在我国，地热资源比较丰富，地热井出水温度一般高达80℃以上，可直接供室内采暖，但此方案存在以下缺陷。首先，由于地热井出水量的限制，使采暖面积受到制约。其次地热水经过系统循环后直接排放，能源利用率低，且由于地热水水质原因造成系统设备及管路大量腐蚀，提高了供热 In our country, geothermal resources are abundant, geothermal well water temperature is generally higher than 80 ℃, can be directly for indoor heating, but this program has the following shortcomings. First of all, due to restrictions on the geothermal well water discharge, the heating area is restricted. Secondly, geothermal water is directly discharged after being circulated by the system, resulting in low energy utilization rate and a large amount of corrosion of the system equipment and piping due to the quality of geothermal water, thus increasing the heat supply