摘要
严寒地区地源热泵系统由于冷热负荷不同从土壤中吸收与放出的热量不平衡,会直接导致地下土壤冷量的堆积,对整个系统的COP影响很大,影响地源热泵系统的运行,严重时甚至使整个系统无法工作.本文通过对严寒地区某地源热泵示范项目进行实时监测(监测时间:2017年9月至2018年8月),分析不同间距井群地下土壤的冷堆积程度.结果表明:4 m间距井群冷堆积大于6 m间距井群冷堆积,土壤的传热具有一定的滞后性,滞后时间约为一个月;在-10 m以上土壤温度场变化较大,-10 m以下土壤温度场变化较小且趋势相同.在严寒地区依靠土壤的自恢复来实现土壤的热平衡难以实现.
Due to the imbalance of heat absorbed and released from the soil by different cooling and heating loads,the underground soil cooling capacity will accumulate,which has a great influence on the COP of the whole system and the operation of the ground source heat pump system.In severe cases,the entire system will not work.In this paper,the cold accumulation degree of the underground soil in different spacing wells group was analyzed by real-time monitoring of a ground-source heat pump demonstration project in severe cold area(monitoring time is from September 2017 to August 2018).The analysis shows that the cold accumulation of 4-meter interval wells was greater than that of 6-meter interval wells,and the heat transfer of the soil had a certain lag time,the lag time was about one month,and the temperature field of the soil above 10 meters varied greatly.The temperature field of soil below 10 m had a small change and the trend was the same.It is difficult to realize soil heat balance by soil self-recovery in severe cold area.
作者
朱林
张贺
杨金刚
ZHU Lin;ZHANG He;YANG Jin-gang(Municipal and Environmental Engineering,Jilin Jianzhu University,Changchun 130118,China)
出处
《吉林师范大学学报（自然科学版）》
2020年第1期89-92,共4页
Journal of Jilin Normal University:Natural Science Edition
基金
国家安全监管总局办公厅项目(Jilin-0004-2017AQ)
关键词
地源热泵
土壤温度场
严寒地区
管间距
ground source heat pump
soil temperature field
severe cold area
tube spacing
