A liquid hydrogen tank self-pressurized hydrogen gas power generation system

Abstract

This utility model relates to the field of liquid hydrogen storage technology, and more particularly to a liquid hydrogen tank self-pressurization and hydrogen vaporization power generation system. It 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 a self-pressurizing unit via a self-pressurizing pipeline. The outlet of the self-pressurizing unit is then connected to the top of the liquid hydrogen storage tank via a gas pipeline. The top of the liquid hydrogen storage tank is then connected to the inlet of a vaporizer via a branch pipeline. The outlet of the vaporizer is connected to a hydrogen storage cylinder group via a pipeline. The hydrogen storage cylinder group is then connected to a hydrogen fuel cell via a pipeline. The hydrogen fuel cell is connected to a charging pile, realizing the charging function. The liquid hydrogen at the bottom of the liquid hydrogen storage tank flows into the self-pressurizing unit under its own gravity for vaporization. The vaporized hydrogen then replenishes the top of the liquid hydrogen storage tank, increasing the pressure of the hydrogen flash vapor at the top of the tank. This eliminates the need for a separate booster pump, saving energy consumption.

Description

Technical fields:

[0001] This utility model relates to the field of liquid hydrogen storage technology, and in particular to a liquid hydrogen tank self-pressurization and hydrogen gasification power generation system. 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, during the actual hydrogen storage process, some liquid hydrogen will vaporize, generating hydrogen flash vapor at the top of the liquid hydrogen storage tank. This part of the gas is not fully utilized in the liquid hydrogen storage tank, resulting in waste. Moreover, since the pressure of the hydrogen flash vapor in the liquid hydrogen storage tank is not high, if these gases are to be utilized, a booster pump needs to be installed to pressurize the gas before it is transported out, which increases the additional power consumption.

[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 rationally utilize hydrogen flash vapor in liquid hydrogen storage tanks has become a pressing technical challenge that needs to be addressed in the industry. Utility Model Content:

[0006] To overcome the shortcomings of the prior art, this utility model provides a liquid hydrogen tank self-pressurization hydrogen vaporization power generation system, which solves the problem that hydrogen flash vapor in liquid hydrogen storage tanks was not properly utilized and also solves the problem that a separate booster pump was needed to pressurize the hydrogen flash vapor.

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

[0008] A liquid hydrogen tank self-pressurization hydrogen vaporization power generation system includes a liquid hydrogen storage tank. The bottom of the liquid hydrogen storage tank is filled with liquid hydrogen, and the top is filled with hydrogen flash vapor. The bottom of the liquid hydrogen storage tank is connected to the liquid inlet of a self-pressurizing device via a self-pressurizing pipeline. The outlet of the self-pressurizing device is then connected to the top of the liquid hydrogen storage tank via a gas pipeline. The top of the liquid hydrogen storage tank is then connected to the inlet of a vaporizer via a branch pipeline. The outlet of the vaporizer is connected to a hydrogen storage cylinder group via a pipeline. The hydrogen storage cylinder group is then connected to a hydrogen fuel cell via a pipeline. The hydrogen fuel cell is connected to a charging pile.

[0009] The top of the liquid hydrogen storage tank is connected to the inlet of a heat exchanger via another branch of the pipeline. The outlet of the heat exchanger is connected to the hydrogen storage cylinder group. The heat exchanger is connected to the heat source generated by the hydrogen fuel cell for heat exchange.

[0010] A one-way valve is installed on the pipeline connected to the top rear side of the liquid hydrogen storage tank.

[0011] The self-pressurizer is an air bath vaporizer.

[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 installing a self-pressurizing device between the bottom and top of the liquid hydrogen storage tank, the liquid hydrogen at the bottom of the tank can flow into the self-pressurizing device under its own gravity through the self-pressurizing pipeline for vaporization. The vaporized hydrogen is then replenished to the top of the liquid hydrogen storage tank, increasing the hydrogen flash vapor pressure at the top of the tank. This eliminates the need for a separate booster pump, saving energy consumption. After opening the pipeline valve, one branch of this hydrogen flash vapor can automatically enter the vaporizer for re-vaporization through a one-way valve, and then enter the hydrogen storage cylinder group, which then supplies hydrogen to... The hydrogen fuel cell generates electricity that can be supplied to charging stations to charge electric vehicles. Another branch of the hydrogen flash vapor can pass through a one-way valve into a heat exchanger, which is connected to the heat source generated by the hydrogen fuel cell for heat exchange, re-vaporizing the hydrogen flash vapor before it enters the hydrogen storage tank assembly. In this way, the hydrogen refueling skid-mounted station of this invention achieves charging functionality, making full use of the space in the refueling skid-mounted station. Furthermore, the hydrogen fuel cell and the heat exchanger can fully exchange heat, saving 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 a self-pressurizing pipeline, 3 is a self-pressurizer, 4 is a gas pipeline, 5 is a vaporizer, 6 is a hydrogen storage cylinder group, 7 is a hydrogen fuel cell, 8 is a charging pile, 9 is a heat exchanger, 10 is a one-way valve, and 11 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 liquid hydrogen tank self-pressurization hydrogen vaporization power generation 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 hydrogen flash vapor. The bottom of the liquid hydrogen storage tank 1 is connected to the liquid inlet of a self-pressurizing device 3 through a self-pressurizing pipeline 2. The outlet of the self-pressurizing device 3 is then connected to the top of the liquid hydrogen storage tank 1 through a gas pipeline 4. The top of the liquid hydrogen storage tank 1 is then connected to the inlet of a vaporizer 5 through a branch pipeline. The outlet of the vaporizer 5 is connected to a hydrogen storage cylinder group 6 through a pipeline. The hydrogen storage cylinder group 6 is then connected to a hydrogen fuel cell 7 through a pipeline. The hydrogen fuel cell 7 is connected to a charging pile 8.

[0019] The top of the liquid hydrogen storage tank 1 is connected to the inlet of the heat exchanger 9 via another branch of the pipeline. The outlet of the heat exchanger 9 is connected to the hydrogen storage cylinder group 6. The heat exchanger 9 is connected to the heat source generated by the hydrogen fuel cell 7 for heat exchange.

[0020] A one-way valve 10 is installed on the pipeline connected to the top rear side of the liquid hydrogen storage tank 1 to prevent hydrogen flash vapor backflow.

[0021] The self-pressurizer 3 uses an air bath vaporizer, which automatically heats the liquid hydrogen by utilizing the flow of air, without requiring additional energy consumption.

[0022] The hydrogen fuel cell 7 is also connected to a lithium battery 11, which can charge the lithium battery 11 and provide electrical energy for the operation of the hydrogen fuel cell 7.

[0023] Working principle:

[0024] Liquid hydrogen at the bottom of liquid hydrogen storage tank 1, under its own gravity, flows through self-pressurizing pipeline 2 into self-pressurizer 3 for vaporization. The vaporized hydrogen then flows through gas pipeline 4 to replenish the top of liquid hydrogen storage tank 1, increasing the hydrogen flash vapor pressure at the top of liquid hydrogen storage tank 1. This eliminates the need for a separate booster pump, saving energy. After opening the pipeline valves, one branch of this hydrogen flash vapor can automatically enter vaporizer 5 through one-way valve 10 for re-vaporization, and then enter hydrogen storage cylinder group 6. Another branch of the hydrogen flash vapor can enter heat exchanger 9 through one-way valve 10. Heat exchanger 9 is connected to the heat source generated by hydrogen fuel cell 7 for heat exchange, re-vaporizing the hydrogen flash vapor, and then entering hydrogen storage tank group 6. Hydrogen storage tank group 6 then supplies hydrogen to hydrogen fuel cell 7. The electrical energy generated by hydrogen fuel cell 7 when it is working can be supplied to charging pile 8 to realize the charging function of electric vehicle. The heat source generated by hydrogen fuel cell 7 when it is working can exchange heat with heat exchanger 9 to cool hydrogen fuel cell 7. Heat exchanger 9 makes full use of the heat source of hydrogen fuel cell 7 to fully vaporize hydrogen flash vapor, saving energy.

[0025] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model 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 tank self-pressurization hydrogen vaporization power generation system, 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 a self-pressurizing device via a self-pressurizing pipeline. The outlet of the self-pressurizing device is then connected to the top of the liquid hydrogen storage tank via a gas pipeline. The top of the liquid hydrogen storage tank is then connected to the inlet of a vaporizer via a branch pipeline. The outlet of the vaporizer is connected to a hydrogen storage cylinder assembly via a pipeline. The hydrogen storage cylinder assembly is then connected to a hydrogen fuel cell via a pipeline. The hydrogen fuel cell is connected to a charging station.

2. The liquid hydrogen tank self-pressurization hydrogen vaporization power generation system according to claim 1, characterized in that: The top of the liquid hydrogen storage tank is connected to the inlet of a heat exchanger via another branch of the pipeline. The outlet of the heat exchanger is connected to the hydrogen storage cylinder group. The heat exchanger is connected to the heat source generated by the hydrogen fuel cell for heat exchange.

3. The liquid hydrogen tank self-pressurization hydrogen vaporization power generation system according to claim 1, characterized in that: A one-way valve is installed on the pipeline connected to the top rear side of the liquid hydrogen storage tank.

4. The liquid hydrogen tank self-pressurization hydrogen vaporization power generation system according to claim 1, characterized in that: The self-pressurizer is an air bath vaporizer.

5. A liquid hydrogen tank self-pressurization hydrogen vaporization power generation system according to claim 1, characterized in that: The hydrogen fuel cell is also connected to a lithium battery.

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