寒冷地区土壤源供暖系统土壤取热及补热特性

Heat Extraction and Supplement Characteristics of Ground Source Heating System in the Cold Region

采用数值模拟的方法对寒冷地区土壤源供暖系统土壤取热及补热进行了研究。为验证所采用数值模拟方法的准确性与可靠性,将一口地源井取热后补热模拟结果与试验结果进行了比较,实验结果与模拟结果具有较好的一致性。以不同数量的地源井取热及补热的数值模拟结果表明:在模拟的工况中,土壤自行恢复率在6%~19%范围内,土壤取热后自行恢复能力较低。而设置补热量与取热量相同时,通过补热土壤平均温度均能恢复到取热前的工况。

The heat extraction and supplement of ground source heating system in the cold region are researched by numerical simulation method.To validate the accuracy and reliability of the employed simulation method,the heat extraction and supplement simulation results of a ground source well are compared with the experimental results.The simulation and experimental results show good agreement.From the simulation results of the heat extraction and supplement with different number wells,it is found that the ground self-recovery rate is in the range of 6%~19%in the simulation cases and the ground selfrecovery ability is low after heat extraction.When the amount of heat extraction is the same as the amount of heat supplement,the average temperature of ground can be restored to the condition before heat extraction.