JPWO2018173136A1 - Hydrogen gas supply apparatus and method - Google Patents

Abstract

In a so-called hydrogen station, cryogenic liquefied hydrogen is directly changed to hydrogen gas having a predetermined target temperature and supplied. In a hydrogen gas supply device that supplies liquefied hydrogen LH2 in a liquefied hydrogen storage tank to hydrogen gas GH2 having a predetermined temperature and supplies the dispenser to the dispenser, a liquefied hydrogen pump that pumps the liquefied hydrogen while increasing the pressure, and a hydrogen gas having a predetermined temperature from the fed liquefied hydrogen. A gasifying device is provided. The gasifier includes a refrigerant tank having a liquid phase part and a gas phase part in which a liquid refrigerant R having a boiling point at a specific pressure and a temperature at which the temperature of hydrogen gas is raised to the above-described predetermined temperature. A temperature rising heat exchange path passing through the inside and pressure adjusting means for adjusting the pressure of the refrigerant in the refrigerant tank to the above-mentioned specific pressure are provided.

Description

  The present invention relates to a hydrogen gas supply device installed in a hydrogen station for filling a hydrogen gas tank such as a fuel cell vehicle (FCV) with hydrogen gas.

  A hydrogen gas tank of a fuel cell vehicle is filled with hydrogen gas at a high pressure.

  However, a temperature rise occurs due to adiabatic compression when filling with hydrogen gas. In the first place, unlike general gases, hydrogen gas has the property that the temperature rises due to the Joule-Thompson effect when adiabatic expansion occurs.

  A hydrogen gas tank filled with hydrogen gas having such a property is formed of reinforced plastic (FRP) for weight reduction, and the upper limit of the use temperature is set to 85 ° C. in consideration of durability.

  For this reason, it is necessary to control the temperature of the hydrogen gas to be filled to prevent an excessive increase in the gas temperature in the hydrogen gas tank during filling. It is called precooling to keep hydrogen gas at a low temperature prior to filling. −40 ° C. to −33 ° C. is the precooling temperature range defined by the compressed hydrogen filling technical standard (JPEC-S0003 (2012)).

  Such a pre-cooling was necessary not only when supplying hydrogen gas from a storage tank storing high-pressure hydrogen gas, but also when supplying hydrogen gas at a hydrogen station having a low-pressure liquefied hydrogen storage tank.

  For example, a hydrogen gas filling apparatus for fuel disclosed in Patent Document 1 below pressurizes and pumps liquefied hydrogen derived from a liquefied hydrogen storage tank with a booster pump, and normal temperature hydrogen gas higher than a predetermined target temperature with a heat exchanger A hydrogen supply line and a bypass line through which low-temperature hydrogen gas flows, and normal-temperature hydrogen gas and low-temperature hydrogen gas are mixed by opening / closing control of the flow control valve, so that the gas temperature of the mixed gas becomes the target predetermined temperature. It is trying to become. The flow rate is adjusted based on the measured temperature of the necessary part.

  However, since the temperature is adjusted by changing the flow rate of the hydrogen gas based on the temperature, variations tend to occur and it is difficult to stabilize the temperature.

JP 2012-167767 A

  In view of this, the main object of the present invention is to make it possible to supply low-temperature liquefied hydrogen by directly changing it to hydrogen gas having a predetermined target temperature (cooling temperature).

  Means therefor is a hydrogen gas supply device that supplies liquefied hydrogen in a liquefied hydrogen storage tank to hydrogen gas at a predetermined temperature and supplies the dispenser to the dispenser, wherein the liquefied hydrogen pump sends out the liquefied hydrogen in the liquefied hydrogen storage tank while increasing the pressure, and A gasifier that generates hydrogen gas at a predetermined temperature from liquefied hydrogen sent out by a liquefied hydrogen pump, wherein the gasifier has a boiling point at a specific pressure at a temperature at which the hydrogen gas is raised to the predetermined temperature; A refrigerant tank in which a liquid refrigerant is sealed and having a liquid phase part and a gas phase part, a temperature rising heat exchange path passing through the refrigerant tank, and a pressure of the refrigerant in the refrigerant tank are adjusted to the specific pressure. This is a hydrogen gas supply device having pressure adjusting means.

  In this configuration, the liquefied hydrogen pump pressurizes and sends out the liquefied hydrogen in the liquefied hydrogen storage tank as a liquid, and the gasifier into which the liquefied hydrogen is introduced turns the liquefied hydrogen into hydrogen gas. The refrigerant in the refrigerant tank of the gasifier is adjusted by the pressure adjusting means to a specific pressure whose boiling point is the temperature at which the hydrogen gas is heated to a predetermined temperature. The pressure adjustment by the pressure adjusting means may be performed by adjusting the vaporization amount of the refrigerant. Adjustment of the vaporization amount of the refrigerant is performed automatically using the pressure adjustment valve, and when the pressure or temperature is lower than the value corresponding to the specific pressure based on the measured value of the pressure gauge or thermometer, The valve can be opened and closed so that the amount of vaporization is increased by increasing the opening, and the amount of vaporization is decreased by decreasing the opening when the opening is high. Due to this pressure adjustment, the temperature of the refrigerant becomes constant due to the latent heat change when the refrigerant is vaporized, and the liquefied hydrogen passing through the temperature rising heat exchange path becomes hydrogen gas of a predetermined temperature and is supplied to the dispenser.

  According to the present invention, since low-temperature liquefied hydrogen can be directly changed to hydrogen gas having a predetermined target temperature and supplied, it is very efficient.

Explanatory drawing of hydrogen gas supply equipment. Explanatory drawing of the hydrogen gas supply equipment which concerns on another example. Explanatory drawing of the hydrogen gas supply equipment which concerns on another example. Explanatory drawing of the hydrogen gas supply equipment which concerns on another example. Explanatory drawing of the refrigerant tank which concerns on another example.

An embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory diagram of a so-called hydrogen station that supplies hydrogen gas (GH ₂ ) to a hydrogen gas filling facility 11 using a hydrogen gas supply device, specifically, mainly to a fuel cell vehicle X.

The hydrogen gas filling equipment 11 supplies liquefied hydrogen in a liquefied hydrogen storage tank 12 for storing liquefied hydrogen (LH ₂ ) to a dispenser 13 as hydrogen gas at a predetermined temperature. More simply, it is an apparatus that supplies hydrogen gas at a predetermined temperature simply by raising the temperature without cooling.

  As a configuration for this purpose, the hydrogen gas filling equipment 11 generates a hydrogen gas having a predetermined temperature from the liquefied hydrogen pump 14 that sends out the liquefied hydrogen in the liquefied hydrogen storage tank 12 while increasing the pressure, and the liquefied hydrogen sent out by the liquefied hydrogen pump 14. A gasifier 15 is provided. A path connected to the dispenser 13 through the gasifier 15 is a temperature raising flow path A.

  The hydrogen gas filling equipment 11 in the example shown in FIG. 1 is provided with a pressure accumulation channel B branched from the temperature rising channel A. This is because the hydrogen gas can be stored when the filling interval is long without the hydrogen filling being continuously performed at short intervals.

  The accumulator B is, in order from the branch point C of the temperature raising channel A, a high-pressure gas evaporator 16 that vaporizes liquefied hydrogen to form high-pressure hydrogen gas, and an accumulator 17 that accumulates hydrogen gas at normal temperature at high pressure. It has.

  The precooling flow path D is ahead of the pressure accumulator 17 and is connected to the dispenser 13. The precool channel D is a path for cooling the normal temperature hydrogen gas sent out from the pressure accumulator 17 to the predetermined temperature.

  In order to switch whether the liquefied hydrogen flows through the temperature rising channel A or the pressure accumulating channel B, between the branch point C and the gasifier 15 and between the branch point C and the gas feed evaporator 16. , Switching on / off valves 18 and 19 are provided, respectively.

  The gasifier 15 will be described. The gasifier 15 includes a liquid phase portion Ra and a gas phase portion Rb in which a liquid refrigerant R having a boiling point at a specific pressure is a temperature at which hydrogen gas is heated to a predetermined temperature. A refrigerant tank 21, a temperature rising heat exchange path 22 passing through the refrigerant tank 21, and a pressure adjusting means 23 for adjusting the pressure of the refrigerant R in the refrigerant tank 21 to a specific pressure. In other words, the boiling point of the refrigerant R at a specific pressure is a temperature suitable for a predetermined temperature that is a target temperature for raising the hydrogen gas, that is, a temperature that is the same as or close to the predetermined temperature.

Since the predetermined temperature for supplying hydrogen gas, that is, the target temperature is about −40 ° C. to −33 ° C., for example, carbon dioxide (CO ₂ ) is used as the refrigerant R sealed in the refrigerant tank 21. Carbon dioxide has a boiling point of −40 ° C. at 0.9 MPa.

  In the refrigerant tank 21, the refrigerant R is sealed at the above-described specific pressure, so that a liquid phase portion Ra of the refrigerant R is formed in the lower part of the refrigerant tank 21 and a gas phase part Rb of the refrigerant R is formed in the upper part. This refrigerant tank 21 has two chambers of a temperature rising tank 21a and a cooling tank 21b that are communicated with each other, and the temperature rising heat exchange path 22 that is a part of the temperature rising path A is provided in one temperature rising tank 21a. And a part of the temperature rising heat exchange path 22 is a temperature rising heat exchanging part 22a. The other cooling tank 21b has a cooling path 24 that is a part of the precooling flow path D described above, and a part of the cooling path 24 is a cooling heat exchanging portion 24a. Between the pressure accumulator 17 and the refrigerant tank 21 in the precool channel D, a gas supply opening / closing valve 25 is provided.

  The pressure adjusting means 23 includes a vaporizer 23a and a pressure regulator 23b. Specifically, a pressure regulation passage 23c that connects the upper and lower parts of the refrigerant tank 21 outside the refrigerant tank 21 is provided, and a vaporizer 23a and a pressure regulator 23b are provided on the pressure regulation path 23c. The vaporizer 23 a vaporizes the refrigerant R passing through it by heat exchange and sends it into the refrigerant tank 21 to increase the pressure of the refrigerant R in the refrigerant tank 21. The pressure regulator 23b is composed of a known pressure regulating valve such as a diaphragm valve, for example, and adjusts the opening according to the pressure in the refrigerant tank 21, and allows the refrigerant R to pass when the specific pressure is not reached. If the pressure in the refrigerant tank 21 increases, the temperature increases as the boiling point of the refrigerant R increases, and if the pressure decreases, the boiling point of the refrigerant R decreases and the temperature also decreases.

  A safety valve 26 is provided above the refrigerant tank 21. The safety valve 26 has a function of releasing the refrigerant R when the internal pressure rises excessively.

  Members required for drive control such as the liquefied hydrogen pump 14, the switching on-off valves 18 and 19, the pressure adjusting means 23, and the gas supply on-off valve 25 are driven and controlled by a control unit (not shown). Under the control of the control unit, the pressure of liquefied hydrogen is increased and sent to the gasifier 15, and the temperature of the refrigerant R is adjusted to a specific pressure in the gasifier 15 to increase the temperature through the liquefied hydrogen and reach a predetermined temperature. A temperature rising supply for generating hydrogen gas and supplying the generated hydrogen gas to the dispenser 13, and increasing the pressure of liquefied hydrogen and sending it to the gas evaporator 16, storing the hydrogen gas in the pressure accumulator 17, The precool supply is selectively performed in which the high-pressure hydrogen gas at normal temperature is passed through the refrigerant tank 21 of the gasifier 15 and precooled to a predetermined temperature to be supplied to the dispenser 13.

  In the hydrogen gas filling facility 11 having the above-described configuration, hydrogen gas is filled as follows.

  First, for the refrigerant R in the refrigerant tank 21 of the gasifier 15, the pressure adjusting means 23 automatically controls the pressure of the refrigerant R to be constant. Since carbon dioxide as the refrigerant R has a boiling point of −40 ° C. when the pressure is 0.9 MPa, the pressure adjusting means 23 adjusts the pressure of the refrigerant R in the refrigerant tank 21 to 0.9 MPa. The pressure adjustment is performed by controlling the amount of the refrigerant R sent into the refrigerant tank 21 through the vaporizer 23 a by the pressure regulator 23 b by adjusting the opening degree based on the pressure in the refrigerant tank 21. If the opening degree of the pressure regulator 23b is increased, the pressure in the refrigerant tank 21 increases and the temperature of the refrigerant R rises. Conversely, if the pressure regulator 23b is closed, the pressure in the refrigerant tank 21 decreases and the refrigerant is reduced. The temperature of R decreases.

  Specifically, when the pressure of the refrigerant R is higher than the adjustment value of 0.9 MPa, the pressure regulator 23b is closed and the amount of the refrigerant R entering the refrigerant tank 21 through the vaporizer 23a is reduced. To reduce the pressure. Conversely, when the pressure of the refrigerant R is lower than the adjustment value, the pressure regulator 23b increases the opening based on the pressure difference from the adjustment value, and enters the refrigerant tank 21 through the vaporizer 23a. Increase the amount of R to increase the pressure. By such pressure regulation, the temperature of the refrigerant R is kept at the boiling point temperature where the latent heat changes. In other words, the temperature of the refrigerant R is kept constant at −40 ° C., which is the boiling point of carbon dioxide, using latent heat without temperature change.

  Accordingly, the liquefied hydrogen or hydrogen gas passing through the temperature rising heat exchange path 22 in the temperature rising tank 21a of the refrigerant tank 21 by driving the liquefied hydrogen pump 14 rises to about −40 ° C. and passes through the temperature rising path A. Are supplied to the dispenser 13 and filled in the hydrogen gas tank Xa of the fuel cell vehicle X. Since the temperature of the refrigerant R is −40 ° C., depending on conditions such as the flow rate of hydrogen gas, the temperature of the hydrogen gas in the hydrogen gas tank Xa during filling is within a predetermined range of −40 ° C. to −33 ° C. Can be.

  The refrigerant R takes away the cold heat of the liquefied hydrogen passing through the temperature rising heat exchange path 22 and causes a temperature change. However, since the pressure adjusting means 23 keeps the pressure in the refrigerant tank 21 constant, the gasification and temperature rising of the liquefied hydrogen are constant. Is made.

  On the other hand, when the gas supply on / off valve 25 of the precool channel D is opened to supply the hydrogen gas stored in the pressure accumulator 17 through the pressure accumulation channel B from the dispenser 13, the hydrogen gas at high pressure and room temperature is accumulated. It exits from the vessel 17, passes through the precooling flow path D, and flows through the cooling path 24 in the cooling tank 21 b of the refrigerant tank 21. As in the case of the heating tank 21a, the cooling path 24 is maintained at a constant temperature of −40 ° C., so that the hydrogen gas passing through the cooling path 24 and passing through the cooling heat exchange section 24a is It is cooled to −40 degrees, supplied to the dispenser 13, and filled in the hydrogen gas tank Xa of the fuel cell vehicle X. Also in this case, since the temperature of the refrigerant R is −40 ° C. as described above, the hydrogen gas temperature in the hydrogen gas tank Xa being filled can be set to a temperature in a predetermined range of about −40 ° C. to −33 ° C.

  As described above, when the cooling temperature is controlled based on the detection result of the thermometer, the latent heat generated when the refrigerant R evaporates is used, so that the cooling temperature is kept constant and the temperature rises to a predetermined temperature range. Cooling can be performed stably. Moreover, since the latent heat is used by controlling the pressure of the refrigerant R, electricity can be automatically generated without necessity, and the configuration is simple and simple. In addition, there is no need for a pump for circulating the refrigerant R, power consumption can be reduced, and energy saving can be realized. In addition, the hydrogen gas filling facility 11 can be simplified and downsized.

  In particular, in the temperature raising channel A, the cryogenic liquefied hydrogen is directly heated to the target temperature and supplied, so that it is not necessary to cool the hydrogen gas, which is very efficient.

  Further, hydrogen gas is provided in two systems, ie, a path that supplies the accumulator 17 with a temperature rise (temperature increase flow path A) and a path that supplies the precool (pressure accumulation path B and precool flow path D). Since the supply is enabled, hydrogen gas can be effectively filled even when there is a filling interval in terms of time.

  In addition, when hydrogen gas is precooled and supplied, a precooler has been conventionally required. However, the refrigerant tank 21 of the gasifier 15 is provided with a heat exchanger 24a for cooling, and the gasifier 15 is provided. Since it is used for pre-cooling, it is possible to effectively use cold energy (cold heat recovery) and eliminate the need for a pre-cooler. Also in this respect, the hydrogen gas filling equipment 11 can be simplified and downsized, and maintenance is easy.

In addition, the temperature of the refrigerant R is kept constant by adjusting the pressure of the refrigerant R, and the latent heat of the refrigerant R at the boiling point without temperature change is used. Therefore, the temperature of the refrigerant R can be accurately controlled. As a result, appropriate temperature control of hydrogen gas can be performed.
If it adds about the collection | recovery of the cold heat mentioned above, the amount of cold heat | fever which can be collect | recovered will be a grade which can cover a medium-sized refrigerator as follows.
The approximate amount of cold energy that can be recovered is obtained by the following equation.

  When the temperature of liquefied hydrogen at −150 ° C. is adjusted to hydrogen gas at −40 ° C. and the capacity of the liquefied hydrogen pump 14 is 80 kg / hr, the cold energy of about 34.7 kW can be recovered from the above formula. become. Although a loss of about 20% can occur, the above-described cold heat is a value that can cover a medium-sized refrigerator as described above even when the loss is taken into consideration.

  Other examples will be described below. In this description, the same parts as those described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  The hydrogen gas filling equipment 11 shown in FIG. 2 is configured to have only the temperature raising channel A, and is different from the example of FIG. 1 in that it does not have the pressure accumulation channel B and the precool channel D. For this reason, the refrigerant tank 21 has only the temperature raising tank 21a.

  The hydrogen gas filling facility 11 having this configuration can be suitably used when there are a large number of fuel cell automobiles X filled with hydrogen gas and the filling interval is short.

  The hydrogen gas filling equipment 11 shown in FIG. 3 includes an existing hydrogen gas filling equipment 31, that is, a low-pressure gas evaporator 32 that vaporizes liquefied hydrogen in the liquefied hydrogen storage tank 12 to form low-pressure hydrogen gas, and a low-pressure hydrogen A compressor 33 that boosts the gas, a pressure accumulator 17 that stores the boosted hydrogen gas, a precooler (not shown) that precools the hydrogen gas delivered from the pressure accumulator 17, and a hydrogen gas that includes a dispenser 13 are supplied. It is a configuration that is effectively used for equipment. That is, a branch is provided between the liquefied hydrogen storage tank 12 and the gas feed evaporator 32 to form the temperature rising channel A, and the precooler is eliminated to form the precool channel D.

  The hydrogen gas filling equipment 11 having this configuration has the same operation as the hydrogen gas filling equipment 11 of FIG.

  The hydrogen gas filling equipment 11 shown in FIG. 4 is configured to effectively use cold heat. That is, the pressure adjusting means of the gasifier 15 is formed in the brine reservoir 35 filled with brine, the brine cooling path 36 that exits from the brine reservoir 35 and returns to the brine reservoir 35, and the brine cooling path 36. A primary heat exchanging part 36a located in the refrigerant tank 21 of the gasification apparatus 15, and a pressure regulator 37 provided in the brine cooling path 36 for adjusting the pressure of the refrigerant R in the refrigerant tank 21 to a specific pressure, The storage unit 35 is provided with a secondary heat exchange unit 38 for use of cold energy.

  The brine storage unit 35 is provided in the cooling tank 21b of the refrigerant tank 21 and stores appropriate brine. The primary heat exchange unit 36 a of the brine cooling path 36 performs heat exchange between the refrigerant R in the cooling tank 21 b and the brine in the cooling tank 21 b of the refrigerant tank 21. The pressure regulator 37 adjusts the amount of brine passing through the primary heat exchange unit 36 a based on the pressure gauge 37 a provided in the refrigerant tank 21. An appropriate fluid that requires cooling is passed through the secondary heat exchange unit 38. This fluid is, for example, a fluid used for pipe cooling or an appropriate refrigerator.

  In the hydrogen gas filling facility 11 having this configuration, cold heat can be effectively used not only for the hydrogen gas filling facility 11 but also for those not related to the hydrogen gas filling facility 11.

  FIG. 5 shows another example of the refrigerant tank 21 used in the gasifier 15 of the hydrogen gas filling facility 11. This is a configuration in which the refrigerant tank 21 (temperature raising tank 21a) including only one tank shown in FIG. In other words, if there is only one refrigerant tank 21 (temperature raising tank 21a), the refrigerant temperature is only set to the target temperature, but if multiple stages are used to accumulate cold heat in the upstream layer, Can keep cold heat for a long time.

  FIG. 5 shows an example in which the refrigerant tank 21 is composed of upper and lower two stages of an upper tank 27 and a lower tank 28. The upper tank 27 includes a pressure adjusting passage 29 as described above, and the pressure adjusting passage 29 includes a heat exchanger 29a and a pressure regulator 29b. The heat exchanger 29a is positioned inside the lower tank 28. The pressure adjuster 29b adjusts the opening degree based on the measurement result of the pressure gauge 29c provided in the lower tank 28.

  The lower tank 28 is also provided with a pressure adjusting passage 23c, and the pressure adjusting passage 23c is provided with a vaporizer 23a and a pressure regulator 23b. The pressure adjuster 23 b adjusts the opening degree based on the pressure of the refrigerant R in the lower tank 28.

  In the refrigerant tank 21 having such a configuration, for example, when the temperature of the refrigerant R in the lower tank 28 is higher than a desired −34 ° C., the pressure in the upper tank 27 is used to take cold heat from the refrigerant R in the upper tank 27. The adjuster 29b increases the opening based on the measurement result of the pressure gauge 29c in the lower tank 28. On the contrary, when the temperature of the refrigerant R in the lower tank 28 is lowered, the pressure regulator 23b of the lower tank 28 increases the opening degree to increase the pressure in the lower tank 28.

  The hydrogen gas filling equipment 11 having the refrigerant tank 21 having this configuration has an advantage that cold heat can be stored for a long time, for example, it is not necessary to use a spare refrigerator. As described above, the refrigerant tank 21 may have two or more stages.

  The above configuration is one form for carrying out the present invention, and the present invention is not limited to the above configuration, and other configurations can be adopted.

  For example, as the refrigerant R, in addition to carbon dioxide, for example, propane having a boiling point of 0.01 MPa at −42.09 ° C., propylene having a boiling point of −47.6 ° C. at 0.04 MPa, and the like can be used. .

DESCRIPTION OF SYMBOLS 11 ... Hydrogen gas filling equipment 12 ... Liquefied hydrogen storage tank 13 ... Dispenser 14 ... Liquefied hydrogen pump 15 ... Gasifier 17 ... Accumulator 21 ... Refrigerant tank 22 ... Temperature rising heat exchange path 23 ... Pressure adjustment means 23a ... Vaporizer 23b ... Pressure Adjuster 24a ... Heat exchange section for cooling 35 ... Brine storage tank 36 ... Brine cooling path 36a ... Primary heat exchange section 37 ... Pressure regulator 38 ... Secondary heat exchange section A ... Temperature rising flow path B ... Accumulation flow path D ... Precool Flow path R ... Refrigerant Ra ... Liquid phase part Rb ... Gas phase part

Claims (8)

A hydrogen gas supply device that supplies liquefied hydrogen in a liquefied hydrogen storage tank to a dispenser as hydrogen gas at a predetermined temperature,
A liquefied hydrogen pump that sends out the liquefied hydrogen in the liquefied hydrogen storage tank while increasing the pressure, and a gasifier that generates hydrogen gas at the predetermined temperature from the liquefied hydrogen sent out by the liquefied hydrogen pump,
A refrigerant tank having a liquid phase part and a gas phase part sealed with a liquid refrigerant whose boiling point at a specific pressure is a temperature at which hydrogen gas is heated to the predetermined temperature;
A heated heat exchange path passing through the refrigerant tank;
A hydrogen gas supply device comprising pressure adjusting means for adjusting the pressure of the refrigerant in the refrigerant tank to the specific pressure. The hydrogen gas supply apparatus according to claim 1, wherein the pressure adjusting means includes a vaporizer and a pressure regulator. The hydrogen gas supply device according to claim 1, wherein a cooling heat exchange section is provided in the refrigerant tank of the gasifier. A pre-cooling channel connecting the pressure accumulator storing hydrogen gas and the dispenser is provided;
3. The hydrogen gas supply device according to claim 1, wherein a cooling heat exchanging portion for exchanging heat in the refrigerant tank of the gasifier is formed in the precool channel. The pressure adjusting means includes a brine reservoir filled with brine, a brine cooling path that exits from the brine reservoir and returns to the brine reservoir, and is formed in the brine cooling path of the refrigerant tank of the gasifier. A primary heat exchanging unit located inside, and a pressure regulator provided in the brine cooling path to adjust the pressure of the refrigerant in the refrigerant tank to the specific pressure,
The hydrogen gas supply device according to claim 1, wherein the brine storage unit includes a secondary heat exchange unit for use of cold energy. A hydrogen gas supply method for supplying liquefied hydrogen to a dispenser as hydrogen gas at a predetermined temperature,
Pressurize the liquefied hydrogen and send it to the gasifier,
In the gasifier, the pressure of the refrigerant in a refrigerant tank having a liquid phase part and a gas phase part sealed with a liquid refrigerant whose boiling point at a specific pressure is a temperature at which hydrogen gas is heated to the predetermined temperature Is adjusted to the specific pressure,
Passing liquefied hydrogen through the refrigerant tank to produce hydrogen gas at the predetermined temperature,
A hydrogen gas supply method for supplying the generated hydrogen gas to the dispenser. The hydrogen gas supply method according to claim 6, wherein the hydrogen gas supplied from the pressure accumulator to the dispenser is precooled through the refrigerant tank of the gasifier. A liquefied hydrogen gasifier that converts liquefied hydrogen into hydrogen gas at a predetermined temperature,
A refrigerant tank having a liquid phase part and a gas phase part sealed with a liquid refrigerant whose boiling point at a certain pressure is a temperature at which hydrogen gas is heated to the predetermined temperature;
A heated heat exchange path passing through the refrigerant tank;
A liquefied hydrogen gasifier comprising pressure adjusting means for adjusting the pressure of the refrigerant in the refrigerant tank to the specific pressure.

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