Abstract: A propulsion unit is disclosed with a hollow strut having an upper portion with an upper end portion passing through a passage (P1) formed between a first outer bottom and a second inner bottom in a vessel. The upper end portion is rotatably supported with a slewing bearing and sealed with a slewing seal towards the vessel. A cooling arrangement includes a cooling air duct system, at least one fan and at least one cooling unit. The slewing seal can include an upper slewing seal and a lower slewing seal at a vertical distance (H1) from each other with a space formed between the slewing seals. The upper end portion has openings (O1) into the space between the slewing seals. A first cooling air duct is directed to this space, whereby cooling air (L1) can be circulated through the first cooling air duct (400) into the space and through the openings (O1) in the upper end portion to the interior of the strut, or return air (L2) can be circulated from the strut in an opposite direction.

Abstract: A conveying system and a method for registering service requests in a conveying system, including at least one transport device, is provided. A detection area bounded on a floor surface is in connection with the transport device, in which detection area the identification data contained in the personal identifiers of passengers is read. The service profiles of passengers who have arrived in the detection area and/or who have left the detection area are determined on the basis of the identification data, and a service request according to the service profiles is registered for transporting and/or admitting passengers in the detection area to the location indicated by the service request.

Abstract: A propulsion unit is disclosed with a hollow strut having an upper portion with an upper end portion passing through a passage (P1) formed between a first outer bottom and a second inner bottom in a vessel. The upper end portion is rotatably supported with a slewing bearing and sealed with a slewing seal towards the vessel. A cooling arrangement includes a cooling air duct system, at least one fan and at least one cooling unit. The slewing seal can include an upper slewing seal and a lower slewing seal at a vertical distance (H1) from each other with a space formed between the slewing seals. The upper end portion has openings (O1) into the space between the slewing seals. A first cooling air duct is directed to this space, whereby cooling air (L1) can be circulated through the first cooling air duct (400) into the space and through the openings (O1) in the upper end portion to the interior of the strut, or return air (L2) can be circulated from the strut in an opposite direction.

Abstract: The present invention discloses a conveying system and a method for registering service requests in a conveying system, which comprises at least one transport device. A detection area bounded on a floor surface is in connection with the transport device, in which detection area the identification data contained in the personal identifiers of passengers is read. The service profiles of passengers who have arrived in the detection area and/or who have left the detection area are determined on the basis of the identification data, and a service request according to the service profiles is registered for transporting and/or admitting passengers in the detection area to the location indicated by the service request.