地层初始温度对地埋管换热量影响分析

Stratum initial temperature effect on the buried pipe heat transfer

根据我国大陆城市由南向北年平均温度变化规律,进行了9个现场热响应试验,获得了武汉、淮南、西安、济南、天津、廊坊、北京、巴彦淖尔、阜新的地层初始平均温度和冬、夏季工况地埋管换热器的吸热和放热能力数据,识别出每延米换热量与地层初始温度的相关性方程,并认为不是所有的地区的建筑都适合应用地埋管地源热泵工程来制冷和供暖,只有当地层初始温度为13~20℃时,才适宜浅层地热能地埋管地源热泵的合理开发利用。

According to the regular of the annual mean temperature of China mainland from south to north, we implemented nine field thermal response tests, at Wuhan, Huainan, Xi＇an, Ji＇nan, Tianjin, Langfang, Beijing, Bayannur and Fuxin, and obtained the initial average the stratum temperature, the heat exchanger ability of heat absorb and release in winter and summer, and identified the correlation equation of heat transfer per meter and stratum initial temperature. It is suggested that not all parts of buildings can fit the refrigeration and the heating of ground source heat pump. Only when the stratum initial temperature is 13 - 20℃, the shallow geothermal energy of ground source heat pump can be rationally exploited and utilized.