【摘要】 针对地能利用中耗能和蓄能过程吸热和放热的时间效应进行了实验分析和探讨,研究了地下蓄能体温位变化和分布规律。实验结果表明:间歇过程是提高地下蓄能效果的有效手段,间歇频率和地下瞬态换热负荷的协同优化控制将有利于发挥其综合效能;连续高温大负荷蓄热,地下换热器热源周边温度急升,导致热源与近边土壤温差骤减,发生周边热量积聚和传热抑制现象。本文还提出了地下蓄能温度"理想域值"的概念,可作为评价能量蓄存效果的重要指标。更多还原

【Abstract】 The time effect for the heat absorption and releasing in the heat energy storage process in the earth energy application has been explored experimentally,the time-dependent variation and distribution pattern of the temperature level of the underground energy storage body were investigated.The experiment results show that the intermittent working process is an effective means to enhance the underground heat energy storage efficiency,the synergetic control of the intermission frequency and the underground transient heat-transfer load is beneficial to bring the comprehensive efficiency into full play.A continuous high load heat storage with sharp rise of the soil temperature around the heat source leads to an obvious fall of the temperature difference between the heat source and the adjacent soil,resulting in the adjacent heat accumulation and the heat-transfer choke.Besides,a concept of ideal temperature domain of underground energy storage was presented as an important index to evaluate the effect of energy storage.更多还原