Thermal Conductivity of Cementing Conductive Cement in Medium and Deep Geothermal Well
FANG Yao, ZHANG Yong, RAN Zhenzhen
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
Abstract: The cement-based material with a higher thermal conductivity plays an essential role for the efficient and stable operation of geothermal well. To solve the problem of low thermal conductivity of cement-based materials in geothermal well, the thermal conductivity model of cement for medium and deep geothermal well is established on the basis of previous studies. The effects of quartz powder and alumina powder on thermal conductivity of cement-based materials are studied experimentally in this work. The influence of volume fraction, particle shape and particle size of filling material on thermal conductivity of cement-based materials is studied by the numerical simulation. The results show that after adding quartz powder and alumina powder, the thermal conductivity of cement-based materials is improved to some extent. According to the model, the upper limit of thermal conductivity of cement-based materials is established. With the increase of volume fraction of filling materials, the thermal conductivity increases continuously. Improvement of thermal conductivity by filling spherical particles is worse than cubic ones. Adding small particles with small particle size helps to improve the thermal conductivity of cement-based materials. In addition, the reasonable mix of filler particle sizes can make the same filler ratio achieve different thermal conductivity enhancement effects.When the particle shape of filling materials is the same or the particle size of filling materials is different, the enhancement effect of thermal conductivity is related to the distribution of filling materials.
1 Hu J W, Yan J H, Wang S J. Environmental Protection, 2018, 46(8),45(in Chinese). 胡俊文, 闫家泓, 王社教. 环境保护, 2018, 46(8),45. 2 Poullikkas A. Energy Policy, 2009, 37(9),3673. 3 Glassley G, William E. Geothermal energy-renewable energy and the environment, CRC Press, 2010. 4 Zhang J Y. Science and Technology Innovation Herald, 2017, 14(36),44(in Chinese). 张家云. 科技创新导报, 2017, 14(36),44. 5 Zhang L, Li D G. Journal of Zhengzhou University (Natural Science Edition), 2006, 38(1),105(in Chinese). 张雷, 李冬光. 郑州大学学报(理学版), 2006, 38(1),105. 6 Yan G, Wei B R, Yang H T, et al. Fiber Reinforced Plastics/Compo-sites, 2006(3),50(in Chinese). 闫刚, 魏伯荣, 杨海涛, 等. 玻璃钢/复合材料, 2006(3),50. 7 Zhang W P, Xing Y S, Gu X L. Structural Engineers, 2012, 28(2),39(in Chinese). 张伟平, 邢益善, 顾祥林. 结构工程师,2012,28(2),39. 8 Liu J H, Xu S L, Zeng Q. Journal of Building Materials, 2018, 21(2),293(in Chinese). 刘嘉涵, 徐世烺, 曾强. 建筑材料学报, 2018, 21(2),293. 9 Wang L C, Chang Z, Bao J W. Journal of Hydraulic Engineering, 2017, 48(7),765(in Chinese). 王立成, 常泽, 鲍玖文. 水利学报, 2017, 48(7),765. 10 Hai R, Bian Y D, Wu K R. Concrete, 2009(7),55(in Chinese). 海然, 边亚东, 吴科如. 混凝土, 2009(7),55. 11 Wen L M, Wang Q, Song P. Solar Energy, 2012(23),37(in Chinese). 温乐明, 王琦, 宋鹏. 太阳能, 2012(23),37. 12 Yuan W Y, Zhang X L, Hua W S, et al. Chemical Industry and Engineering Progress, 2018, 37(11),4405(in Chinese). 袁维烨, 章学来, 华维三, 等. 化工进展, 2018, 37(11),4405. 13 Shi T F, Li S Z, Zhang W X, et al. Materials Science and Engineering,1994(3),8(in Chinese). 石彤非, 李树忠, 张万喜, 等. 高分子材料科学与工程, 1994(3),8. 14 赵海涛, 吴胜兴, 魏珍中,等. 中国专利,CN103115942A, 2013. 15 Chen Y X. Qinghai Jiaotong Keji, 2013(3),5(in Chinese). 陈永霞. 青海交通科技, 2013(3),5. 16 Hansen C. Materials & Structures, 1986, 19(6),423.17 Zhang P, Xuan Y M, Li Q. Journal of Chemical Industry and Enginee-ring,2012, 63(2),335(in Chinese). 张平, 宣益民, 李强. 化工学报, 2012, 63(2),335. 18 Yang J X, Pang X M, Zhou J Q, et al. Mechanical and Electrical Engineering, 2016, 33(8),973(in Chinese). 杨晶歆, 庞旭明, 周剑秋. 机电工程, 2016, 33(8),973. 19 Li B,Liu Q. Plastics Additives, 2008(3),14(in Chinese). 李冰, 刘琴. 塑料助剂, 2008(3),14. 20 Xiao J Z, Song Z W, Zhang F. Journal of Building Materials, 2010, 13(1),17(in Chinese). 肖建庄, 宋志文, 张枫. 建筑材料学报, 2010, 13(1),17. 21 Qomi M J A, Ulm F J, Pellenq J M. Physical Review Applied, 2015, 3(6),64010.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2020, Vol. 34 
