天津市浅层地热能存在的热堆积问题及解决方法探讨  

The cold&heat accumulation problem and solution methods of the shallow geothermal resource in Tianjin

作　　者：岳丽燕[1] 孟令军[2] 赵苏民[1] 卢宝[1] 黄贤龙[1] 

机构地区：[1]天津地热勘查开发设计院,天津300250 [2]中水北方勘测设计研究有限责任公司,天津300200

出　　处：《地质调查与研究》2017年第1期76-80,共5页Geological Survey and Research

基　　金：国家科技支撑计划课题"天津市生态城地源热泵高效利用技术研究与示范(2013BAJ09B04)"

摘　　要：通过对天津市浅层地热能地质环境动态监测系统获得的地埋管换热器周围温度场动态变化数据的归纳分析,得出以下结论:大部分地源热泵工程能满足建筑供暖制冷需求,地埋管换热器周围土壤在运行一个制冷供暖周期后能恢复到原始地温,不会对地质环境产生影响;一小部分地源热泵不能满足建筑制冷供暖需求,地埋管出水温度不能达到设计要求,换热器周围土壤温度出现持续的升高,在下一个制冷供暖周期不能恢复到原始地温,存在热堆积问题。在分析存在问题的基础上,提出以下可行解决方法:增加换热孔间距、调整换热孔群布置方式、地埋管与抽水井耦合开发利用、复合式供暖制冷系统以及深浅间隔布置的换热孔设计方式。With the number of shallow geothermal energy engineerings increasing, the shallow geothermal geological environmental dynamic monitoring system was established in Tianjin, which can get temperature change data around ground heat exchanger. The dynamic monitoring data analysis showed that most engineerings can meed the building need of heating＆cooling, and the soil temperature around ground heat exchanger can restore to the original after a heating＆cooling heating cycle, which will not impact on geological environment. A small part engineerings can＇t meet the building demand of heating＆cooling in the operation, and the water temperature of the buried pipe in and out can＇t meet the design requirements, soil temperature around ground heat exchanger in continuous rise or fall. It can＇t restore to the original before the next heating＆cooling heating cycle. There are cold＆heat accumulation problems around the buried tube heat exchanger. The paper based on analysising many factors which affect the problems, developed different solutions for the different cumulative heating and cooling load model of buildings, which can avoid cold＆heat accumulation problem and improve the thermal efficiency and service life of the system.

关 键 词：浅层地热能 地埋管换热器 冷热不均衡 热堆积 

分 类 号：P314[天文地球—固体地球物理学]