F24TGEOTHERMAL COLLECTORSGEOTHERMAL SYSTEMS F24T10/00 F24T10/00Geothermal collectors F24T10/10with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground F24T10/13using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes F24T10/15using bent tubesusing tubes assembled with connectors or with return headers F24T10/17using tubes closed at one end, i.e. return-type tubes F24T10/20using underground water as working fluidusing working fluid injected directly into the ground, e.g. using injection wells and recovery wells F24T10/30using underground reservoirs for accumulating working fluids or intermediate fluids F24T10/40operated without external energy sources, e.g. using thermosiphonic circulation or heat pipes F24T2010/50Component parts, details or accessories F24T2010/53Methods for installation F24T2010/56Control arrangements F24T50/00Geothermal systems for producing mechanical power from geothermal energy F03G7/04 F24T2201/00PredictionSimulation