摘要
地下水渗流是影响地源热泵埋管换热的重要因素。本文建立了可控渗流条件下的土壤耦合埋管换热实验台,研究了渗流速度、渗流来流温度对土壤耦合埋管传热特性的影响。研究结果表明,增大渗流速度将扩大埋管释热范围、提高土壤的吸热能力;降低渗流水温将增大埋管附近土壤的温度梯度,从而增大埋管与土壤耦合换热能力。研究结果有助于掌握地下水渗流变化对地埋管换热的影响规律,指导地埋管系统设计参数优化。
Underground water infiltration has the important influences on the coupled heat transfer between the soil and ground heat exchanger. The experiment of the buried tubes coupled heat transfer with the controllable infiltration is carried out. The effects of the in？？filtration velocity and temperature on the heat transfer behaviors are discussed. The results show t？hat the higher infiltration velocity can expand the tube＇s thermal exchange area and increase ？the heat rejection from the tube to the soil. The lower infiltration temperature can increase the soil temperature gradient around the buried tubes. This study is helpful for understanding the variation of infiltration and its effect on the ground coupled heat exchanger, and providing the guidance for the optimal design of ground-source heat pump system.
出处
《建筑热能通风空调》
2016年第6期6-9,共4页
Building Energy & Environment
基金
中央高校基本科研业务费专项资金资助项目(2010QZZD0105)
关键词
地下埋管换热器
热渗耦合
地埋管地源热泵
岩土热响应实验
ground coupled heat exchanger
heat-infiltration coupling
ground-source heat pump
rock-soil thermal response test
