双U形地埋管换热器冬季周围土壤温度变化

Soil Temperature Change around Double U-type Buried Tube Heat Exchanger in Winter

建立了计算地埋管换热器周围土壤温度的数学模型。结合天津地区某实际工程,采用跟踪测试方法研究了冬季双U形地埋管换热器周围土壤温度的变化。深度为10m以下的土壤温度基本不受环境温度的影响。随着深度的增加,土壤原始温度逐渐升高,在深度为10～120m范围内,土壤原始平均温度为15.9℃。地埋管换热器冬季的热作用半径为1.5～2.5m。

A mathematical model for calculating soil temperature around double U-type buried tube heat exchanger is constructed. Combined with a practical engineering in Tianjin Region, the soil tempera- ture change around double U-type buried tube heat exchanger in winter is studied by the follow-up test method. The soil temperature at the depth of less than 10 m is not affected by environment. The original soil temperature gradually increases with an increase in depth. The average original soil temperature is 15.9 ℃ at the depth from 10 m to 120 m. The thermal action radius of the buried tube heat exchanger is 1.5 m to2.5 m.