Research on Characteristics of the Soil Temperature Field around Vertical Double U-Tube Group of the Heat Exchangers

摘要

Based on the temperature monitoring for the double U-tube wells with thermal resistance, numerical simulation researching on two-dimensional temperature field and three-dimensional temperature field was carried out for vertical double U-tube group. Under the condition of 6.5m for horizontal spacing of tube well, the Soil temperature around inner tube wells increases 0.4°C in one year, and 0.24°C for the surrounding tube wells. The paper calculates the increasing temperature of the tube wells, 7.95°C for inner tube wells and 4.70°C for surrounding tube wells. The soil temperature of tube wells is rising with the running time increasing, however, the temperature rate of the soil around inner tube wells is larger than the surrounding tube wells'.