饱和岩土介质地埋群管传热特性分析

李西斌; 李晓星; 赵石娆; 张正威

doi:10.6052/j.issn.1000-4750.2014.08.0736

饱和岩土介质地埋群管传热特性分析

1.
浙江农林大学风景园林与建筑学院, 杭州 311300;
2.
南京工业大学土木学院, 南京 210009

基金项目: 浙江省自然科学基金项目(LY12D02001);浙江农林大学人才项目(2010FR099)

详细信息

作者简介:
李西斌(1977-),男,山东人,副教授,博士,从事能量桩和软土固结方面研究(E-mail:ytulxb@126.com);李晓星(1989-),女,山东人,硕士生,从事复杂环境岩土工程及浅层地热能利用研究(E-mail:lixiaoxing3665@163.com);赵石娆(1989-),女,河北人,硕士生,从事地埋管地源热泵技术的研究(E-mail:shiraozhao@126.com).

通讯作者:
张正威(1964-),男,江苏人,教授,博士,从事浅层地热能利用和绿色建筑技术研究(E-mail:zwzhang10@126.com).

中图分类号: TK124
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出版历程
- 收稿日期: 2014-08-28
- 修回日期: 2016-04-11
- 刊出日期: 2016-07-24

HEAT TRANSFER PERFORMANCE OF GROUND HEAT EXCHANGER GROUP IN SATURATED SOIL

1.
The college of Landscape Architecture, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China;
2.
The college of Civil Engineering, Nanjing University of Technology, Nanjing 210009, China

More Information

Corresponding author:
ZHANG Zheng-wei: 10.6052/j.issn.1000-4750.2014.08.0736

摘要

摘要: 该文利用格林函数法建立了半无限岩土介质传热计算模型,讨论了介质内过余温度场分布。结果表明:半无限热源作用下介质内温度响应在孔壁处最大,随离孔壁距离的增加呈指数衰减;随时间的增加而增大,并向周围岩土体扩散,热作用半径逐渐增大;地埋群管情形下,钻孔间距对孔壁温度影响明显,钻孔的布置形式对孔壁温度影响不明显,建议了最佳孔距的计算方法。提出了地表最大影响深度计算公式,计算表明地表仅影响其临近区域的温度分布,离地表较远处影响很小,地表的影响深度随时间增加而增大。但小于20 m,对地表下恒温层影响不大。
- 饱和岩土 /
- 格林函数 /
- 地埋群管 /
- 计算模型 /
- 传热性能
Abstract: A new model was proposed to simulate the heat transfer in a semi-infinite saturated soil using a Green's function. In this study, the heat transfer performance in the surplus temperature filed was discussed. It illustrated that the most obvious temperatures response occurred at the walls of holes. The temperature would decrease exponentially with an increasing in the distance from the wall of the hole. The affected zone would increase with the spreading of thermal energy to the surrounding soil. In the case of multi-drilling holes, the spacing of hole had obviously affected the temperature at the wall of a hole. But the arrangement type of drilling holes had little influence on that. Two formulas were carried out to determine the optimal borehole spacing and the maximum effective depth, respectively. The results showed that it only affected the region close to the ground surface. The influencing zone would increase with increasing time. The largest influence depth was less than 20 meters and it had little influence on a constant temperature strata.
- saturated soils /
- Green's function /
- ground heat exchanger group /
- theoretical model /
- heat transfer performance

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参考文献(17)

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