KR-102962022-B1 - HYDROGEN COMPRESSING SYSTEM

KR102962022B1KR 102962022 B1KR102962022 B1KR 102962022B1KR-102962022-B1

Abstract

The present invention relates to a hydrogen compression system. The system may include: a first hydrogen compression unit having a first hydrogen compression space on one side of an internal space; a second hydrogen compression unit disposed opposite to the first hydrogen compression unit and having a second hydrogen compression space on the other side of an internal space; a hydraulic drive unit connected between the first hydrogen compression unit and the second hydrogen compression unit; and a compression rod disposed across the first hydrogen compression unit, the hydraulic drive unit, and the second hydrogen compression unit, such that by reciprocating motion, one end of the rod can compress hydrogen in the first hydrogen compression space and the other end can compress hydrogen in the second hydrogen compression space.

Inventors

권오철

Assignees

한영테크노켐(주)

Dates

Publication Date: 20260507
Application Date: 20240524

Claims (9)

A hydrogen compression section having a hydrogen compression space in which hydrogen is introduced and compressed; A liquid seal filling section disposed on one side of the above-mentioned hydrogen compression section and filled with an incompressible fluid; A hydraulic drive unit positioned on the opposite side of the hydrogen compression unit with the liquid seal filling unit in between; and It includes a compression rod that is arranged across the hydrogen compression section, the liquid seal filling section, and the hydraulic drive section and reciprocates, and can compress hydrogen within the hydrogen compression space as it moves. A guide region is formed in which a guide member is disposed on the compression rod disposed within the hydrogen compression space, and The above guide region forms a gap from the inner surface of the hydrogen compression space, and A hydrogen compression system wherein the guide members are disposed within the spacing gap and are spaced apart from each other along the circumference of the compression rod, and each of the guide members extends radially such that its end contacts the inner circumference of the hydrogen compression space, and the plurality of guide members align the center of the movement path of the compression rod with the center of the hydrogen compression space without closing the spacing gap.
In paragraph 1, The above hydrogen compression unit includes a first hydrogen compression unit and a second hydrogen compression unit positioned on opposite sides of each other with the hydraulic drive unit in between, The first hydrogen compressor, the hydraulic drive unit, and the second hydrogen compressor have a coaxial structure arranged along the same central axis, and A hydrogen compression system in which one end can compress hydrogen in a first hydrogen compression space and the other end can compress hydrogen in a second hydrogen compression space by the reciprocating motion of the above-mentioned compression rod.
In paragraph 2, A hydrogen compression system in which a hydrogen transfer pipe is connected between the first hydrogen compression unit and the second hydrogen compression unit to transfer hydrogen that has been compressed first in the first hydrogen compression space to the second hydrogen compression space.
In paragraph 3, A hydrogen compression system in which an intermediate cooler is installed in the hydrogen transfer pipe to cool the hydrogen that has been primarily compressed in the first hydrogen compression space before reaching the second hydrogen compression space.
In paragraph 2, The internal space of the above hydraulic drive unit includes a first hydraulic fluid space formed on the side of the first hydrogen compression unit and a second hydraulic fluid space formed on the side of the second hydrogen compression unit. A hydrogen compression system in which the first hydraulic fluid space and the second hydraulic fluid space are separated by a driving piston that reciprocates left and right.
In paragraph 1, A hydrogen compression system in which the guide region of the above-mentioned compression rod is formed at the end of the above-mentioned compression rod and is formed with a stepped shape such that the diameter decreases from the body region.
In paragraph 1, A hydrogen compression system in which the above-mentioned gap is 0.3 to 0.5 mm or less.
In paragraph 2, A hydrogen compression system having a liquid seal filling section disposed between the first hydrogen compression section and the hydraulic drive section, and between the hydraulic drive section and the second hydrogen compression section, respectively, the liquid seal filling section having a liquid seal receiving section through which the compression rod passes, and a liquid seal filling port for filling the incompressible fluid into the liquid seal receiving section.
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Description

Hydrogen Compression System The present invention relates to a hydrogen compression system for supplying hydrogen gas compressed to a high-pressure state. A fuel cell system installed in vehicles and mobility devices using fuel cells comprises a fuel cell stack that generates electrical energy, a fuel supply system that supplies fuel (hydrogen) to the fuel cell stack, an air supply system that supplies oxygen from the air—an oxidant necessary for the electrochemical reaction in the fuel cell stack—and a heat and water management system that controls the operating temperature of the fuel cell stack. The fuel supply system, that is, the hydrogen supply system, comprises a hydrogen tank for hydrogen refueling and a regulator mounted on the inlet side of the hydrogen tank to reduce the pressure of high-pressure hydrogen inside the tank and supply it to the fuel cell stack. At this time, hydrogen must be compressed and stored at a predetermined high pressure (about 700 bar or more) in the hydrogen tank of the fuel cell vehicle to supply hydrogen fuel to the fuel cell stack. To this end, hydrogen refueling stations are equipped with hydrogen compressors for compressing hydrogen to high pressure for refueling. After compressing hydrogen to high pressure through the compressor, it is stored in a high-pressure hydrogen storage tank and then refueled into the hydrogen tanks of automobiles and various mobility devices via a refueling unit. As a core piece of equipment for hydrogen refueling stations, the hydrogen compressor requires stability under high pressure, and hazardous factors such as high-pressure rupture and hydrogen leakage must be prevented. Generally, hydrogen compressors use diaphragm and piston types. The diaphragm type compresses hydrogen gas by moving a diaphragm, which is a circular metal plate, using hydraulic power. The piston type compresses hydrogen gas using the pressure of a hydraulic piston that reciprocates inside a cylinder. Meanwhile, an ionic compressor that compresses hydrogen by injecting ionic liquid into the top of a piston is also known. Ionic liquid refers to an organic substance made into a liquid state by heating and melting salts and oxides that are solid at room temperature. As such, ionic liquids are incompressible materials that do not undergo volume change even under high pressure, and various materials have been developed and are in use. Leakage during the hydrogen compression process can be very dangerous, and existing systems require various mechanical devices to prevent leakage. In particular, diaphragm-type or piston-type compressors have the potential for leakage due to sealing issues at high pressures. Korean Registered Patent No. 10-2540129 applies a hydrogen compression seal to the compression piston to prevent hydrogen movement between two hydrogen compression spaces, but it is difficult to completely prevent hydrogen leakage due to the limitations of the compression seal. Furthermore, the possibility of aging or damage to the hydrogen compression seal cannot be ruled out. Furthermore, high-pressure hydrogen compressors are subject to significant mechanical stress due to high pressure, which can lead to issues with the equipment's stability and durability. Additionally, the equipment is prone to wear and fatigue from prolonged use, requiring regular maintenance and parts replacement. FIG. 1 is a side cross-sectional view illustrating a hydrogen compression system according to the present invention. FIG. 2 illustrates one side of the hydrogen compression system of FIG. 1, and is a partial side cross-sectional view showing an enlarged guide member of the compression rod. Hereinafter, specific details for implementing the present invention will be described with reference to the attached drawings. Furthermore, in describing the present invention, detailed descriptions of related known functions are omitted if they are deemed obvious to a person skilled in the art and could unnecessarily obscure the essence of the invention. FIG. 1 is a side cross-sectional view illustrating a hydrogen compression system according to the present invention. FIG. 2 is a partial side cross-sectional view illustrating one side of the hydrogen compression system of FIG. 1, showing an enlarged guide member of a compression rod. Referring to FIGS. 1 and 2, a hydrogen compression system according to an embodiment of the present invention includes a first hydrogen compression unit (100), a second hydrogen compression unit (200), a hydraulic drive unit (300), and a compression rod (400). A hydrogen compression system according to an embodiment of the present invention may further include a hydrogen transfer pipe (500), a liquid seal filling unit (600), and partitions (700). The first hydrogen compression unit (100) is formed in the shape of a hollow cylinder and has a first hydrogen compression space (110) on one side of the internal space. The first hydrogen compression space (110) is formed as a