using tubes closed at one end, i.e. return-type tubes

Full Title

Geothermal collectors > with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground > using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes > using tubes closed at one end, i.e. return-type tubes

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

HEATING; RANGES; VENTILATING

Subclass:

GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS