基于动态热负荷约束的同轴深井换热器传热特性模拟与分析

施志钢; 李志刚; 张林; 夏世伟; 刘婉清; 高嘉宁

doi:10.19912/j.0254-0096.tynxb.2025-0164

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基于动态热负荷约束的同轴深井换热器传热特性模拟与分析

更新时间：2026-07-22

- 基于动态热负荷约束的同轴深井换热器传热特性模拟与分析
- Vol. 47, Issue 6, Pages: 544-551(2026)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.19912/j.0254-0096.tynxb.2025-0164
  CLC： TK529
- Online First：08 July 2026，
  
  Published：2026
- 稿件说明：
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施志钢, 李志刚, 张林, et al. 基于动态热负荷约束的同轴深井换热器传热特性模拟与分析[J]. 2026, 47(6): 544-551.
DOI：

施志钢, 李志刚, 张林, et al. 基于动态热负荷约束的同轴深井换热器传热特性模拟与分析[J]. 2026, 47(6): 544-551. DOI： 10.19912/j.0254-0096.tynxb.2025-0164.

摘要

针对中深层地源热泵系统中的深井换热器

基于有限差分法构建数值模型

对其在动态热负荷条件下的传热特性进行分析。通过建立数值模型

结合青岛地区的实际气象数据和现场实验验证

探讨不同流体速度、地温梯度及地质参数对深井换热器热性能的影响。结果表明

深井换热器的进出口温度随动态热负荷波动

但出口温度更为稳定;流体速度的增大虽能提高热输出

但会导致浅层岩土反向传热损失加剧;高地温梯度可显著提升热输出性能

且深层区域的换热效率优于浅层区域。

Abstract

A numerical model based on the finite difference method is developed for deep borehole heat exchangers used in medium-deep ground source heat pump systems

and the heat transfer characteristics under dynamic thermal load conditions are analyzed. Using this model along with actual meteorological data from Qingdao and validation via field experiments

the effect of fluid velocity

geothermal gradient

and geological parameters on the thermal performance of the deep borehole heat exchanger are investigated. The results indicate that while the inlet and outlet temperatures of the exchanger fluctuate in response to dynamic thermal loads

the outlet temperature exhibits greater stability. Although increasing fluid velocity enhances heat extraction

it also leads to higher heat loss caused by reverse heat transfer in shallow rock and soil layers. Higher geothermal gradients significantly improve heat extraction performance

and heat exchange efficiency is found to be greater in deeper regions compared to shallow zones.

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references

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