渗流对地下换热器能量动态蓄存控制的影响

针对地下水渗流旺盛地区的地下蓄能,提出全新的偏置加载控制模式。利用负荷量和温位的双重控制,可更加有效地提高地下蓄能的传热效率,提升蓄能区域的能量保持能力。通过分析可知,在输入能量基本一致的条件下,偏置梯级加载控制比环式梯级加载控制表现出更加明显的蓄能能力和保持潜力。对偏置式动态间歇蓄能方式的研究发现,短间歇蓄能方式在蓄能数量、平均温升和最高温度方面都比长间歇蓄能方式更有利于能量在埋管区域的蓄存、扩散和保持。

Effect of groundwater seepage on energy dynamic storage control of underground heat exchanger

For the underground energy storage system in the region with strong groundwater seepage,a new offset load control mode was proposed based on a large-scale numerical model of multi-heat source.Applying the dual control of the load magnitude and the temperature potential,it was possible to enhance the heat transfer efficiency of the underground energy storage system and the energy consevation capability of the energy storage region.The analysis demonstrated that at the condition of same energy input,the offset step-load control mode is superior to the traditional ring-load control mode in the capacity of energy storage and conservation.The study on the offset dynamic energy storage intermittence showed,short intermittence is superior to long intermittence in the energy storage magnitude,the average temperature rise and the maximal temperature to enhance the energy storage,diffusion and conservation in the pipe burying region.