制热工况下地埋管周围土壤的热湿迁移试验研究

曾召田; 赵艳林; 吕海波; 徐云山; 莫红艳

doi:10.11779/CJGE2017S1029

制热工况下地埋管周围土壤的热湿迁移试验研究 English Version

曾召田^1,2,
赵艳林^1,2,
吕海波^1,2, ,,
徐云山¹,
莫红艳¹

1. 广西建筑新能源与节能重点实验室(桂林理工大学),广西桂林 541004;
2. 广西大学土木建筑工程学院,广西南宁 530004;

基金项目: 国家自然科学基金项目（41502284; 51568014; 41272358）; 国土资源部岩溶生态系统与石漠化治理重点实验室项目（KDL201603）; 桂林理工大学博士科研启动基金项目（2016254）

详细信息

作者简介:
曾召田(1981-),男,湖南邵阳人,博士,高级实验师,主要从事非饱和土力学、浅层地热能的应用技术及环境岩土工程问题等方面的研究与教学工作。E-mail:zengzhaotian@163.com。

通讯作者:
吕海波，E-mail：lhb@glut.edu.cn

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出版历程
- 收稿日期: 2016-11-27
- 发布日期: 2017-11-19

Heat and moisture migration in soils around ground heat exchangers under heating operation of ground source heat pump

1. Guangxi Key Laboratory of New Energy and Building Energy Saving (Guilin University of Technology), Guilin 541004, China;
2. College of Civil Engineering, Guangxi University, Nanning 530004, China

摘要

摘要: 基于实际工程建立了地源热泵空调系统运行过程的岩土体原位观测站,实现系统运行状况和换热过程中岩土体温度变化、水分迁移的实时监测,通过冬季工况运行试验,揭示地源热泵运行过程中土体的热湿迁移效应。研究结果表明：冬季工况下该地源热泵空调系统的机组性能系数COP为3.58,具有良好的制热效果;土壤温度场的变化受地埋管热交换和大气环境变化两个因素的影响,但二者的影响范围及程度有所区别;土壤温度场的变化幅度随着与地埋管距离的增加而递减,竖埋管热作用的影响半径约2.0 m左右,水平埋管热作用的影响半径约1.0 m左右;地埋管热交换对土壤湿度场的影响不显著,但大气降雨引起的地表水入渗和地下水位的变迁对土壤湿度场变化有明显影响。
- 地热能 /
- 地源热泵 /
- 热交换 /
- 热作用半径 /
- 热湿迁移
Abstract: An in-site observation station for soils around the ground heat exchanger (GHE) in the operating process of ground source heat pump (GSHP) is installed to monitor the operation performance of GSHP as well as heat and moisture migration in soils with the heat exchange. Through a heating experiment of GSHP, the effect of heat and moisture migration in soils is revealed. The experimental results show that the GSHP under heating condition has a stable running performance and good heating effect, and its coefficient of performance (COP) is 3.58. The change of temperature fields of soils is affected by the heat exchange of GHE and atmospheric environmental change, but their influence scope and degree are different. Meanwhile, the variation range of temperature field of soils decreases progressively with the increasing distance to the GHE. Therefore, the heat influencing radius of vertical and horizontal GHE is 2.0, 1.0 m, respectively. Finally, the impact of heat exchange of GHE on moisture field of soils is in-apparent. However, there are two obvious impact factors, the surface water infiltrating caused by rainfall and change of the groundwater table on the variation of moisture field of soils.
- geothermal energy /
- ground source heat pump /
- heat exchange /
- heat influencing radius /
- heat and moisture migration

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参考文献(12)

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