并联管数对跨季节土壤储热系统直埋套管式换热器热性能与管间热干扰的影响

汪建辉; 王海涛; 董冰妍

doi:10.19799/j.cnki.2095-4239.2026.0637

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并联管数对跨季节土壤储热系统直埋套管式换热器热性能与管间热干扰的影响

XXXX | 更新时间：2026-09-04

- 并联管数对跨季节土壤储热系统直埋套管式换热器热性能与管间热干扰的影响
- Effects of the Number of Parallel Vertical Coaxial Heat Exchangers on Thermal Performance and Inter-Borehole Thermal Interference in a Seasonal Soil Thermal Storage System
- 储能科学与技术 2026年页码：1-17
- 作者机构：
  
  安徽建筑大学环境与能源工程学院，安徽合肥 230601
- 作者简介：
  
  汪建辉（2002—），男，硕士研究生，研究方向为储能技术，E-mail：wjh@stu.ahjzu.edu.cn；
  王海涛，教授，主要从事储能技术方面的研究，E-mail：wht@ahjzu.edu.cn。
- 基金信息：
  
  安徽省教育厅自然科学重点项目(2024AH050233)
- DOI：10.19799/j.cnki.2095-4239.2026.0637
  中图分类号： TK 52
- 修回：2026-09-02，
  
  网络首发：2026-09-03，
- 稿件说明：
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汪建辉, 王海涛, 董冰妍. 并联管数对跨季节土壤储热系统直埋套管式换热器热性能与管间热干扰的影响[J]. 储能科学与技术, XXXX, XX(XX): 1-17.

WANG Jianhui, WANG Haitao, DONG Bingyan. Effects of the Number of Parallel Vertical Coaxial Heat Exchangers on Thermal Performance and Inter-Borehole Thermal Interference in a Seasonal Soil Thermal Storage System[J]. Energy Storage Science and Technology, XXXX, XX(XX): 1-17.
汪建辉, 王海涛, 董冰妍. 并联管数对跨季节土壤储热系统直埋套管式换热器热性能与管间热干扰的影响[J]. 储能科学与技术, XXXX, XX(XX): 1-17. DOI： 10.19799/j.cnki.2095-4239.2026.0637.

WANG Jianhui, WANG Haitao, DONG Bingyan. Effects of the Number of Parallel Vertical Coaxial Heat Exchangers on Thermal Performance and Inter-Borehole Thermal Interference in a Seasonal Soil Thermal Storage System[J]. Energy Storage Science and Technology, XXXX, XX(XX): 1-17. DOI： 10.19799/j.cnki.2095-4239.2026.0637.

摘要

本文以跨季节土壤储热系统直埋套管式换热器为研究对象，在总埋管长度400 m、系统总质量流量1.24 kg/s、最小相邻钻孔中心距3 m及直径15 m布管区域约束下，建立套管式换热器—回填材料—土壤三维非稳态传热模型，对并联管数为1～8根的方案蓄取热性能和蓄热/取热阶段温度响应进行比较，并采用有限线热源（FLS）模型分析土壤侧热响应及管间热干扰。结果表明，取热效率随并联管数增加呈先升高后降低趋势，由S1的22.31%提高至S6的34.39%，随后在S8下降至32.78%。S6至S8的等效热影响半径仅由7.279 m增至7.359 m，增幅为1.10%，表明高管数阶段水平空间覆盖的边际收益趋于饱和。长时间FLS平均无量纲响应指标

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7.36600018

3.89466691

由7.579增至15.359，热干扰比例同步增大；S6至S8期间

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https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=117139952&type=

7.36600018

3.89466691

仍增加2.54%，而取热效率下降1.611个百分点，说明更强的土壤侧理论响应并不必然转化为更高的实际热回收。水力趋势与工程实施分析表明，在总流量固定条件下，增加并联支路使单支路地下直埋套管的沿程阻力趋势降低，但同时增加孔口、接口和调试需求。综合热回收、有效土壤利用、热干扰、水力趋势与工程实施因素，S6可视为本文固定资源约束下的合理转折方案，而非适用于所有场地的普适最优值。研究结果可为固定总埋管长度和总流量条件下跨季节地下储热系统的并联支路数量筛选提供参考。

Abstract

This study investigates vertical coaxial heat exchangers used in a seasonal soil thermal storage system. Under the constraints of a total installed borehole length of 400 m

a total system mass flow rate of 1.24 kg/s

a minimum center-to-center spacing of 3 m between adjacent boreholes

and a circular layout area with a diameter of 15 m

a three-dimensional transient heat-transfer model coupling the coaxial heat exchangers

backfill material

and surrounding soil was developed. The heat injection and extraction performance

together with the temperature responses during the heat-injection and heat-extraction stages

were compared for eight parallel configurations containing one to eight VCHEs. A finite line-source (FLS) model was further employed to characterize the ground-side thermal response and inter-borehole thermal interference. The results show that the heat-extraction efficiency first increases and then decreases with increasing number of parallel branches

rising from 22.31% for S1 to a maximum of 34.39% for S6 and subsequently decreasing to 32.78% for S8. From S6 to S8

the equivalent thermal influence radius increases only from 7.279 to 7.359 m

corresponding to an increase of 1.10%

indicating that the marginal benefit in horizontal ground coverage approaches saturation at higher branch numbers. The long-time average dimensionless FLS response indicator

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https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=117139940&type=

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8.38199997

4.57200003

increases from 7.579 to 15.359

accompanied by an increase in the thermal-interference ratio. From S6 to S8

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8.38199997

4.57200003

still increases by 2.54%

whereas the heat-extraction efficiency decreases by 1.611 percentage points

demonstrating that a stronger theoretical ground-side thermal response does not necessarily translate into greater practical heat recovery. The hydraulic-trend and engineering-implementation analyses indicate that

under a fixed total flow rate

increasing the number of parallel branches leads to a decrease in the relative frictional-resistance trend of each underground VCHE branch

while simultaneously increasing the number of borehole connections

interfaces

and commissioning requirements. Considering heat recovery

effective ground utilization

thermal interference

hydraulic trends

and engineering implementation

S6 can be regarded as a rational turning-point configuration under the prescribed resource constraints rather than a universally optimal solution for all sites. These findings provide a reference for selecting the number of parallel branches in seasonal underground thermal storage systems subject to fixed total borehole length and total flow rate constraints.

关键词

Keywords

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