The construction of dynamic monitoring network for the development and utilization of shallow geothermal energy in Tianjin

Abstract：Tianjin is one of the experimental cities for shallow geothermal energy development and utilization in China, and experiments in selected places have already been finished, with the formation of “Tianjin mode”, i.e., “investigation first, planning follow-up, project demonstration, monitoring in place and policy guarantee”. Dynamic monitoring, as one of the important tasks, has made great progress. According to the geological condition and the present situation of development and utilization of shallow geothermal energy in Tianjin, the principle and technical requirements of dynamic monitoring network has been drawn up; eleven monitoring stations consisting of layer temperature, operating system and a combination of them have been constructed, with the building of the test base and dynamic monitoring center, and the monitoring data have been transmitted wirelessly through GPRS network; the combination of production, the monitoring equipment, instruments and software such as "serial formation of fine distribution and transmission temperature measurement acquisition system" have been developed, with the application for 14 national patents; according to the summary and analysis of the construction experience, "Tianjin pipe ground-source heat pump dynamic monitoring rules” has been drafted. The authors hold that the achievements of Tianjin will offer valuable experience for shallow geothermal energy projects in other provinces.