer of CO_2 at super-critical pressures in vertical mini-tubes and in porous media[J].Applied thermal engineering: Design, processes, equipment, economics,2004(8-9):1255-1270. |
[9] | Dostal V;Driscoll M J;Hejzlar P.Supercritical CO2 cycle for Fast Gas-Cooled Reactors.GT2004-54242[A].Vienna,Austria,2004 |
[10] | Romney B. Duffey;Igor L. Pioro .Experimental heat transfer of supercritical carbon dioxide flowing inside channels (survey)[J].Nuclear engineering and design,2005(8):913-924. |
[11] | 王娟,冯坚,杨大祥,张长瑞.纳米多孔二氧化硅薄膜的制备与表征[J].功能材料,2005(01):54-56. |
[12] | 王宝和,于才渊,王喜忠.纳米多孔材料的超临界干燥新技术[J].化学工程,2005(02):13-17. |
[13] | 姜培学,李勐,徐轶君,任泽霈.多孔介质中超临界C O2对流换热数值模拟[J].工程热物理学报,2002(02):200-202. |
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