西安地区土壤源热泵地埋管换热的岩土影响因素区域分布  

Regional distribution of rock-soil influences for ground heat exchange of ground-source heat pump in Xi'an Area

作　　者：官燕玲[1] 张小刚[1] 梁草茹 王玮[1] 张宇昊[1] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054

出　　处：《西北大学学报（自然科学版）》2016年第4期565-572,共8页Journal of Northwest University（Natural Science Edition）

基　　金：住房城乡建设部科学技术基金资助项目(2016-R1-004);陕西省科学技术研究发展计划基金资助项目(2013K13-02-01);陕西省住房和城乡建设厅科学技术计划基金资助项目(2014-04)

摘　　要：针对土壤源热泵地埋管换热的岩土影响因素，对浅层岩土进行影响因素区域分布研究。以西安市主城区为例，统计分析得到浅层岩土结构分布；应用Suffer模拟软件，对水位监测井的信息进行分析，得到潜水位深度分布；并选点进行多个岩土热响应试验，依据试验结果，分析该区域的浅层岩土热物性参数分布规律，并得到其温度分布。影响因素分布规律显示，该区域各地貌单元浅层岩土结构有明显不同；潜水位埋深一般为5～25m，但黄土塬潜水位较深，可达60m；黄土塬区域的综合导热系数明显小于其他地貌区域；研究区域地下深20～120ITI，平均温度分布值为16℃～18℃，温度梯度分布值为（1．5～3．9）×10-2℃／m，In view of rock-soil influences for ground heat exchange of ground-source heat pump, the research on regional distribution of shallow rock-soil influences is put forward. Taking the main city zone of Xi＇an as an example, the shallow rock-soil structure distribution was obtained through statistical analysis. The depth distri- bution of groundwater level was simulated using the Surfer simulation software after analyzing the wells monitoring groudwater table. A few sites were chose to perform rock-soil thermal response tests. Based on the testing results, the distribution characteristics of shallow rock-soil thermal properties in this area was analyzed, and the temperature distribution was presented. The following conclusions were drawn through the distribution characteristics of influences. The shallow rock-soil structure of each geomorphic unit in the area is obviously different. The depth of groundwater level is generally from 5m to 25m, but it is deeper in loess tableland, reaching at the depth of 60m. The comprehensive thermal conductivity coefficient in loess tableland is significantly lower than that in other rock-soil units. In the constant temperature layer at the depth of 20m to 120m, the average temperature and temperature gradient of regional distribution is 16℃ -18℃ and（ 1.5- 3.9） × 10 - 2℃/m respectively.

关 键 词：土壤源热泵 地埋管换热 岩土热物性 岩土热响应试验 区域分布 

分 类 号：TK529[动力工程及工程热物理—热能工程]