基于热响应试验地埋管分层热物性研究

Thermophysical Properties of Buried Pipe Layers Based on Thermal Response Test

以浅层土壤源热泵工程试验孔岩土换热条件下热物性测试为背景,在试验孔内分层布设测温装置,通过孔内原始温度场监测,进行热响应过程温度场及干扰后温度场恢复状态数据记录,研究土壤源热泵系统热响应过程温度场变化规律,供运行期地温场变化分析参考。结合室内岩土热物性试验,通过现场岩土体热响应试验,运用传热学不同计算方法,对浅层土壤源热泵系统分层岩土体热物性参数计算分析,对比得出分层热物性测试参数值较为可靠,为优化设计提供理论依据。

Based on the thermal physical property test of shallow ground source heat pump engineering test hole under geotechnical heat transfer conditions,a temperature measuring device is layered in the test hole,through monitoring the original temperature field in the hole,the temperature field in the thermal response process and the state data of temperature field recovery after interference are recorded,and the temperature field variation law in the thermal response process of ground source heat pump system is studied for reference in the analysis of ground temperature field variation during operation period.Combined with indoor geothermal physical property test,through field geothermal response test and different calculation methods of heat transfer,the thermal physical property parameters of stratified geotechnical body in shallow ground source heat pump system are calculated and analyzed,the comparison shows that the test parameters of stratified geothermal property are more reliable,which provides a theoretical basis for optimum design.