Method of controlling the hydraulic fluid pressure of a diaphragm compressor
AssigneeNel Hydrogen A/S
InventorsJoshua Andrew Adams, Alexander George Murashko, Jr.
Life of this patent
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Abstract
A method of controlling the injection of hydraulic fluid into a high pressure diaphragm compressor having a hydraulic system, the method including: measuring a representation of pressure in a high-pressure part of the hydraulic system of the diaphragm compressor, and maintaining a desired pressure in the high-pressure part of the hydraulic system by adding hydraulic fluid to the high-pressure part of the hydraulic system under the control of a controller on the basis of the measuring of pressure.
Claims23
A method of controlling the injection of hydraulic fluid into a high-pressure diaphragm gas compressor comprising a hydraulic system comprising a low-pressure part and a high-pressure part, the method comprising:
- measuring pressure in the high-pressure part of the hydraulic system of the diaphragm gas compressor, the high-pressure part includes a lower compressor head having a hydraulic fluid chamber separated from an upper compressor head having a gas chamber by a diaphragm, and
- maintaining a desired pressure in the high-pressure part of the hydraulic system by adding hydraulic fluid to the hydraulic fluid chamber of the high-pressure part of the hydraulic system from an injection assembly of the low-pressure part, the injection assembly comprising an injection pump, an output valve and another valve, and
- wherein a pressure potential in the injection assembly between said another valve, the output valve and the injection pump is established, under the control of a controller controlling the injection pump and said another valve on the basis of said measured pressure;
- and
- wherein said adding the hydraulic fluid to the hydraulic fluid chamber occurs when the pressure potential in the injection assembly exceeds the pressure in the high pressure part of the hydraulic system.
A diaphragm compressor for pressurizing a gas to a pressure between 10 MPa and 110 MPa, the diaphragm compressor comprising:
- an injection assembly forming part of a hydraulic fluid path between a low-pressure part of the hydraulic system and a high-pressure part, the high-pressure part includes a lower compressor head having a hydraulic fluid chamber separated from an upper compressor head having a gas chamber by a diaphragm, the injection assembly comprising an injection pump, an output valve and another valve,
- a pressure sensor adapted to establish a feedback signal representing pressure in the high-pressure part, and
- a controller adapted to control the injection assembly so as to establish a pressure potential of injection of hydraulic fluid based on the feedback signal and a hydraulic fluid peak pressure target value of a desired pressure of hydraulic fluid in the high-pressure part;
- wherein said controller and said injection assembly add the hydraulic fluid to the hydraulic fluid chamber when the pressure potential in the injection assembly exceeds the pressure in the high pressure part of the hydraulic system.
Dependencies are inferred from the claim text.