A skid-mounted hydrogen energy refueling station

Abstract

The utility model relates to a pry mounted hydrogen energy gas station, including frame, primary compressor, water cooling system, secondary compressor, buffer and hydrogenation machine, the air inlet of primary compressor communicates with hydrogen source loop branch pipe, the air inlet pipe of primary compressor is installed with check valve and always open valve, the air outlet pipe of primary compressor passes through hydrogen pipeline and the air inlet pipe of secondary compressor, buffer and hydrogenation machine are communicated in proper order, water cooling system is used for the heat exchange cooling of hydrogen that primary compressor and secondary compressor output, water cooling system includes water tank, water pump, interstage cooler and aftercooler, interstage cooler and aftercooler are communicated with water tank through water path respectively, interstage cooler is connected between primary compressor and secondary compressor through hydrogen pipeline, aftercooler is connected between secondary compressor and buffer through hydrogen pipeline. Adopt the frame structure of high integration, small, save installation space.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production equipment technology, and in particular to a skid-mounted hydrogen refueling station. Background Technology

[0002] Hydrogen energy is currently the most promising clean energy source, characterized by zero pollution, zero emissions, and low conversion efficiency. Traditional natural gas-to-hydrogen systems typically require customized on-site design and large-scale integrated construction, resulting in drawbacks such as high investment, large land area, long construction period, and inconvenient dismantling after completion. Skid-mounted systems, on the other hand, are modular devices that integrate various functional equipment onto a chassis made of angle steel or I-beams, offering advantages such as factory prefabrication and mobility. Their core advantage lies in the pre-installation of components such as valves, pumps, and instruments; only pipeline connections are needed on-site for operation, significantly shortening the construction period. Hydrogen refueling stations are to fuel cell vehicles what gas stations are to traditional gasoline vehicles and charging piles are to pure electric vehicles—an indispensable cornerstone supporting the development of the fuel cell vehicle industry. Existing hydrogen refueling stations have large land areas and complex structures, leading to high on-site assembly difficulties and long construction periods, thus requiring further improvement. Utility Model Content

[0003] Therefore, it is necessary to provide a skid-mounted hydrogen refueling station to address the above-mentioned problems.

[0004] A skid-mounted hydrogen refueling station includes a frame, a primary compressor, a water-cooling system, a secondary compressor, a buffer, and a hydrogen dispenser. The primary compressor, water-cooling system, secondary compressor, buffer, and hydrogen dispenser are all housed within the frame. The inlet of the primary compressor is connected to a branch pipe of the hydrogen source circuit. A check valve and a normally open valve are installed on the inlet pipe of the primary compressor. The outlet pipe of the primary compressor is sequentially connected to the inlet pipes of the secondary compressor, buffer, and hydrogen dispenser via hydrogen pipelines. The water-cooling system is used to exchange heat and cool the hydrogen output from the primary and secondary compressors. The water-cooling system includes a water tank, a water pump, an interstage cooler, and an aftercooler. The interstage cooler and aftercooler are respectively connected to the water tank via water lines. The interstage cooler is connected between the primary and secondary compressors via a hydrogen pipeline. The aftercooler is connected between the secondary compressor and the buffer via a hydrogen pipeline. The water pump drives the cooling liquid to circulate between the water tank and the interstage cooler and aftercooler.

[0005] Preferably, both the interstage cooler and the aftercooler include a tank and a spiral coil. The tank is horizontally positioned, and the spiral coil is disposed inside the tank and connected to a hydrogen pipeline.

[0006] Preferably, the frame includes an outer frame and an inner frame. The outer frame is square-shaped, and a plurality of the inner frames are welded inside the outer frame to fix the primary compressor, water cooling system, secondary compressor, buffer, and hydrogen dispenser.

[0007] Preferably, the intake pipe of the primary compressor also integrates a filter.

[0008] Preferably, the buffer includes several parallel connected bottles, each bottle being made of aluminum alloy with its outer surface wrapped with carbon fiber composite material. Each bottle is equipped with a shut-off valve, a safety valve, and a pressure gauge at its opening. The bottles are used to store hydrogen in stages based on the pressure gauge readings.

[0009] The advantages of this utility model are: the design adopts a highly integrated frame structure, which greatly shortens the construction cycle of hydrogen refueling stations; it is small in size, saves installation space; the integrated design facilitates transportation and is conducive to heat dissipation. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a skid-mounted hydrogen refueling station according to one embodiment; Figure 2 This is a schematic diagram of an interstage cooler. Detailed Implementation

[0011] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0012] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0014] like Figure 1As shown, a skid-mounted hydrogen refueling station includes a frame 1, a primary compressor 2, a water-cooling system 3, a secondary compressor 4, a buffer 5, and a hydrogen dispenser 6. The primary compressor 2, water-cooling system 3, secondary compressor 4, buffer 5, and hydrogen dispenser 6 are all housed within the frame 1. The inlet of the primary compressor 2 is connected to a branch pipe of the hydrogen source circuit. A check valve 21 and a normally open valve 22 are installed on the inlet pipe of the primary compressor 2. The outlet pipe of the primary compressor 2 is sequentially connected to the inlet pipes of the secondary compressor 4, buffer 5, and hydrogen dispenser 6 via hydrogen pipelines. The water-cooling system 3 uses… The water-cooling system 3, used for heat exchange and cooling of the hydrogen output from the primary compressor 2 and the secondary compressor 4, includes a water tank 31, a water pump 32, an interstage cooler 33, and an aftercooler 34. The interstage cooler 33 and aftercooler 34 are connected to the water tank 31 via water lines. The interstage cooler 33 is connected between the primary compressor 2 and the secondary compressor 4 via a hydrogen pipeline, and the aftercooler 34 is connected between the secondary compressor 4 and the buffer 5 via a hydrogen pipeline. The water pump 32 drives the cooling liquid to circulate between the water tank 31 and the interstage cooler 33 and aftercooler 34. Specifically, in this embodiment, the frame 1 is rectangular, used to protect and support the primary compressor 2, the water-cooling system 3, the secondary compressor 4, the buffer 5, and the hydrogen dispenser 6. The frame 1 facilitates the assembly of large components in the factory, allowing for integrated loading and transportation, reducing on-site workload. This design employs a two-stage compression system. The primary compressor 2 and the secondary compressor 4 are directly connected, saving space. Compared to single-stage compression to final pressure, two-stage compression avoids heat buildup in the hydrogen, making compression safer and reducing compressor energy consumption. The water-cooling system 3 cools the compressed hydrogen through heat exchange. The buffer 5 stores high-pressure hydrogen during refueling intervals, enabling rapid refueling during peak periods. This reduces direct reliance on the compressors, increases refueling speed, and protects both the secondary compressor 4 and the primary compressor 2. The hydrogen refueling machine 6 is equipped with a refueling nozzle, allowing users to directly dispense hydrogen. The water cooling system 3 in this design includes a water tank 31, a water pump 32, an interstage cooler 33, and an aftercooler 34. The water tank 31 has a built-in plate heat exchanger, which cools the returning cooling liquid. The water pump 32 then circulates the cooled liquid from the water tank 31 to the interstage cooler 33 and aftercooler 34 to absorb the heat energy carried by the passing hydrogen, thus completing the cooling process. This design adopts a highly integrated frame structure, significantly shortening the construction cycle of the hydrogen refueling station. It is compact, saves installation space, and its integrated design facilitates transportation and heat dissipation.

[0015] like Figures 1-2As shown, both the interstage cooler 33 and the aftercooler 34 include a tank 331 and a spiral coil 332. The tank 331 is horizontally placed, and the spiral coil 332 is disposed inside the tank 331 and is connected to a hydrogen pipeline. Specifically, the tank 331 is placed horizontally, filling it with coolant. The spiral coil 332 extends from both ends of the tank 331 and connects to the hydrogen pipeline. During operation, the spiral coil 332 is immersed in the coolant to complete heat exchange. The spiral coil 332 also extends the path of compressed hydrogen within the tank 331. Furthermore, the spiral coil 332 is integrated into the tank 331, which allows for a larger heat exchange area while reducing the volume of the tank 331. This makes it suitable for integration into compact skid-mounted equipment. When hydrogen flows along the spiral coil 332, the spiral pipe design generates a certain centrifugal force, forming a secondary circulation. This circulation effectively breaks up the stagnant layer near the pipe wall, enhances the mixing between fluids, and thus significantly improves the heat transfer coefficient of the media inside and outside the pipe.

[0016] like Figure 1 As shown, the frame 1 includes an outer frame 11 and inner frames 12. The outer frame 11 is square-shaped, and several inner frames 12 are welded inside the outer frame 11 to fix the primary compressor 2, water cooling system 3, secondary compressor 4, buffer 5, and hydrogen dispenser 6. Specifically, in this embodiment, the frame 1 is composed of L-shaped angle steel welded together, which is low in cost. The outer frame 11 plays a protective role, and the inner frames 12 are used to fix and install various components, achieving integrated assembly in the factory, reducing on-site assembly workload, and facilitating transportation operations.

[0017] Specifically, a filter is also integrated into the intake pipe of the first-stage compressor 2 to filter impurities in the input low-pressure hydrogen and improve the purity of the hydrogen.

[0018] like Figure 1 As shown, the buffer 5 includes several parallel and interconnected bottle bodies 51. Each bottle body 51 is made of aluminum alloy and its outer surface is wrapped with carbon fiber composite material. A shut-off valve, a safety valve, and a pressure gauge are installed at the bottle opening of each bottle body 51. The several bottle bodies 51 store hydrogen in stages based on the pressure gauge readings. Specifically, the aluminum alloy bottle body 51 has excellent resistance to hydrogen embrittlement, and the external carbon fiber composite material wrapping protects the bottle body 51. The overall lightweight design facilitates transportation.

[0019] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A skid-mounted hydrogen refueling station, characterized in that: The system includes a frame, a primary compressor, a water-cooling system, a secondary compressor, a buffer, and a hydrogen dispenser. The primary compressor, water-cooling system, secondary compressor, buffer, and hydrogen dispenser are all housed within the frame. The inlet of the primary compressor is connected to a branch pipe of the hydrogen source circuit. A check valve and a normally open valve are installed on the inlet pipe of the primary compressor. The outlet pipe of the primary compressor is sequentially connected to the inlet pipes of the secondary compressor, buffer, and hydrogen dispenser via hydrogen pipelines. The water-cooling system is used to exchange heat and cool the hydrogen output from the primary and secondary compressors. The water-cooling system includes a water tank, a water pump, an interstage cooler, and an aftercooler. The interstage cooler and aftercooler are respectively connected to the water tank via water lines. The interstage cooler is connected between the primary and secondary compressors via a hydrogen pipeline. The aftercooler is connected between the secondary compressor and the buffer via a hydrogen pipeline. The water pump drives the cooling liquid to circulate between the water tank and the interstage cooler and aftercooler.

2. The skid-mounted hydrogen refueling station as described in claim 1, characterized in that: Both the interstage cooler and the aftercooler include a tank and a spiral coil. The tank is horizontally positioned, and the spiral coil is installed inside the tank and connected to a hydrogen pipeline.

3. The skid-mounted hydrogen refueling station as described in claim 1, characterized in that: The frame includes an outer frame and an inner frame. The outer frame is square in shape, and several inner frames are welded inside the outer frame to fix the primary compressor, water cooling system, secondary compressor, buffer, and hydrogen dispenser.

4. A skid-mounted hydrogen refueling station as described in claim 1, characterized in that: The intake pipe of the primary compressor also integrates a filter.

5. A skid-mounted hydrogen refueling station as described in claim 1, characterized in that: The buffer includes several parallel connected bottles. The bottles are made of aluminum alloy and the outer surface is wrapped with carbon fiber composite material. The bottle mouth is equipped with a shut-off valve, a safety valve and a pressure gauge. The bottles store hydrogen in stages according to the pressure gauge readings.

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