JPS60173358A - Hydrogen feeder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention comprises a pump having an inlet and an outlet, the inlet [1] communicating with liquid hydrogen in a cryogenic tank, and a hydrogen engine connected to the outlet. The supply pipe leading to is connected,
The present invention relates to a hydrogen supply device for a hydrogen engine.

[Conventional technology and problems]

In the case of hydrogen engines, especially hydrogen engines that form a mixture internally, i.e., hydrogen supply devices that store liquid hydrogen at an ultra-low temperature for engines such as diesel engines where hydrogen is injected at high pressure at top dead center, the pump is at an ultra-low temperature. It is known that high-pressure liquid hydrogen pumps are arranged in tanks, which pumps are kept cooled to operating temperatures in the boiling range of hydrogen. This makes it possible to start the liquid hydrogen high pressure pump even after a long rest period and supply high pressure (30 to 100 bar or more) hydrogen to the hydrogen engine.

A disadvantage of this configuration is that in order to integrate the liquid hydrogen high pressure pump into the cryogenic tank, a large opening must be provided in the tank, which significantly impairs the insulation properties of the tank. It also creates an extra thermal short circuit or connecting pipe that reaches the inside of the cryogenic tank, which is necessary to operate the liquid hydrogen high-pressure pump.

Therefore, the generally high evaporation rates of the cryogenic tanks of automotive hydrogen engines, which are small in nature, are even significantly higher, unless special construction costs are invested. Furthermore, when built into an ultra-low temperature tank, it is almost impossible to access the high-pressure liquid hydrogen tank, making it extremely difficult to adjust the tank while it is in operation. Must be removed from the tank.

The purpose of the present invention is to have a relatively low vaporization rate in a cryogenic tank;
The object of the present invention is to improve the hydrogen supply device mentioned at the beginning so that the liquid hydrogen high-pressure pump can be easily accessed.

[Means and effects for solving the problem] In the present invention, in the hydrogen supply device as described at the beginning, the pump is housed in a cryogenic container separate from the cryogenic tank, and the pump is stored in a cryogenic container separate from the cryogenic tank. This is achieved by introducing low-temperature gaseous hydrogen into the ultra-low temperature container and providing a cooling pipe to cool the pump.

If you configure the ultra-low temperature tank and pump in this way, it will be a no-brainer!
An ultra-low temperature tank with extremely excellent properties is obtained.

The evaporation rate of the cryogenic tank is extremely low, since thermal short circuits formed by the connections to the pump can be avoided. With the configuration of the present invention, the low temperature hydrogen gas generated despite such a low vaporization rate can be used to cool the pump in the cryogenic container, especially when the vehicle is stopped. Furthermore, access to the pump for maintenance and adjustment is significantly easier.

A preferred embodiment of the invention includes a suction pipe opening into the cryogenic vessel for drawing gaseous hydrogen from the cryogenic vessel;
It is advantageous to provide an auxiliary gas pump equipped with a discharge pipe, and this configuration difference can be achieved by increasing the cooling efficiency by increasing the flow rate of the low-temperature hydrogen gas in the cryogenic container-2, and by switching the pump as necessary. Can be rapidly cooled.

Preferably, the discharge pipe of the auxiliary gas pump opens into a suction pipe leading from the pump to the cryogenic tank.

This allows the hydrogen to flow back into the cryogenic tank after passing through the cryogenic container, resulting in a closed cooling circuit and eliminating hydrogen loss. Further, hydrogen gas whose temperature rises in the cryogenic container and returns to the cryogenic tank through the suction pipe immersed in liquid hydrogen is cooled again as it passes through the liquid hydrogen. Another advantage of using a suction pipe for hydrogen gas reflux is that the number of pipes leading to the cryogenic tank forming a thermal short circuit can be minimized.

As an embodiment of the present invention, it is preferable to provide a first flow control means in the cooling pipe between the cryogenic tank and the cryogenic container.

This makes it possible, for example, to interrupt the cooling of the pump with gaseous hydrogen when the pump supplies liquid hydrogen and is therefore directly cooled by the liquid hydrogen passing through the pump, or when it is desired to raise the temperature of the pump.

It is preferable to provide a second flow control means in the suction pipe of the pump. This makes it possible to close the cryogenic tank together with the first flow restriction means, for example, while the vehicle is stopped.

In another embodiment of the present invention, a one-way flow path is provided between the first flow control means and the cryogenic container, which branches from the cooling pipe and is equipped with a check valve that allows only the gas flow from the cooling pipe to pass through. Another advantage of this one-way flow path is that in special cases the pump can also supply gaseous hydrogen from the cryogenic tank; Prevents the cryogenic vessel cooling circuit from shorting by reaching the cooling pipes.

A special embodiment of the invention is characterized in that a control device is provided which operates the auxiliary gas pump at the same time as opening the first flow restriction means and the second flow restriction means in order to cool the pump.

〔Example〕

Other features and advantages of the present invention will be described below with reference to embodiments shown in the accompanying drawings.

The illustrated apparatus comprises a cryogenic tank 10 partially filled with liquid hydrogen 12. The suction pipe 14 immersed in liquid hydrogen 12 in the cryogenic tank 10 reaches the inlet of the liquid hydrogen high-pressure pump 16, and a side flow means 18 is provided between the cryogenic tank]O and the liquid hydrogen high-pressure pump 16. . A supply pipe 22 leading to a hydrogen engine 20 (only shown briefly) is provided at the discharge port of the liquid hydrogen high-pressure pump 16.
This supply pipe 22 is equipped with a check valve 24 that allows flow only toward the hydrogen engine 20. A side flow means 26 is provided between the check valve 24 and the hydrogen engine 20.

Between the check valve 24 and the side flow means 26, a one-way flow path 30, which is provided with a check valve 32 and leads to an intermediate storage means 28 for gaseous hydrogen, branches off. A one-way flow path 34 , further provided with a check valve 36 , leads from the intermediate storage means 28 to the supply pipe 22 , between the branching point of the one-way flow path 30 and the side flow means 26 .
Opens at 2.

In order to cool the liquid hydrogen high-pressure tank 16 disposed inside the ultra-low temperature container 38, a cooling pipe 4o leading from the ultra-low temperature tank 1o to the ultra-low temperature container 38 is connected to the gaseous hydrogen present on the -F side of the liquid hydrogen 12 in the ultra-low temperature tank 10. Extrude into compressed gas. The cooling pipe 40 also includes side flow means 4o for flow rate regulation. An auxiliary gas pump 44 having a suction helmet 46 and a discharge pipe 48 is provided, the suction pipe 46 is opened into the cryogenic container 38, and the discharge pipe 48 is connected to the suction pipe 14 between the side flow means 18 and the liquid hydrogen high pressure pump 1G. Open each.

A one-way flow path 5o provided with a check valve 32 is branched from the cooling pipe 4o between the side flow means 42 and the cryogenic container 38, and the one-way flow path 5o is branched from the cooling pipe 4o, and the one-way flow path 5o is branched from the cooling pipe 4o. A line 511 is opened to the suction pipe 14 between the connection point of the discharge pipe 48 and the liquid hydrogen high-pressure pump 16.

Side flow means 18 of the suction pipe 14, side flow means 2 of the supply pipe 22
6 and the side flow means 42 of the cooling pipe 40 can be operated in various ways. For example, side flow means 18.26.42
may also be implemented as an electrically operable magnetic valve.

The liquid hydrogen high pressure pump 16 and the auxiliary gas pump 44 can be provided with various driving means.

Preferably, the auxiliary gas pump 44 is equipped with an electric drive means and the liquid hydrogen high pressure pump 16 is equipped with a hydraulic drive means.

When the hydrogen engine 2o is stopped and the hydrogen supply device is not operating, the side flow means +8.42.26 is in a closed state.

The liquid hydrogen high pressure pump 16 housed in the cryogenic container 38 is not cooled and therefore its temperature increases.

At temperatures above the operating temperature corresponding to the boiling point region of liquid hydrogen, the liquid hydrogen high-pressure pump 16 will not operate properly 1 and therefore cannot supply the high-pressure hydrogen necessary to operate the hydrogen engine 2o, so the hydrogen engine 20 is started. It must be cooled to operating temperature before being used. For this reason, the cooling pipe 4
When the flow restricting means 42 of O and the side flow means 18 of the suction pipe 14 are opened, the auxiliary gas pump 44 is activated. The low-temperature hydrogen gas forming a compressed gas above the liquid hydrogen 12 in the ultra-low temperature tank 10 is sucked into the ultra-low temperature container 38 through the cooling pipe 40 and circulated through the liquid hydrogen high pressure pump 16.
"L, as a result, the liquid hydrogen high pressure pump 16 is cooled. As a result, the hydrogen gas whose temperature has increased is transferred to the auxiliary gas pump 44.
The liquid is sucked out from the cryogenic container 38 through the suction pipe 46 and forced into the suction pipe 14 through the discharge pipe 48 . The suction pipe 14 passes through the suction pipe 14 immersed in the liquid hydrogen 12 and returns to the ultra-low temperature tank 10. At this time, since it is sucked into the liquid hydrogen 12, it is cooled by the liquid hydrogen and compressed as a cooling medium again. Replenished in gas.

This cooling process includes at least the liquid hydrogen high pressure pump 16
reaches approximately its operating temperature, the necessary high-pressure hydrogen can be supplied to the hydrogen engine 20, and this continues until the hydrogen engine 2o can be started by supplying electricity and opening the side flow means 26. The intermediate storage means 28 then acts as a pressure equalization vessel, so that the necessary high pressure is built up before starting the hydrogen engine 20.

Furthermore, if the side flow means 26 of the supply pipe 22 is closed off at an appropriate timing before stopping the hydrogen engine 20, a check valve 22 can be installed between the intermediate storage means 28 and the liquid hydrogen high pressure pump 16.
4, hydrogen is maintained under high pressure in the intermediate storage means 28 during the shutdown period, and this high pressure
Hydrogen engine 20
The liquid hydrogen high pressure pump 16, which is at the operating temperature level, may be operated at or immediately after the start-up of the liquid hydrogen pump 16.

Since the one-way flow path 50 is provided, gaseous hydrogen can also be supplied together with the liquid hydrogen high-pressure pump 1G cooled to the operating temperature.
8 is closed, the cooling pipe 40 and the one-way flow path 50
Liquid hydrogen can be supplied to the high-pressure pump 16 through.

[Brief explanation of the drawing]

The figure is a configuration diagram schematically showing the hydrogen supply device of the present invention. IO cryogenic tank, 12-liquid hydrogen, 16 liquid hydrogen high-pressure pump, 18 second flow control means, 38-cryogenic container, 40 cooling pipe, 42-first flow control means, 44-auxiliary gas pump, 5
〇 One-way flow path, 52-check valve. Patent ApplicantToy 7thie Forschunges-Untfelshashuanstaltfuur Luftor Landraumfahrtny, Fau. Patent application agent Akira Aoki, Patent Attorney Nishidate, Japanese Patent Attorney Hyakumon, Kuniaki Patent Attorney, Akira Yamaguchi, Patent Attorney Masaya Nishiyama, ZH's engraving (no changes to the content) 1z14 48 44 46 Continued from page 1 ] Inventor Gottsfried Schudneider Eller 0 Inventor Billy Nierache Teukan 7000 Stuttgart, 7000 Stuttgart 168 Stuttgart, 7000 USSR 1. Lindupurstrasse (no street address) Procedural amendment (method) 1988 March 8th, 2016 Manabu Shiga, Commissioner of the Japan Patent Office 1, Indication of the case 1982 Patent No. 248289 2, Name of the invention Hydrogen supply device 3, Person making the amendment Relationship with the case Patent applicant Ni, 7 4. 4 persons other than the agent) 6. Subject of amendment (1) "Applicant's representative" field in the application (2) Power of attorney (3) Drawing Z Contents of amendment (1) (2) Attachment As per (311yJ side engraving (no change in content) 8, list of attached documents (1) 1 copy of application for correction (2) 1 copy each of power of attorney and translation (3) 1 copy of engraving drawings

Claims (1)

[Claims] 1. A pump having an inlet and a discharge port, the inlet communicating with liquid hydrogen in a cryogenic tank, and the discharge port connected to a supply pipe leading to a hydrogen engine. In the hydrogen supply device for the engine, the pump (1
6) in a cryogenic container (3B) separate from the cryogenic tank (10).
) and then transport it from the ultra-low temperature tank (10) to the ultra-low temperature container (3).
At the same time, low-temperature gaseous hydrogen is introduced into the pump (1).
6) A hydrogen supply device characterized by being provided with a cooling pipe (40) for cooling the hydrogen. 2. A suction pipe (46) that opens into the cryogenic container (38) to suck gaseous hydrogen from the cryogenic container (38)
and a discharge pipe (48).
) The hydrogen supply device according to claim 1, characterized in that the hydrogen supply device is provided with: 3. The discharge pipe (48) of the auxiliary gas pump (44) connects to the suction pipe (
14) Claim 2 characterized in that it opens to
Hydrogen supply device as described in Section. 4. Claims 1 to 3, characterized in that a first flow control means (42) is provided in the cooling pipe (40) between the ultra-low temperature tank (10) and the ultra-low temperature container (38). The hydrogen supply device according to any of the above. 5. The hydrogen supply device according to any one of claims 1 to 4, characterized in that the suction pipe (14) of the pump (16) is provided with a second flow control means (18). . 6. A check valve (52) is provided that branches from the cooling pipe (40) between the first flow control means (42) and the ultra-low temperature container (38) and allows only the gas flow from the cooling pipe (40) to pass through. Claim 4 or 5, characterized in that the unidirectional flow path (50) opens into the suction pipe (14) of the pump (16).
Hydrogen supply device as described in Section. 7. First flow control means (to cool the pump (J6)
42) and a control device that operates the auxiliary gas pump (44) at the same time as opening the second flow restriction means (18).
The hydrogen supply device according to claim 4, 5, or 6, characterized in that: