Hydraulic drive type hydrogen compressor for hydrogen refueling station
By introducing valves, sensors, and a PLC controller into a liquid-driven hydrogen compressor, the pressure boosting strategy is dynamically adjusted, solving the problem of a fixed pressure boosting strategy in liquid-driven hydrogen compressors and achieving a highly efficient and energy-saving pressure boosting effect.
Patent Information
- Application Number
- CN202520354629.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-03-03
AI Technical Summary
The existing liquid-driven hydrogen compressors have a fixed boosting strategy that cannot be adjusted according to changes in operating conditions, resulting in an suboptimal boosting strategy that affects the efficiency and energy consumption of hydrogen refueling stations.
By combining valves and sensors with a PLC controller, pressure and temperature are monitored in real time, and the parallel and series connection of booster cylinders are dynamically adjusted to achieve a flexible boosting strategy.
It has achieved high-efficiency and energy-saving pressurization of liquid-driven hydrogen compressors for hydrogen refueling stations under different operating conditions, and improved the filling rate and energy efficiency of hydrogen storage cylinder groups.
Smart Images
Figure CN223578182U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hydrogen compressor adjustment field, more specifically, the utility model relates to a kind of liquid drive type hydrogen compressor for hydrogenation station. BACKGROUND
[0002] Liquid drive type hydrogen compressor uses hydraulic oil as driving medium, and realizes the suction and compression of hydrogen by driving piston. It is simple in structure, convenient to maintain, can work stably in a large pressure range, and has strong adaptability and can be started and stopped at any time. In recent years, it has been widely used in hydrogenation station.
[0003] Considering that the long tube trailer unloads hydrogen to 5MPa and the hydrogen storage bottle group is 45MPa, the pressure ratio under this working condition is 9. Therefore, the liquid drive type hydrogen compressor in the hydrogenation station generally adopts two-stage pressurization to compress the hydrogen in the long tube trailer and store it in the hydrogen storage bottle group for station use.
[0004] Currently, the pressurization strategy of liquid drive type hydrogen compressor is fixed as one-stage and two-stage staged pressurization, and cannot change with working condition. Moreover, since the upstream of compressor is long tube trailer and the downstream is hydrogen storage bottle group for station use, the upstream pressure gradually decreases and the downstream pressure gradually increases during operation. Therefore, the fixed pressurization strategy can lead to suboptimal pressurization strategy, and a liquid drive type hydrogen compressor facilitating pressurization adjustment needs to be developed. SUMMARY
[0005] To achieve these objects and other advantages in accordance with the present utility model, on one hand, a preferred embodiment of the present utility model provides a liquid drive type hydrogen compressor for hydrogenation station, comprising a pressurization cylinder, an inlet pipeline, an outlet pipeline, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a first pressure sensor, a second pressure sensor, a first temperature sensor, a second temperature sensor and a PLC controller.
[0006] Among them, the second valve, the third valve and the fourth valve are arranged between the inlet pipeline and the outlet pipeline, the first valve is installed on the inlet pipeline, and the fifth valve is installed on the outlet pipeline.
[0007] The second valve, the pressurization cylinder and the third valve are arranged in parallel, the first-stage inlet and the second-stage inlet of the pressurization cylinder are respectively connected to the gas inlet and the gas outlet of the second valve, and the first-stage outlet and the second-stage outlet of the pressurization cylinder are respectively connected to the gas inlet and the gas outlet of the third valve; the second valve and the fourth valve are arranged in series.
[0008] The first pressure sensor and the first temperature sensor are also installed on the inlet pipeline.
[0009] The PLC controller controls the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the first pressure sensor and the first temperature sensor.
[0010] According to a preferred embodiment of the present application, a second pressure sensor and a second temperature sensor are further installed on the outlet pipeline.
[0011] According to a preferred embodiment of the present application, a third pressure sensor and a third temperature sensor are further installed on the series pipeline of the second valve and the fourth valve.
[0012] According to a preferred embodiment of the present application, the booster cylinder is embedded with a piston displacement sensor to monitor the movement state of the piston in the booster cylinder in real time.
[0013] The present application has at least the following advantages: the hydrogenation station liquid drive type hydrogen compressor can dynamically adjust the pressure boosting strategy according to the change of upstream and downstream working conditions, and high efficiency and energy saving effects are achieved.
[0014] Other advantages, objects and features of the present application will be apparent from the following description, and will be understood by those skilled in the art. BRIEF DESCRIPTION OF DRAWINGS
[0015] Fig. 1 Figure 1 is a schematic diagram of the frame structure of the hydrogenation station liquid drive type hydrogen compressor in the present application.
[0016] Fig. 2 Figure 2 is a schematic diagram of the frame structure of the hydrogenation station liquid drive type hydrogen compressor in one embodiment of the present application in two-stage parallel pressure boosting of the booster cylinder.
[0017] Fig. 3 Figure 3 is a schematic diagram of the frame structure of the hydrogenation station liquid drive type hydrogen compressor in another embodiment of the present application in two-stage series pressure boosting of the booster cylinder. DETAILED DESCRIPTION
[0018] The present application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the present application according to the description.
[0019] The following description is provided to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only examples, and other obvious modifications can be made by those skilled in the art. The basic principles of the present application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.
[0020] Those skilled in the art shall understand that in the disclosure of the utility model, the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the utility model.
[0021] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.
[0022] As Figs. 1-3 shown, in one aspect, a preferred embodiment of the utility model provides a liquid drive type hydrogen compressor for hydrogen refueling station, including including booster cylinder 10, import pipeline 11, export pipeline 12, first valve 1, second valve 2, third valve 3, fourth valve 4, fifth valve 5, first pressure sensor 6, second pressure sensor 7, first temperature sensor 8, second temperature sensor 9 and PLC controller;
[0023] Wherein, the second valve 2, third valve 3, fourth valve 4 are arranged between import pipeline 11 and export pipeline 12, the first valve 1 is installed on the import pipeline 11, and the fifth valve 5 is installed on the export pipeline 12;
[0024] The second valve 2, booster cylinder 10 and the third valve 3 are arranged in parallel, the first-stage import and second-stage import of the booster cylinder are connected with the gas inlet and gas outlet of the second valve respectively, and the first-stage export and second-stage export of the booster cylinder are connected with the gas inlet and gas outlet of the third valve respectively, and the second valve 2 and the fourth valve 4 are arranged in series;
[0025] The first pressure sensor 6 and the first temperature sensor 8 are further installed on the import pipeline;
[0026] The PLC controller is connected with the first valve 1, the second valve 2, the third valve 3, the fourth valve 4, the fifth valve 5, the first pressure sensor 6 and the first temperature sensor 8.
[0027] The first pressure sensor detects the hydrogen inlet pressure in real time, and the PLC controller compares the pressure ratio with the preset outlet pressure, if the pressure ratio is within the preset value range, the PLC controller controls the fourth valve to be closed, and the second valve, the third valve and the fifth valve to be opened, so that two-stage parallel pressurization of the pressurizing cylinder is realized, if the pressure ratio exceeds the preset value, the PLC controller controls the second valve and the third valve to be closed, and the fourth valve and the fifth valve to be opened, so that two-stage series pressurization of the pressurizing cylinder is realized.
[0028] After the fourth valve is opened, hydrogen enters the first-stage inlet of the pressurizing cylinder during pressurization, is discharged through the first-stage outlet, realizes first-stage pressurization, enters the second-stage inlet of the pressurizing cylinder through the fourth valve 4, and is discharged through the second-stage outlet, realizes second-stage pressurization, or after the fourth valve is opened, the fourth valve, the first-stage inlet, the first-stage outlet, the second inlet and the second-stage outlet of the pressurizing cylinder are connected in series, that is, the first-stage pressurization and the second-stage pressurization are connected in series.
[0029] In the above technical scheme, based on the pressurization process of the hydrogen refueling station, it is considered that the pressurization of hydrogen at the inlet and outlet of the compressor is small in the early stage of pressurization, at this time, the original series connection of the first stage and the second stage is changed into parallel connection of the first stage, which can greatly improve the displacement of the compressor in the initial stage of the pressurization process and increase the filling rate of the hydrogen storage bottle group, when entering the middle and late stage of the pressurization process, the pressurization of hydrogen at the inlet and outlet of the compressor is large at this time, at this time, the parallel connection of the first stage is changed into series connection of the first stage and the second stage, and the pressurization ratio of the first stage and the second stage is distributed, so that the optimal isobaric pressurization mode is realized, and the energy consumption is reduced.
[0030] The temperature sensor is mainly used for detecting the pipeline temperature.
[0031] According to a preferred embodiment of the utility model, the pressurizing cylinder is embedded with a piston displacement sensor to monitor the movement state of the piston in the pressurizing cylinder in real time, for example, the displacement of the piston can be used to detect the displacement and pressure of the pressurizing cylinder, if the movement state of the piston can be accurately known, the performance of the pressurizing cylinder can be known.
[0032] According to a preferred embodiment of the utility model, a second pressure sensor 7 and a second temperature sensor 9 are further installed on the outlet pipeline.
[0033] According to a preferred embodiment of the utility model, a third pressure sensor 13 and a third temperature sensor 14 are further installed on the series connection pipeline of the second valve 2 and the fourth valve 4. The third pressure sensor and the third temperature sensor are used as the sensors of the outlet of the first-stage pressurizing cylinder after switching the first-stage pressurization and the second-stage pressurization, and the two sensors are needed for the first-stage pressurization.
[0034] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.
Claims
1. A liquid drive hydrogen compressor for hydrogen refueling stations, characterized in that, The device comprises a pressure cylinder, an inlet pipeline, an outlet pipeline, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a first pressure sensor and a second pressure sensor; wherein the second valve, the third valve and the fourth valve are arranged between the inlet pipeline and the outlet pipeline, the first valve is installed on the inlet pipeline, and the fifth valve is installed on the outlet pipeline; the second valve, the pressure cylinder and the third valve are arranged in parallel, the first-stage inlet and the first-stage outlet of the pressure cylinder are connected with the gas inlet and the gas outlet of the second valve respectively, and the second-stage inlet and the second-stage outlet of the pressure cylinder are connected with the gas inlet and the gas outlet of the third valve respectively; the second valve and the fourth valve are arranged in series; the first pressure sensor is further installed on the inlet pipeline, and the second pressure sensor is further installed on the outlet pipeline.
2. The liquid drives hydrogen compressor for hydrogen refueling stations according to claim 1, characterized in that, A first temperature sensor is further installed on the inlet pipeline, and a second temperature sensor is further installed on the outlet pipeline.
3. The liquid drives hydrogen compressor for hydrogen refueling stations according to claim 1, characterized in that, A third pressure sensor and a third temperature sensor are further installed on the series pipeline of the second valve and the fourth valve.
4. The liquid drives hydrogen compressor for hydrogen refueling stations according to claim 3, characterized in that, The device further comprises a PLC controller which is connected with the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the first pressure sensor.
5. The liquid drives hydrogen compressor for hydrogen refueling stations according to claim 1, characterized in that, A piston displacement sensor is embedded in the pressure cylinder to monitor the movement state of the piston in the pressure cylinder in real time.