本文采用有限容积法对50种具有不同孔数及排列方式的240×115×90粘土空心砖进行了当量导热系数的三维数值模拟研究.模拟中考虑了粘土空心砖的孔内表面辐射、孔数及排列方式以及室内外温差对其当量导热系数的影响.模拟结果表明:孔内表面辐射对当量导热系数有不可忽略的作用,孔数及排列方式直接影响当量导热系数的值,存在具有最低当量导热系数的粘土空心砖结构.在该结构下空心砖的当量导热系数几乎不随室内外温差的变化而变.模拟结果对粘土空心砖的结构选型、工程设计及建筑节能具有重要的意义.
参考文献
| [1] | Zhao C Y;Tao W Q .Natural Convections in Conjugated Single and Double Enclosures[J].International Journal of Heat and Mass Transfer,1995,30:175-182. |
| [2] | Lorente S;Petit M;Javelas R .Simplified Analytical Model for Thermal Transfer in Vertical Hollow Brick[J].Energy and Buildings,1996,24:95-103. |
| [3] | S. Lorente;M. Petit;R. Javelas .The effects of temperature conditions on the thermal resistance of walls made with different shapes vertical hollow bricks[J].Energy and buildings,1998(3):237-240. |
| [4] | Diaz JJD;Nieto PJG;Rodriguez AM;Martinez-Luengas AL;Biempica CB .Non-linear thermal analysis of light concrete hollow brick walls by the finite element method and experimental validation[J].Applied thermal engineering: Design, processes, equipment, economics,2006(8-9):777-786. |
| [5] | J. J. del Coz Diaz;P. J. Garcia Nieto;C. Betegon Biempica;M. B. Prendes Gero .Analysis and optimization of the heat-insulating light concrete hollow brick walls design by the finite element method[J].Applied thermal engineering: Design, processes, equipment, economics,2007(8-9):1445-1456. |
| [6] | 陶文铨.数值传热学[M].西安:西安交通大学出版社,2001 |
| [7] | Li ZY.;Tao WQ. .A new stability-guaranteed second-order difference scheme[J].Numerical Heat Transfer, Part B. Fundamentals: An International Journal of Computation and Methodology,2002(4):349-365. |
| [8] | Incropera F P;DeWitt D P.Introduction to Heat Transfer[M].New York:John Wiley and Sons,Inc,2003 |
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