A supercharging device is configured to increase an amount of intake air of an engine of a vehicle, where the supercharging device includes a chamber formed to be open in an ejecting direction of a compressor outside an ejecting portion of a compressor housing of the compressor, and an air adding device configured to supply air not compressed by the compressor to the chamber.

A method, apparatus, system, and computer program product for managing pumps in an aircraft. Flight information about an operation of the pumps in a pump package in the aircraft is received by a computer system. The flight information is received from the aircraft. A number of times that an abnormal switching occurred for the pumps within a window of consecutive flights is determined by the computer system when the abnormal switching is identified from the flight information. A set of actions is performed by the computer system when the abnormal switching occurred a number of times for the pumps within the window of consecutive flights that exceeds a set of thresholds for the abnormal switching that is considered healthy for the pumps.

A method, apparatus, system, and computer program product for managing pumps in an aircraft. Flight information about an operation of the pumps in a pump package in the aircraft is received by a computer system. The flight information is received from the aircraft. A number of times that an abnormal switching occurred for the pumps within a window of consecutive flights is determined by the computer system when the abnormal switching is identified from the flight information. A set of actions is performed by the computer system when the abnormal switching occurred a number of times for the pumps within the window of consecutive flights that exceeds a set of thresholds for the abnormal switching that is considered healthy for the pumps.

A portable blowing device configured for being worn around a neck of a human body, includes two arms each defining an airflow channel therein; and fans received in the arms respectively. The arm includes an inner side wall close to the neck and an outer side wall connected to the inner side wall. The arm includes an air inlet and an air outlet in communication with the airflow channel respectively. The air inlet is arranged at the inner side wall and/or the outer side wall. The fan is configured to generate an airflow passing through the air inlet, the airflow channel and the air outlet in sequence.

Method to operate a vacuum system comprising at least a first vacuum pump and a second vacuum pump wherein the first vacuum pump and the second vacuum pump are connectable to a vacuum chamber to maintain a set pressure inside the vacuum chamber. The first vacuum pump is a Variable Speed Drive pump wherein the first vacuum pump and the second vacuum pump are connected in series. The method comprises the steps of controlling the performance of the first vacuum pump and the performance of the first vacuum pump is controlled to be equal to or higher than the performance of the second vacuum pump while maintaining the set pressure in the vacuum chamber.

Method to operate a vacuum system comprising at least a first vacuum pump and a second vacuum pump wherein the first vacuum pump and the second vacuum pump are connectable to a vacuum chamber to maintain a set pressure inside the vacuum chamber. The first vacuum pump is a Variable Speed Drive pump wherein the first vacuum pump and the second vacuum pump are connected in series. The method comprises the steps of controlling the performance of the first vacuum pump and the performance of the first vacuum pump is controlled to be equal to or higher than the performance of the second vacuum pump while maintaining the set pressure in the vacuum chamber.

The invention relates to a method of installing a subsea system (1) comprising the steps of: —installing at least one first foundation structure (13′) on a seabed, wherein the first foundation structure (13′) comprises a connection interface (50′) connectable to a second foundation structure (13″), —installing a first compressor train on the foundation structure (13′), the first compressor train comprising at least a first compressor (8′), —connecting the first compressor train to at least one well flow line (2), —connecting a first compressed fluid line (9′) to an outlet (15′) of the first compressor (8′) and to a common outlet (16) for the compressed fluid in the subsea system (1), wherein the first compressed fluid line (9′) comprises a flow regulating device (24′), —connecting a first connection line (10′,12′) to the first compressed fluid line (9′) at a position upstream of the flow regulating device (24′) and/or to a line (2, 6′) at a position upstream of the first compressor (8), and wherein the first connection line (10′, 12′) is connectable to an additional compressor train positioned on the second foundation structure (13″), the first connection line (10′) comprising a flow regulation device (20′,22′), —connecting a second connection line (11′) to the first compressed fluid line (9′) at a position downstream of the flow regulation device (24′) and wherein the second connection line (11′) is connectable to the additional compressor train positioned on the second foundation structure (13″), the second connection line (11′) comprising a flow regulation device (21′). It is further described an associated a subsea system.

The invention relates to a method of installing a subsea system (1) comprising the steps of: —installing at least one first foundation structure (13′) on a seabed, wherein the first foundation structure (13′) comprises a connection interface (50′) connectable to a second foundation structure (13″), —installing a first compressor train on the foundation structure (13′), the first compressor train comprising at least a first compressor (8′), —connecting the first compressor train to at least one well flow line (2), —connecting a first compressed fluid line (9′) to an outlet (15′) of the first compressor (8′) and to a common outlet (16) for the compressed fluid in the subsea system (1), wherein the first compressed fluid line (9′) comprises a flow regulating device (24′), —connecting a first connection line (10′,12′) to the first compressed fluid line (9′) at a position upstream of the flow regulating device (24′) and/or to a line (2, 6′) at a position upstream of the first compressor (8), and wherein the first connection line (10′, 12′) is connectable to an additional compressor train positioned on the second foundation structure (13″), the first connection line (10′) comprising a flow regulation device (20′,22′), —connecting a second connection line (11′) to the first compressed fluid line (9′) at a position downstream of the flow regulation device (24′) and wherein the second connection line (11′) is connectable to the additional compressor train positioned on the second foundation structure (13″), the second connection line (11′) comprising a flow regulation device (21′). It is further described an associated a subsea system.

A backpack tool kit including a backpack assembly with a casing and a battery pack received in the casing; and at least one tool connected to the casing of the backpack assembly and electrically connected to the battery pack. The backpack tool apparatus can be provided with multiple tools to simultaneously realize different operations and functions. Moreover, the tools are configured to be detachably connected to the backpack assembly, and can be replaced with different tools to realize different operations and functions according to needs.

A backpack tool kit including a backpack assembly with a casing and a battery pack received in the casing; and at least one tool connected to the casing of the backpack assembly and electrically connected to the battery pack. The backpack tool apparatus can be provided with multiple tools to simultaneously realize different operations and functions. Moreover, the tools are configured to be detachably connected to the backpack assembly, and can be replaced with different tools to realize different operations and functions according to needs.