分层渗流土壤能源桩传热特性研究

陈希; 童梦钰; 张正威

doi:10.13204/j.gyjzG21082101

分层渗流土壤能源桩传热特性研究

doi: 10.13204/j.gyjzG21082101

浙江农林大学风景园林与建筑学院, 杭州 311300

基金项目:

浙江省建设厅项目(2017K36)

杭州市建委科研项目(2017K18)

详细信息

作者简介:
陈希,男,1994年出生,硕士研究生

通讯作者:
张正威,男,1964年出生,博士,教授,zwzhang10@126.com。

计量
- 文章访问数: 81
- HTML全文浏览量: 22
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2021-08-21
- 网络出版日期: 2023-02-06

Study on Heat Transfer Characteristics of Energy Piles in Stratified Seepage Soil

College of Landscape Architecture, Zhejiang A&F University, Hangzhou 311300, China

摘要

摘要: 以能源桩为研究对象,结合土壤分层渗流的实际工程地质情况,根据能量守恒原理建立能源桩传热微分方程,采用分离变量和拉普拉斯变换求得了分层渗流土壤能源桩传热的过余温度表达式。通过计算,验证了传热模型的正确性。基于该模型讨论了土壤热物理性质、渗流速度等因素对过余温度分布的影响。结果表明:桩体上、下相邻土层热物理性质变化会对桩顶和桩底范围内的过余温度分布产生影响,且对桩的总换热量有一定影响;渗流会显著影响土层内过余温度的分布,离能源桩中心相同距离处,上游土层过余温度低于下游土层;渗流速度越大,土层内过余温度等温线偏移越显著;热输运效应越明显,能源桩的换热效率越高。
- 分层土壤 /
- 渗流 /
- 能源桩 /
- 计算模型 /
- 传热特性
Abstract: Taking energy piles as the reasearch object, combined with the actual geological layered seepage, the differential equation for heat transfer of energy piles was established according to the principle of energy conservation. The excess temperature equation for heat transfer of energy piles in layered seepage soil was obtained by the method of seperation variables and Laplace Transform. The calculation software was programmed to verify the accuracy of the heat transfer model. Based on the model, the influence for thermophysical properties of soil and seepage velocities on the distribution of excess temperature was discussed. The results showed that changes in thermophysical properties of adjacent soil layers under and below the piles would influence the excess temperature distribution at the top and bottom of the piles, and had a certain impact on the total heat transfer of piles. Seepage had a significant impact on the distribution of excess temperature in stratified soil. At the same distance apart from the centers of energy piles, the excess temperature of the upper-stream was lower than that of the lower-stream in the same soil layer. The higher the seepage velocity, the more significant the isotherm deviation of excess temperature in the soil layer; the more obvious the heat transfer, and the higher the heat exchange efficiency of energy piles.
- layered soil /
- seepage /
- energy pile /
- calculation model /
- heat transfer characteristics

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参考文献(16)

[1]	陈忠购, 张正威.分层渗流地层中竖直地埋管的换热计算模型[J].太阳能学报, 2013, 34(5):831-838.
[2]	DIAO N, LI Q, FANG Z.Heat transfer in ground heat exchangers with groundwater advection[J].International Journal of Thermal Sciences, 2004, 43(12):1203-1211.
[3]	MOLINA-GIRALDO N, BLUM P, ZHU K, et al.A moving finite line source model to simulate borehole heat exchangers with groundwater advection[J].International Journal of Thermal Sciences, 2011, 50(12):2506-2513.
[4]	王子阳, 张仪萍, 战国会, 等.有渗流时埋管换热器传热模型[J].浙江大学学报(工学版), 2012, 46(8):1450-1456.
[5]	CHOI J C, PARK J, LEE S R.Numerical evaluation of the effects of groundwater flow on borehole heat exchanger arrays[J].Renewable Energy, 2013, 52:230-240.
[6]	TYE-GINGRAS M, GOSSELIN L.Generic ground response functions for ground exchangers in the presence of groundwater flow[J].Renewable Energy, 2014, 72:354-366.
[7]	ZANCHINI E, LAZZARI S, PRIARONE A.Long-term performance of large borehole heat exchanger fields with unbalanced seasonal loads and groundwater flow[J].Energy, 2012, 38(1):66-77.
[8]	ANGELOTTI A, ALBERTI L, LA LICATA I, et al.Energy performance and thermal impact of a Borehole Heat Exchanger in a sandy aquifer:Influence of the groundwater velocity[J].Energy Conversion and Management, 2014, 77:700-708.
[9]	RIVERA J A, BLUM P, BAYER P.Analytical simulation of groundwater flow and land surface effects on thermal plumes of borehole heat exchangers[J].Applied Energy, 2015, 146:421-433.
[10]	LIUZZO-SCORPO A, NORDELL B, GEHLIN S.Influence of regional groundwater flow on ground temperature around heat extraction boreholes[J].Geothermics, 2015, 56:119-127.
[11]	王华军, 齐承英, 杜红普, 等.地下水渗流条件下埋地换热器传热性能的实验研究[J].太阳能学报, 2010, 31(12):1610-1614.
[12]	冯琛琛, 王沣浩, 张鑫, 等.地下水渗流对垂直埋管换热器换热性能影响的实验研究[J].制冷与空调, 2011, 25(4):328-331.
[13]	白冰.空心圆柱饱和多孔介质热固结问题的解析解[J].岩土力学, 2011, 32(10):2901-2906.
[14]	LUO J, ROHN J, BAYER M, et al.Analysis on performance of borehole heat exchanger in a layered subsurface[J].Applied Energy, 2014, 123:55-65.
[15]	HU J.An improved analytical model for vertical borehole ground heat exchanger with multiple-layer substrates and groundwater flow[J].Applied Energy, 2017, 202:537-549.
[16]	EROL S, FRANÇOIS B.Multilayer analytical model for vertical ground heat exchanger with groundwater flow[J].Geothermics, 2018, 71:294-305.