The longest thermometer in Germany

Special vehicle for deep geothermal energy handed over to scientists

Geothermal drilling © DOE / NREL
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The longest thermometer in Germany is now serving at the Institute for Geoscientific Community Tasks (GGA Institute) in Hanover. In the future, it will be used for high-precision temperature measurements in deep wells of geothermal research.

The instrument records the measuring depths to the nearest centimeter and precisely registers temperature changes to a thousandth of a degree. From the results of the measurements, geoscientists gain extensive information about the thermal and hydraulic properties of the deep subsurface.

6, 000 meters long measuring cable

The new special measuring vehicle was commissioned by the GGA Institute on 3 December 2008. A winch with 6, 000 meters of steel cable measuring cable is mounted on the new truck. This cable drops highly sensitive temperature probes and other gauges down the wells.

The technical equipment of the measuring vehicle was developed and installed by three medium-sized companies in Lower Saxony and Saxony-Anhalt to exact specifications of the scientists and engineers of the GGA Institute.

Practical test in spring 2009

Exciting and important questions are in the research program of the GGA Institute: How much and how quickly does heat flow from the earth's interior when using geothermal energy and how much heat energy is available and can be used? In solving such problems, the new measuring system should soon help. display

One of his first missions will be at the 4, 000-meter deep well of the geothermal field laboratory of the GEOZENTRUM Hannover in Horstberg near Uelzen. Soon after that, in the spring of 2009, the field trial will be scheduled for the geothermal deep well GeneSys in Hannover-Großbuchholz. However, before that, staff at the institute will carry out a comprehensive system check and retrofit additional electronic equipment.

Low-lying geothermal energy in sight

The GGA Institute is an independent research institute for applied geosciences with a geophysical orientation. Its employees have the task of investigating structures, conditions and processes in the anthropogenically influenced subsoil in advance and as a result of economic exploitation and protection of the environment. In order to solve these questions, they should also develop new instrument systems, measurement methods and interpretation methods. Deep geothermal energy is one of the institute's most important research fields.

(GEOZENTRUM Hannover / Federal Institute for Geosciences and Natural Resources (BGR) / Institute for Geoscience Joint Tasks, 09.12.2008 - DLO)