严寒地区土壤源热泵土壤温度场变化特性研究

Study on Soil Temperature Field Variation of Ground Source Heat Pump Project in Extreme Cold Area

本文通过对长春地区某土壤源热泵工程的土壤温度场进行实时监测,研究其变化规律及影响因素。研究表明:土壤温度场随热泵供热/供冷交替运行呈现周期性正弦规律变化;土壤温度场受室外气温影响随深度逐渐减弱,起测点-2.5m处最大,-10m后变化幅度趋于相同;过渡季节土壤温度场自恢复能力非常有限,土壤源热泵工程在冷热负荷不均衡的条件下长期运行不可避免出现热失衡现象。

Based on the real-time monitoring of soil temperature field of a soil source heat pump project in Changchun, the variation law of soil temperature field and its influencing factors was researched. It shows that： the soil temperature field with the heat pump heating/cooling alternate operation present a periodic variation. The affect of outdoor temperature on the soil temperature field gradually weakened with the increase of the depth, and the biggest change appears at -2.5 （the beginning measure point） and after -10m the change tend to be the same. In transition season soil self-recovery capability is very limited, and ground source heat pump system under the condition of cold and hot load imbalance to run for a long time inevitable emergence of thermal imbalance phenomenon.