Method for downloading a hydrogen tank in parabolic trough collectors

Method for downloading a hydrogen tank in manifolds parabolic cylinder. # The present invention describes a method for downloading a hydrogen tank that is located in the annular space (3) of a manifold (4), especially for solar collectors, being formed the annular space (3) by at least one outer casing tube (2) and an inner absorber tube (1) of the collecting tube (4) and joining the outer casing tube (2) to the absorber tube (1) by a wall (5). The process is characterized under an inert gas atmosphere a first orifice (O1) extending through the casing tube (2) or the wall (5) is generated, penetrating the annular space (3) inert gas through the first orifice ( O1), arranged below so gastight above the first opening (O1) a processing chamber (101) with a connection to a vacuum pump (30), evacuated tube collector (3) through the first hole ( O1) and thereupon closing the first opening (O1) so gastight.