CAJ | 학술논문

影响地源热泵系统效果的关键因素是室外地埋管换热器的设置情况，影响地埋管换热器换热性能的主要因素是岩土的综合导热系数、综合比热容以及钻孔的总热阻等热物性参数。各工程所在地地质条件差异很大，如何得到地埋管换热器换热性能参数是地源热泵系统设计必须解决的问题。本文基于线热源模型得出换热器内流体平均温度与时间的对数关系曲线，通过测试地埋管换热器进出口水温，进而推算出岩土的综合导热系数及热阻，大大简化了计算过程。此外，通过对地埋管测试井长期连续监测发现，在寒冷或严寒地区对于冬夏季冷热负荷不平衡的系统，室外地埋管换热区岩土温度呈下降趋势，设计时应考虑解决措施。
영향지원열빙계통효과적관건인소시실외지매관환열기적설치정황，영향지매관환열기환열성능적주요인소시암토적종합도열계수、종합비열용이급찬공적총열조등열물성삼수。각공정소재지지질조건차이흔대，여하득도지매관환열기환열성능삼수시지원열빙계통설계필수해결적문제。본문기우선열원모형득출환열기내류체평균온도여시간적대수관계곡선，통과측시지매관환열기진출구수온，진이추산출암토적종합도열계수급열조，대대간화료계산과정。차외，통과대지매관측시정장기련속감측발현，재한랭혹엄한지구대우동하계랭열부하불평형적계통，실외지매관환열구암토온도정하강추세，설계시응고필해결조시。
T he key of the ground source heat pump system is the design of the ground heat exchanger. Some soil thermal properties including soil heat conductivity,specific heat capacity and entire thermal resistance of the well drilling affect heat transfer characteristics of ground heat exchanger significantly. However,geological conditions are different in different area,resulting in the difficulty in acquiring ground heat exchanger heat transfer capacity in every project designing. In this paper,the log curve of the relationship between average temperature and time was obtained based on the line heat resource theory. According to the test of the inlet and outlet water temperature,the soil heat conductivity and thermal resistance were calculated,leading to a simpler calculation. Additionally,it was revealed that when summer cooling load and winter heating load was unbalanced in cold area,the temperature dropped in buried pipes outdoors,requiring solutions at the design stage.