水源热泵回灌时微生物在成层砂土中沉积特性机理研究

赵军; 张汉文; 彭鹏

doi:10.19912/j.0254-0096.tynxb.2025-0519

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (8) : 39-45. DOI: 10.19912/j.0254-0096.tynxb.2025-0519

水源热泵回灌时微生物在成层砂土中沉积特性机理研究

赵军^1,2, 张汉文^1,2, 彭鹏³

作者信息 +

STUDY ON SEDIMENTATION CHARACTERISTICS OF MICROORGANISMS IN LAYERED SAND DURING RECHARGE OF WATER SOURCE HEAT PUMP

Zhao Jun^1,2, Zhang Hanwen^1,2, Peng Peng³

Author information +

文章历史 +

摘要

针对水源热泵回灌过程中微生物在分层土中的堵塞问题,将不同粒径的砂砾作为多孔介质,采用大肠杆菌作为示踪剂探究其迁移-沉积特性,并通过一维砂柱试验得出微生物在分层土中的突破曲线及迁移-沉积规律。室内试验结果表明：1）大肠杆菌主要沉积于表层,其浓度随迁移距离增加而递减。介质渗透性越低（或颗粒粒径越小）,沉积位置越趋近表层。2）分层结构对大肠杆菌迁移过程具有显著影响,粗-细颗粒构成的层序结构会导致流出液中菌体峰值出现时间前移。3）微生物堵塞机理的模拟分析表明,渗透系数随时间衰减规律的实验数据与理论预测值具有良好一致性。本研究可为提升水源热泵系统回灌效率提供理论依据。

Abstract

To address the clogging issue caused by microbial activity in stratified soils during water source heat pump reinjection, this study utilized sand with varying particle sizes as porous media, employing Escherichia coli （E. coli） as a tracer to investigate microbial migration-deposition characteristics. One-dimensional sand column experiments were conducted to analyze breakthrough curves and migration-deposition patterns of microorganisms in stratified soils. The indoor test results demonstrate：1） In heterogeneous porous media, E. coli primarily deposits in surface layers, with its concentration decreasing progressively with increasing migration distance. Lower media permeability （or smaller particle sizes） causes deposition zones to shift closer to the surface. 2） Stratified configurations have a significant impact on bacterial migration. A sequence of overlying coarse-grained layers and underlying fine-grained layers causes the peak time of the bacteria in the effluent to shift forward. 3） Simulation of the microbial clogging mechanism reveals that experimental data on temporal variation of permeability coefficient decay exhibit good consistency with theoretical predictions. This research provides theoretical foundations for enhancing reinjection efficiency in water source heat pump systems.

导出引用

赵军, 张汉文, 彭鹏. 水源热泵回灌时微生物在成层砂土中沉积特性机理研究[J]. 太阳能学报. 2026, 47(8): 39-45 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0519

Zhao Jun, Zhang Hanwen, Peng Peng. STUDY ON SEDIMENTATION CHARACTERISTICS OF MICROORGANISMS IN LAYERED SAND DURING RECHARGE OF WATER SOURCE HEAT PUMP[J]. Acta Energiae Solaris Sinica. 2026, 47(8): 39-45 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0519

中图分类号： TK01+8

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