中文摘要：

提出了一种多功能地源热泵空调系统（MFGSHP）,该系统除了具有夏季制冷、冬季供热的功能以外,还可全年提供生活热水,有效消除对土壤取热/排热不平衡的现象.模拟了该系统在长江中下游典型气候区长期运行时地下换热器周围土壤的温度分布和变化趋势.模拟结果显示,普通地源热泵空调系统（GSHP）单独供冷运行9a后,会导致地下土壤温度持续升高9K以上,系统的运行状况严重恶化,甚至出现无法正常运行的现象.含热水供应的多功能地源热泵系统运行9a后土壤温度仅下降0.3K,说明其可有效消除传统地源热泵空调系统冬、夏季取热/排热不均现象,缓解土壤温度升高的趋势.此外,该系统还能扩大地源热泵机组的应用范围,提高机组的性能系数.

英文摘要：

A new multi-function ground source heat pump（MFGSHP） system is presented.It provides not only space cooling and space heating but also domestic hot water,which can eliminate the imbalance between the heat ejected from soil and the heat absorbed from soil.Then,the temperature distribution and variation of the soil around the underground heat exchangers during long term performance is simulated under the typical climate condition of the middle and downstream of Yangtze River.The simulation results show that the temperature of the soil around the underground heat exchanger increases 9K due to the surplus heat ejected into the earth in summer after 9 years operation of the conventional ground source heat pump（GSHP） system,which deteriorates the system performance and might lead to eventual failure of the system.On the contrary,after 9 years operation of the MFGSHP system,the temperature of the soil around the underground heat exchanger only decreases 0.3K,indicating that this system can effectively eliminate the imbalance between the heat ejected from soil and the heat absorbed from soil caused the GSHP system and control the temperature rise.The MFGSHP system can also expand the application of the conventional GSHP system and improve the energy performance efficiency.