本文通过建立地源热泵管群传热模型,对全年供冷量大于、小于及等于供热量三种情况在先夏季供冷后冬季供热与先冬季供热后夏季供冷运行模式下地温场的变化及其对系统运行效率的影响分别进行研究。结果表明：全年供冷量大于供热量时,至10年运行结束时,前者中心埋管处温升低于后者,差值约为1.5℃;管群外围距中心埋管15m处温度值,前者高于后者,差值约为0.6℃,对实际工程提供指导。%A heat transfer model to calculate soil temperature was developed. Three running modes to effective soil temperature were calculated and compared, i.e. annual cooling loads greater than, less than and equal to heating loads. Results showed that when the annual cooling loads is greater than the heating loads, then set up two kinds of operation modes. The first mode is that first operate summer cooling, then the winter heating, the other mode is that first operate winter heating, then the summer cooling. To the end of the 10-year running, the former temperature of the center pipe lower than the latter, the difference is about 1.5℃. The temperature of the periphery tube from the center pipe 15 meters, its value of the former higher than the latter, the difference is about 0.6%. This result had guide meaning for the project.
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