Liquid hydrogen skid-mounted hydrogenation heat exchange system of high-flow plunger pump

Abstract

The utility model relates to the technical field of liquid hydrogen storage, in particular to a liquid hydrogen skid-mounted hydrogenation heat exchange system of a high-flow plunger pump. Comprising a liquid hydrogen storage tank, the bottom of the liquid hydrogen storage tank is connected with a booster cavity liquid inlet of a plunger pump through a liquid inlet pipeline, a booster cavity top exhaust port of the plunger pump is connected with the liquid hydrogen storage tank through a gas return pipeline, a liquid outlet of the plunger pump is connected with an inlet of a heat exchanger through a pipeline, and an outlet of the heat exchanger is connected with a hydrogen storage bottle set through a pipeline. The hydrogen storage bottle group is connected with the hydrogen cooler through a pipeline; the hydrogen cooler is connected with the hydrogen hydrogenation machine through a pipeline; the heat exchanger is connected with a heat source generated by the hydrogen fuel cell for heat exchange, and the hydrogen fuel cell is connected with the charging pile. The plunger pump has the advantages of high pressure and large flow, the hydrogenation speed is high, the large-flow hydrogenation requirement can be met in the hydrogenation peak period, heat exchange can be fully conducted among the hydrogen fuel cell, the heat exchanger and the hydrogen cooler, and a large amount of energy is saved.

Description

Technical fields:

[0001] This utility model relates to the field of liquid hydrogen storage technology, and in particular to a liquid hydrogen skid-mounted hydrogen refueling and heat exchange system with a high-flow-rate plunger pump. Background technology:

[0002] Currently, most hydrogen refueling skid-mounted stations only have hydrogen refueling capabilities, which is relatively limited. Given the small market share of hydrogen fuel cell vehicles compared to the large market share of electric vehicles, charging infrastructure is severely inadequate. If hydrogen could be used to generate electricity at hydrogen refueling skid-mounted stations and then used to charge electric vehicles via charging piles, it would greatly supplement the existing charging infrastructure and fully utilize the energy and space advantages of the hydrogen refueling skid-mounted stations.

[0003] In addition, when liquid hydrogen is transported out of the storage tank, ordinary booster pumps are generally used. Ordinary booster pumps have low pressure and small flow rate. During peak hydrogen refueling periods when the demand for hydrogen is high, the waiting time is long and cannot meet the demand for large-flow hydrogen refueling.

[0004] Furthermore, when liquid hydrogen vaporization and hydrogen fuel cell systems are in operation, some components require a cold source while others require a heat source. If heat exchange could be achieved between these components, a significant amount of energy could be saved. Currently, there is no good solution to the above problem.

[0005] In summary, how to meet the high-flow hydrogen refueling demand of skid-mounted hydrogen refueling stations and fully utilize the heat exchange of various components has become a pressing technical challenge that needs to be addressed in the industry. Utility model content:

[0006] To overcome the shortcomings of existing technologies, this utility model provides a liquid hydrogen skid-mounted hydrogen refueling heat exchange system with a high-flow-rate plunger pump, which solves the problem that the previous booster pump could not meet the high-flow-rate hydrogen refueling demand during peak hydrogen refueling periods, and solves the problem of fully utilizing heat exchange between various components in the hydrogen refueling skid-mounted station.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0008] A high-flow-rate plunger pump-based liquid hydrogen skid-mounted hydrogen refueling and heat exchange system includes a liquid hydrogen storage tank. The bottom of the liquid hydrogen storage tank is filled with liquid hydrogen, and the top contains hydrogen flash vapor. The bottom of the liquid hydrogen storage tank is connected to the inlet of the plunger pump's booster chamber via an inlet pipe. The exhaust port at the top of the plunger pump's booster chamber is connected to the liquid hydrogen storage tank via a return gas pipe. The return gas pipe inside the liquid hydrogen storage tank extends to the top. The plunger pump's outlet is connected to the inlet of a heat exchanger via a pipe. The outlet of the heat exchanger is connected to a hydrogen storage cylinder group via a pipe. The hydrogen storage cylinder group is connected to a hydrogen cooler via a pipe. The hydrogen cooler is then connected to a hydrogen refueling machine via a pipe. The heat exchanger is connected to a heat source generated by a hydrogen fuel cell for heat exchange. The hydrogen fuel cell is connected to a charging pile.

[0009] The hydrogen storage cylinder assembly is connected to the hydrogen fuel cell via pipelines and a pressure reducing valve.

[0010] The hydrogen cooler is connected to the heat exchanger for heat exchange.

[0011] The heat source generated by the hydrogen fuel cell is connected to the heating components.

[0012] The hydrogen fuel cell is also connected to a lithium battery.

[0013] The present invention adopts the above solution and has the following advantages:

[0014] By employing a plunger pump, the system offers advantages such as high pressure and large flow rate, enabling rapid hydrogen refueling. Even during peak refueling periods, it can meet the demand for high-flow-rate hydrogen refueling. Liquid hydrogen from the liquid hydrogen storage tank enters the pressurization chamber of the plunger pump through the inlet pipe. In the pressurization chamber, the liquid hydrogen is pressurized, and some of it vaporizes. The resulting hydrogen gas is then stored at the top of the liquid hydrogen storage tank via the return gas pipe. The plunger pump pumps the liquid hydrogen into a heat exchanger for vaporization before supplying it to the hydrogen storage cylinder group. The storage cylinder group then supplies the hydrogen gas to the hydrogen dispenser, achieving rapid hydrogen refueling. Furthermore, the heat exchanger and hydrogen fuel cell can exchange heat, and the heat exchanger and hydrogen cooler can also exchange heat. Thus, this invention integrates charging and rapid hydrogen refueling functions in the hydrogen refueling skid station, making full use of the skid station space. Moreover, the hydrogen fuel cell, heat exchanger, and hydrogen cooler components can exchange heat effectively, saving a significant amount of energy. Attached image description:

[0015] Figure 1 This is a schematic diagram of the structural principle of this utility model.

[0016] In the diagram, 1 is a liquid hydrogen storage tank, 2 is an inlet pipe, 3 is a plunger pump, 4 is a return gas pipe, 5 is a heat exchanger, 6 is a hydrogen storage cylinder group, 7 is a hydrogen cooler, 8 is a hydrogen refueling machine, 9 is a hydrogen fuel cell, 10 is a charging pile, 11 is a pressure reducing valve, 12 is a heating component, and 13 is a lithium battery. Detailed implementation method:

[0017] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0018] like Figure 1As shown, a high-flow-rate plunger pump-based liquid hydrogen skid-mounted hydrogenation heat exchange system includes a liquid hydrogen storage tank 1. The bottom of the liquid hydrogen storage tank 1 is filled with liquid hydrogen, and the top is filled with hydrogen flash vapor. The bottom of the liquid hydrogen storage tank 1 is connected to the inlet of the pressurization chamber of the plunger pump 3 via an inlet pipe 2. The exhaust port at the top of the pressurization chamber of the plunger pump 3 is connected to the liquid hydrogen storage tank 1 via a return gas pipe 4. The return gas pipe inside the liquid hydrogen storage tank 1 extends to the top. The discharge port of the plunger pump 3 is connected to a heat exchanger 5 via a pipe. The inlet of the heat exchanger 5 is connected to the outlet of the hydrogen storage cylinder group 6 via a pipeline. The hydrogen storage cylinder group 6 is connected to the hydrogen cooler 7 via a pipeline. The hydrogen cooler 7 is then connected to the hydrogen refueling machine 8 via a pipeline. The hydrogen cooler 7 can cool the hydrogen discharged from the hydrogen storage cylinder group 6, thereby controlling the temperature of the hydrogen entering the hydrogen refueling machine 8. The heat exchanger 5 is connected to the heat source generated by the hydrogen fuel cell 9 for heat exchange. The hydrogen fuel cell 9 is connected to the charging pile 10.

[0019] The hydrogen storage cylinder group 6 is connected to the hydrogen fuel cell 9 via a pipeline and a pressure reducing valve 11. The high-pressure hydrogen in the hydrogen storage cylinder group 6 is reduced in pressure by the pressure reducing valve 11 and can then be supplied to the hydrogen fuel cell 9 for use.

[0020] The hydrogen cooler 7 is connected to the heat exchanger 5 for heat exchange.

[0021] The heat source generated by the hydrogen fuel cell 9 is connected to the heating component 12, which can provide heating for the areas in need.

[0022] The hydrogen fuel cell 9 is also connected to a lithium battery 13, which can charge the lithium battery 13 and provide electrical energy for the operation of the hydrogen fuel cell 9.

[0023] Working principle:

[0024] Liquid hydrogen from the bottom of liquid hydrogen storage tank 1 enters the pressurization chamber of plunger pump 3 through inlet pipe 2. During pressurization, some of the liquid hydrogen vaporizes, and the resulting hydrogen gas enters the top of liquid hydrogen storage tank 1 through return pipe 4 for storage, thus avoiding interference with the normal operation of plunger pump 3. Plunger pump 3 then pumps the liquid hydrogen into heat exchanger 5 for further vaporization. The vaporized hydrogen gas then enters hydrogen storage cylinder group 6 for storage. The high-pressure hydrogen gas in hydrogen storage cylinder group 6 first enters hydrogen cooler 7 for cooling before entering hydrogen refueling machine 8, achieving rapid hydrogen refueling. The high-pressure hydrogen in the hydrogen storage tank group 6 is depressurized by the pressure reducing valve 11 and can be used by the hydrogen fuel cell 9. The electrical energy generated by the hydrogen fuel cell 9 when it is working can be supplied to the charging pile 10 to realize the charging function of the electric vehicle. The heat source generated by the hydrogen fuel cell 9 when it is working can exchange heat with the heat exchanger 5 to cool the hydrogen fuel cell 9. The heat exchanger 5 makes full use of the heat source of the hydrogen fuel cell 9 to vaporize the liquid hydrogen. The cold source generated by the heat exchanger 5 can also be supplied to the hydrogen cooler 7. The heat exchange between the components can save a lot of energy.

[0025] The above-described specific embodiments should not be construed as limiting the scope of protection of this utility model. Any alternative improvements or modifications made to the embodiments of this utility model by those skilled in the art shall fall within the scope of protection of this utility model.

[0026] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A liquid hydrogen prying heat exchange system of a large flow plunger pump, characterized in that: The system includes a liquid hydrogen storage tank, with liquid hydrogen at the bottom and hydrogen flash vapor at the top. The bottom of the liquid hydrogen storage tank is connected to the inlet of the pressurization chamber of a plunger pump via an inlet pipe. The exhaust port at the top of the pressurization chamber of the plunger pump is connected to the liquid hydrogen storage tank via a return gas pipe. The return gas pipe inside the liquid hydrogen storage tank extends to the top. The outlet of the plunger pump is connected to the inlet of a heat exchanger via a pipe. The outlet of the heat exchanger is connected to a hydrogen storage cylinder group via a pipe. The hydrogen storage cylinder group is connected to a hydrogen cooler via a pipe. The hydrogen cooler is then connected to a hydrogen refueling machine via a pipe. The heat exchanger is connected to a heat source generated by a hydrogen fuel cell for heat exchange. The hydrogen fuel cell is connected to a charging pile.

2. The liquid hydrogen skid-mounted hydrogen heat exchange system of a large-flow plunger pump according to claim 1, characterized in that: The hydrogen storage cylinder assembly is connected to the hydrogen fuel cell via pipelines and a pressure reducing valve.

3. The liquid hydrogen skid-mounted hydrogen heat exchange system of a large flow plunger pump according to claim 1, characterized in that: The hydrogen cooler is connected to the heat exchanger for heat exchange.

4. The liquid hydrogen skid-mounted hydrogen heat exchange system of a large flow plunger pump according to claim 1, characterized in that: The heat source generated by the hydrogen fuel cell is connected to the heating components.

5. The liquid hydrogen skid-mounted hydrogen heat exchange system of a large flow plunger pump according to claim 1, characterized in that: The hydrogen fuel cell is also connected to a lithium battery.

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