人工冻结中HDPE同轴管换热器的传热研究  被引量:1

Heat transfer of HDPE coaxial-tube heat exchanger in artificial freezing

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作  者:赵大军[1] 张金宝[1] 赵研[1] 段会军 李颖[3] 

机构地区:[1]吉林大学建设工程学院,吉林长春130026 [2]中国煤炭科工集团西安研究院,陕西西安710077 [3]东北师范大学生命科学学院,吉林长春130024

出  处:《中南大学学报(自然科学版)》2014年第4期1190-1196,共7页Journal of Central South University:Science and Technology

基  金:国家潜在油气资源(油页岩勘探开发利用)产学研用合作创新研究项目(22110BH34424);高等学校博士学科点专项科研基金资助项目(20130061120080)

摘  要:为了研究人工冻结过程中HDPE同轴管换热器的传热性能,在建立同轴管换热器物理模型的基础上,选择V.C.Mei传热模型对其进行数值分析,并利用ANSYS fluent模块进行人工冻土中温度场变化情况的数值模拟;同时利用自行设计的人工模拟土体冻结试验装置和HDPE同轴管换热器,对长春地区的原位取样黏土进行236 h的人工冻结试验,得到地下温度场的变化规律,与模拟数据进行分析比较,表明理论分析与实验结果吻合度较好。研究结果表明:人工冻结236 h后,土体以下5,30和55 cm深度处,冻结圈分别扩展到170,200和208 mm,HDPE同轴管换热器传热效率满足土体冻结要求,可以适用于人工冻结土体。In order to study the heat transfer property of HDPE coaxial-tube heat exchanger, the coaxial-tube heat exchanger physical model was constructed and its number was analyzed using the V.C.Mei heat transfer model and using the ANSYS fluent to perform the numerical simulation for the developing laws of the temperature field of artificially frozen soil. The 236 h artificial freezing experiments on sampling clay in Changchun were simultaneously carried out using self-made test device for studying the frost heave settlement and HDPE coaxial-tube, and the variation of ground temperature field, and the theoretical analysis and analog experiment data closely fit were obtained. The results show that the freezing collar on 5, 30, 55 cm deep below soil have extended to 170, 200, 208 mm after 236 h for artificial freezing. So the heat transfer property of HDPE coaxial-tube heat exchanger meet soil freeze requirements and can be applied to artificial frozen soil.

关 键 词:人工冻结 HDPE同轴管换热器 温度场 

分 类 号:TB64[一般工业技术—制冷工程] TU472.9[建筑科学—结构工程]

 

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