EA046074B1 - SUPPLY TANK WITH SIGNS OF DECREASED PRESSURE, SATURATION AND DECREASING SATURATION - Google Patents

Description

Claim of priority

This application claims priority to U.S. Provisional Application No. 62/983,901, filed March 2, 2020, the contents of which are incorporated herein by reference.

Field of invention

The invention relates generally to a cryogenic supply tank for filling with cryogenic fuel the on-board fuel tank of a vehicle or other consuming device and for pumping cryogenic fuel from the on-board fuel tank of a vehicle or other consuming device, more specifically, for filling and pumping out liquefied natural gas.

BACKGROUND OF THE INVENTION

Natural gas is suitable as an alternative fuel source to power vehicle engines. It is typically stored and transported as liquefied natural gas (LNG) because it occupies a much smaller volume (approximately 1/600th of its gaseous volume). Controlling the temperature and pressure of liquefied natural gas is very important. Liquefied natural gas is stored in insulated cryogenic tanks (also called cryogenic or isothermal tanks) due to the low temperature requirements (-160°C) and typically at low pressures. Additionally, the stored cryogenic liquid is typically saturated so that gaseous and liquid states exist simultaneously at the required temperature and pressure.

Vehicles using natural gas typically include the vehicle's on-board fuel tank. Vehicles' onboard fuel tanks may have specific pressure and temperature requirements. During liquefied natural gas filling into vehicle onboard fuel tanks and pumping out liquefied natural gas from vehicle onboard fuel tanks, it is generally necessary to reduce the pressure to cool the vapor space of the liquefied natural gas supply tank or increase the saturation pressure of the liquefied natural gas supply tank. Therefore, filling the fuel tanks of these vehicles can be a complex process.

A prior art system for controlling conditions in a cryogenic feed vessel, shown in FIG. 1 uses two additional tanks: a cryogenic tank 50 containing cryogenic liquid 51 and steam 52 and a high-pressure tank 40 containing cryogenic steam. The cryogenic liquid 51 may contain liquid nitrogen. The vapor inside the container 40 may contain natural gas. The supply tank, indicated generally by the reference numeral 10, includes an inner shell 30 and an outer shell 20. The supply tank 10 contains a cryogenic liquid 11 and steam 12. The cryogenic tank 50 is permanently connected by a supply line 52 to a first coil 70, which is installed in the steam space. or free space of the supply reservoir 10. The supply line 52 includes a valve or other known means for regulating the introduction of liquid from the reservoir 50, indicated generally by the reference numeral 53. The high pressure cylinder 40 is permanently connected through the supply line 42 to a second coil 80, which is soldered on on the inside of the outer shell 20 of the supply reservoir 10. The second supply conduit 42 includes a valve or other known means for regulating the introduction of gas from the reservoir 40, indicated generally by the reference numeral 43.

Reducing the pressure in the supply tank 10 in FIG. 1 is carried out by introducing liquefied nitrogen 51 from the tank 50 through the coil pipe 70 in the supply tank. This causes some of the steam 12 to condense and the pressure in the tank decreases. The liquefied nitrogen turns into cold nitrogen gas and exits from the top of the supply tank through the second end of the coil pipe 70 and is discharged through the outlet 71.

Saturation is accomplished by introducing natural gas from reservoir 40 into the supply reservoir through a second coil 80. Natural gas from reservoir 40 moves through coil 80 and is heated by heat transfer from the environment through the outer shell 20 and coil 80. The heated natural gas is transferred to the lower portion of the supply reservoir 10 and bubbles upward through the liquid, heating it. In this existing system, saturation reduction is only possible by depressurizing the entire supply reservoir, for example by venting the methane vapor 12 to the atmosphere or burning the methane vapor.

The above system uses two additional tanks and piping connections between each of the additional tanks and the supply tank. The processes of decreasing pressure, increasing saturation and decreasing saturation are complex.

It is desirable to offer a transportable cryogenic liquid supply tank to provide a simple and convenient solution for storing liquefied natural gas and corresponding filling and pumping of fuel tanks of liquefied natural gas vehicles.

The essence of the invention

There are several aspects of the present invention that may be embodied separately or together in the methods, devices and systems described and claimed below. These aspects may be embodied alone or in combination with other aspects of the invention described herein, and

- 1046074 the description of these aspects together is not intended to preclude the use of these aspects individually or the claims of such aspects individually or in different combinations as set forth in the appended claims.

In one aspect, a cryogenic liquid supply reservoir (also referred to as a supply reservoir) includes a vessel with an inner lining and an outer lining. The inner shell of the vessel defines an internal space designed to contain cryogenic liquid with free space above the cryogenic liquid. The supply vessel has a transfer pipe extending through the interior of the vessel and including a headspace coil located at an upper portion of the interior space and a liquid side coil located at a lower portion of the interior space. The transfer tube has a first outlet adjacent the headspace coil and a second outlet adjacent the liquid side coil. The first and second outlets of the transfer pipe are configured to be removably attached to the second reservoir.

In another aspect, a cryogenic liquid supply reservoir system (cryogenic liquid supply system) includes a first cryogenic liquid supply reservoir (also referred to as a supply reservoir) that includes a vessel with an inner shell and an outer shell. The inner shell of the vessel defines an internal space designed to contain cryogenic liquid with free space above the cryogenic liquid. The supply vessel has a transfer pipe extending through the interior of the vessel and including a headspace coil located at an upper portion of the interior space and a liquid side coil located at a lower portion of the interior space. The transfer tube has a first outlet adjacent the headspace coil and a second outlet adjacent the liquid side coil. The cryogenic liquid supply reservoir system also includes a second cryogenic reservoir. The second cryogenic tank has a second tank interior configured to hold a second cryogenic fluid with a second free space above the second cryogenic fluid. The second cryogenic tank has a gas outlet pipe and a liquid outlet pipe. The gas outlet pipe is in hydraulic communication with the upper part of the interior of the second reservoir and is configured to be removably connected to the second outlet. The liquid outlet pipe is in hydraulic communication with the lower part of the interior of the second reservoir and is configured to be removably connected to the first and/or second outlets of the transfer pipe.

In a further aspect, a method for adjusting the pressure of a first cryogenic liquid stored in a supply vessel includes providing a transfer pipe in an interior space of the vessel. The transfer pipe includes a headspace coil located at the top of the interior space and a liquid side coil located at the bottom of the interior space. The second cryogenic liquid is directed from the second reservoir first through the headspace coil and then through the liquid side coil, or is directed from the second reservoir first through the liquid side coil and then through the headspace coil. Alternatively, the gas from the second reservoir is directed first through the liquid side coil and then through the headspace coil so that a waste gas is obtained. The exhaust gas is then released.

In another aspect, a cryogenic liquid supply reservoir system (cryogenic liquid supply system) includes a first cryogenic liquid supply reservoir (also referred to as a supply reservoir) that includes a vessel with an inner shell and an outer shell. The inner shell of the vessel defines an internal space designed to contain cryogenic liquid with free space above the cryogenic liquid. The supply vessel has a transfer pipe extending through the interior of the vessel and including a headspace coil located at an upper portion of the interior space and a liquid side coil located at a lower portion of the interior space. The transfer tube has a first outlet adjacent the headspace coil and a second outlet adjacent the liquid side coil. The cryogenic liquid supply reservoir system also includes a second reservoir. The second reservoir has an interior space of the second reservoir designed to contain gas. The second tank has a gas outlet pipe. The gas outlet pipe is in hydraulic communication with the internal space of the second reservoir and is configured to be removably connected to the second outlet.

Brief description of drawings

Fig. 1 is a schematic diagram of a conventional cryogenic liquid supply tank system.

Fig. 2 is a schematic diagram of one embodiment of a supply reservoir according to the present disclosure.

Fig. 3 is a schematic diagram of one embodiment of a supply reservoir system according to the present disclosure.

Fig. 4 is a schematic representation of the pressure reduction operation of the present

- 2 046074 roofing.

Fig. 5 is a schematic diagram of the saturation operation of the present disclosure.

Fig. 6 is a schematic diagram of the desaturation operation of the present disclosure.

Fig. 7 is a schematic diagram of another embodiment of a supply reservoir according to the present disclosure.

Detailed Description of Embodiments

One embodiment of this disclosure provides a feed reservoir with a dual-coil transfer pipe, eliminating the need for separate first and second coil transfer pipe structures. One embodiment of this disclosure also eliminates the need for a second reservoir containing natural gas to regulate pressure and saturation.

Fig. 2 shows a cryogenic feed tank 100 of the present disclosure. The cryogenic tank 100 is used to store cryogenic liquid. For example, cryogenic liquids may be at least one of nitrogen, helium, neon, argon, krypton, carbon dioxide, hydrogen, liquefied natural gas and oxygen, although other types of gases are also within the scope of this disclosure. In a preferred embodiment, cryogenic supply tank 100 is used for storing and dispensing liquefied natural gas.

In the illustrated embodiment, the supply reservoir 100 has an inner shell 300 and an outer shell 200, the inner shell defining the interior of the reservoir. Cryogenic liquid 101 is stored in the interior space of the inner shell 300. Cryogenic liquid 101 occupies a specific volume of the supply tank 100, and the remaining volume is occupied by cryogenic gas or vapor 102. The liquid level 103 is given for illustrative purposes, but the liquid level may vary, especially under different events ( delivery of LNG, withdrawal of LNG).

The supply tank 100 has a two-coil transfer pipe 110 installed inside the inner shell 300 of the supply tank. The two-coil transfer pipe 110 may be installed by any means known in the art. In the illustrated embodiment, as shown in Figure 2, the transfer pipe 110 includes two coil sections defining a headspace coil 111 and a liquid side coil 112. The transfer pipe 110 may include more or less than two coil sections in different embodiments. Coil sections 111 and 112 are located in the interior of the cryogenic feed tank. Coil sections 111 and 112 may use any coil shape known in the art. Coil sections 111 and 112 may be located in different parts of the inner shell 300 of the supply tank 100. As shown in Figure 2, coil section 111 is located at the top of the vessel, at least partially in the cryogenic gas section 102, while coil section 112 located at the bottom of the vessel, at least partially in the cryogenic liquid section 101.

The dual coil transfer pipe 110 has a first pipe outlet 601 and a second pipe outlet 602 at the other end. The first and second pipe outlets 601 and 602 may be located on different sides of the feed tank 100. In a preferred embodiment, the first pipe outlet 601 is located on the top of the feed tank vessel and the second pipe outlet 602 is located on one side of the feed tank. Both pipe outlets may be located outside the supply reservoir 100. Both pipe outlets may also be located flush with the edge of the vessel or partially inside the vessel. As shown in FIG. 2, both pipe outlets are accessible from the outside of the supply tank vessel 100. Although specific details are not shown in the figures, both pipe outlets (601 and 602) may have a number of special fittings. For example, each may include a removable and reusable seal. Each outlet may also include a valve or outlet. The cross sections of this pipe and other structures can have various shapes, such as circular, elliptical, square, triangular, pentagonal, hexagonal, polygonal and other shapes.

Each of the coil sections 111 and 112 may be located in close proximity to or adjacent to the first and second pipe outlets 601 and 602. In the illustrated embodiment, the first coil section 111 is adjacent to the first pipe outlet 601 and the coil section 112 is adjacent to the second pipe exit 602.

In the illustrated embodiment, cryogenic feed tank 100 is a vertical tank. In other embodiments, the reservoir 100 may be a horizontal reservoir.

The cryogenic feed tank 100 of the present invention, although shown as double-walled, may also be single-walled or triple-walled. The cryogenic tank may be made of copper alloy, nickel alloy, carbon, stainless steel, or any other material known in the art.

Cryogenic feed tank 100 may have insulation between the inner and outer walls (or shells) and/or may be vacuum insulated. For insulation, single-layer or multi-layer insulation from any known materials can be used.

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The inner vessel 300 may be connected to the outer vessel 200 by one or more inner vessel supporting members. For example, as is known in the art, the inner vessel supporting member may connect the neck and base of the inner vessel to the outer vessel.

The cryogenic tank 100 may include devices or sensors for sensing various characteristics of the tank. These devices or sensors can indicate pressure, temperature, differential pressure, liquid level, etc.

In the embodiment of FIG. 2 or any other embodiments of the present disclosure, the supply tank 100 includes at least one pipe for filling or discharging liquefied natural gas from the tank. In one embodiment, there is a separate fill pipe and a separate drain pipe. There may also be other paths from the inner vessel for filling and removing liquid. The fill and discharge pipes may be any suitable conduit for transporting or allowing fluid to flow through it.

Fig. 3 illustrates an embodiment of a cryogenic feed tank system according to the present disclosure. In the illustrated embodiment, there is a second reservoir for connection to the cryogenic supply reservoir 100. In one embodiment, the second reservoir is a cryogenic reservoir. The cryogenic tank 500 has a gas discharge pipe 520 and a liquid discharge pipe 510, the aforementioned liquid discharge pipe including a dip pipe. Although shown separately in this figure, the outlets may alternatively be combined into a single top outlet from the reservoir 500. The outlet pipes 520 and 510 may be connected to the first and second outlets 601 and 602 of the transfer pipe 110 with two coils of the feed reservoir 100. The cryogenic pipe outlets the reservoir 500 can be connected by a flexible hose to one or another outlet of the transfer pipe 110 with two coils. Although flexible hose is the preferred means of connection, the pipes of each tank may be connected by any other known means of connection, including, but not limited to, insulated conduit. The connection means may be permanent or temporary and may consist of any conduits, tubes, hoses or related conduits. Additionally, the pipe outlets of the cryogenic tank 500 may be selectively connected to the outlets 601 and 602 of the tank 100 by conduits that include one or more valves 511 and 521 for directing fluid from the tank 500 to one or another outlet 601 or 602 as described. below configurations.

The second cryogenic tank 500 has an inner shell 600 and an outer shell 700. Cryogenic liquid 501 is stored in the inner shell 600. The cryogenic liquid occupies a specific volume of the cryogenic tank 500, and the remaining volume is occupied by cryogenic gas or vapor 502. The liquid level is shown in the figures for illustrative purposes. but the liquid level may change, especially during various events (dispensing cryogenic liquids or gas, etc.).

In the illustrated embodiment, the second cryogenic tank 500 is a vertical storage tank. In other embodiments, the reservoir 500 may be a horizontal storage reservoir.

The cryogenic feed tank 500 of the present invention, although shown as double-walled, may also be single-walled or triple-walled. The cryogenic tank may be made of copper alloy, nickel alloy, carbon, stainless steel, or any other material known in the art.

The cryogenic tank 500 may also include devices or sensors for reading various characteristics of the tank. These devices or sensors can indicate pressure, temperature, differential pressure, liquid level, etc.

The second reservoir may be a gas reservoir in another embodiment. It may be a high pressure gas tank. The high pressure gas may be nitrogen. In this embodiment, the second reservoir is filled with gas and contains no liquid. The second tank has a gas outlet pipe. The gas outlet pipe may be connected to the first and second outlets 601 and 602 of the two-coil transfer pipe 110 of the supply tank 100. The gas reservoir pipe outlets may be connected by a flexible hose to one or another outlet of the two-coil transfer pipe 110. Although flexible hose is the preferred means of connection, the pipes of each tank may be connected by any other known means of connection, including, but not limited to, insulated conduit. The connection means may be permanent or temporary and may consist of any conduits, tubes, hoses or related conduits. Additionally, the gas reservoir pipe outlet may be selectively connected to outlets 601 and 602 of reservoir 100 by conduits that include one or more valves for directing gas from the reservoir to one or another outlet 601 or 602 in accordance with the configurations described below.

Fig. 4 illustrates the pressure reduction configuration of the cryogenic feed tank system of the present disclosure, indicated generally by reference numeral 801. When the feed tank 100 needs to be reduced in pressure, the operator connects the cryogenic feed fluid outlet 510

- 4 046074 tank 500 with supply tank 100 at the first outlet 601 of transfer pipe 110 with two coils. As shown by the arrows in Figure 4, the cold liquid from the reservoir 500 passes through the transfer pipe 110 inside the supply reservoir 100 from the first pipe outlet 601 to the second pipe outlet 602. Cold liquid from reservoir 500 will cause gas 102 to condense while in coil section 111 and cause a pressure drop in the supply reservoir. As it continues to move through the transfer pipe 110, the liquid changes its state to a gas and exits the pipe outlet 602 as a gas.

Fig. 5 illustrates the saturation configuration of the cryogenic feed tank system of the present disclosure, indicated generally by reference numeral 802. When the saturation pressure of the cryogenic fluid 101 needs to be increased, the operator connects the gas release pipe 520 of the cryogenic tank 500 to the outlet 602 of the transfer pipe 110 to the two coils of the feed tank 100. As shown by the arrows in FIG. 5, warm gas 502 passes through the two-coil transfer pipe 110 from the second pipe outlet 602 to the first pipe outlet 601 and is discharged as cooler gas. The warm gas heats the cryogenic liquid 101 while in the coil section 112 and increases the temperature and thus the saturation pressure of the cryogenic liquid.

Saturation can also be carried out when the second reservoir is a gas reservoir. When the saturation pressure of the cryogenic liquid 101 needs to be increased, the operator connects the gas tank gas outlet pipe 520 to the outlet 602 of the transfer pipe 110 to the two coils of the feed tank 100. The warm gas flows through the two coil transfer pipe 110 from the second pipe outlet 602 to the first pipe outlet 601 and is released as a colder gas. The warm gas heats the cryogenic liquid 101 while in the coil section 112 and increases the temperature and thus the saturation pressure of the cryogenic liquid.

Fig. 6 illustrates the desaturation configuration of the cryogenic feed tank system of this disclosure, indicated generally by reference numeral 803. When the saturation pressure of the cryogenic fluid needs to be reduced, the liquid outlet pipe 510 of the cryogenic feed tank 500 is connected to the second outlet 602 of the transfer pipe 110 with two coils of the cryogenic feed tank 10 As shown by the arrows in Figure 6, the cold cryogenic liquid 501 is passed through the two-coil transfer tube 110 from the second tube outlet 602 to the first tube outlet 601. The cold liquid 501 cools the cryogenic liquid 101 and exits the first pipe outlet 601 as a cold gas. The saturation pressure of the cryogenic liquid will decrease.

Fig. 7 illustrates an additional embodiment of a cryogenic feed tank 104 of the present disclosure. Cryogenic tank 104 is used to store cryogenic liquid. For example, cryogenic liquids may be at least one of nitrogen, helium, neon, argon, krypton, carbon dioxide, hydrogen, liquefied natural gas and oxygen, although other types of gases are also within the scope of this disclosure. In a preferred embodiment, cryogenic supply tank 104 is used for storing and dispensing liquefied natural gas.

In the illustrated embodiment, the supply reservoir 104 has an inner shell 300 and an outer shell 200, the inner shell defining the interior of the reservoir. Cryogenic liquid 101 is stored in the interior space of the inner shell 300. Cryogenic liquid 101 occupies a specific volume of the supply reservoir 104, and the remaining volume is occupied by cryogenic gas or vapor 102. The liquid level 103 is given for illustrative purposes, but the liquid level may vary, especially under different events ( delivery of LNG, withdrawal of LNG).

The supply tank 105 has two transfer pipes 113 and 114 installed inside the inner shell 300 of the supply tank. Transfer pipes 113 and 114 can be installed by any means known in the art. In the illustrated embodiment, as shown in Figure 7, the first transfer pipe 113 includes a coil section defining a headspace coil 111. The second transfer tube 114 includes a coil section 112. The coil sections 111 and 112 are located in the interior of the cryogenic feed tank. Coil sections 111 and 112 may use any coil shape known in the art. As shown in Figure 7, coil section 111 is located at the top of the vessel, at least partially in the cryogenic gas section 102, while coil section 112 is located at the bottom of the vessel, at least partially in the cryogenic liquid section 101.

The transfer pipe 113 has a first pipe outlet 604 and a second pipe outlet 607 at the other end. The transfer pipe 114 has a first pipe outlet 605 and a second pipe outlet 606 at the other end. Pipe outlets 604, 605, 606 and 607 may be located on different sides of the feed tank 104. In a preferred embodiment, the first pipe outlets 604 and 605 are located on the top of the feed tank vessel, and the second pipe outlets 606 and 607 are located on one side of the feed tank . The pipe outlets may be located on the outside of the supply vessel 104. The pipe outlets may also be located flush with the edge of the vessel or partially inside the vessel. As shown in FIG. 7, the pipe outlets are accessible from the outside of the supply tank vessel 104. Although specific details are not shown in

- 5 046074 figures, pipe outlets (604, 605, 606 and 607) can have a number of special fittings. For example, each may include a removable and reusable seal. Each outlet may also include a valve or outlet. The cross sections of this pipe and other structures can have various shapes, such as circular, elliptical, square, triangular, pentagonal, hexagonal, polygonal and other shapes.

Each of the coil sections 111 and 112 may be located in close proximity to or adjacent to pipe outlets 604, 605, 606 and 607. In the illustrated embodiment, the first coil section 111 is adjacent to the first pipe outlets 604 and 605, and the coil section 112 is adjacent to the second pipe outlets 606 and 607.

In the illustrated embodiment, the cryogenic feed tank 104 is a vertical tank. In other embodiments, the reservoir 104 may be a horizontal reservoir.

The cryogenic feed tank 104 of the present invention, although shown as double-walled, may also be single-walled or triple-walled. The cryogenic tank may be made of copper alloy, nickel alloy, carbon, stainless steel, or any other material known in the art.

The cryogenic feed tank 104 may have insulation between the inner and outer walls (or shells) and/or may be vacuum insulated. For insulation, single-layer or multi-layer insulation from any known materials can be used.

The inner vessel 300 may be connected to the outer vessel 200 by one or more inner vessel supporting members. For example, as is known in the art, the inner vessel supporting member may connect the neck and base of the inner vessel to the outer vessel.

The cryogenic tank 104 may include devices or sensors for sensing various characteristics of the tank. These devices or sensors can indicate pressure, temperature, differential pressure, liquid level, etc.

In the embodiment of FIG. 7 or any other embodiments of the present disclosure, the supply tank 104 includes at least one pipe for filling or discharging liquefied natural gas from the tank. In one embodiment, there is a separate fill pipe and a separate drain pipe. There may also be other routes from the inner vessel for filling and removing liquid. The fill and discharge pipes may be any suitable conduit for transporting or allowing fluid to flow through it.

Although preferred embodiments of this disclosure have been shown and described above, those skilled in the art will appreciate that changes and modifications may be made thereto without departing from the spirit of this disclosure, the scope of which is defined by the following claims.

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Claims (11)

CLAIM 1. A cryogenic liquid supply tank system comprising: a vessel comprising an inner shell and an outer shell, the inner shell defining an interior space designed to contain a first liquefied natural gas cryogenic liquid with a liquefied natural gas-free space above the liquefied natural gas; a transfer pipe extending through the interior of the vessel, including a free space coil located at an upper portion of the interior space and a liquid side coil located at a lower portion of the interior space; wherein the transfer pipe has a first outlet adjacent to the headspace coil and a second outlet adjacent to the liquid side coil; and a second cryogenic tank, including: an interior space of a second reservoir configured to hold a second cryogenic liquid with a second free space above the second cryogenic liquid, a gas release pipe in fluid communication with an upper portion of the interior of the second reservoir and configured to be releasably connected to the second outlet, and a liquid release pipe in fluid communication with the lower part of the internal space of the second tank and configured to be detachably connected to the first or second outlets. 2. The cryogenic liquid supply reservoir system of claim 1, wherein the first outlet is located on or protruding from the top of the outer casing and the second outlet is located on or protruding from the side of the outer casing. 3. The cryogenic liquid supply reservoir system of claim 1, wherein the second outlet is located on or protruding from a lower portion of a side of the outer shell. 4. The cryogenic liquid supply reservoir system of claim 1, wherein the single coil includes a headspace coil and a liquid side coil. 5. The cryogenic liquid supply reservoir system of claim 1, wherein the headspace coil is separate and spaced from, but hydraulically communicating with, the liquid side coil. 6. The cryogenic liquid supply reservoir system according to claim 1, wherein the second cryogenic liquid is the same as the first cryogenic liquid. 7. The cryogenic liquid supply reservoir system of claim 1, wherein the second cryogenic liquid is different from the first cryogenic liquid. 8. The cryogenic liquid supply reservoir system of claim 1, wherein the second cryogenic liquid is liquid nitrogen and the second gas is nitrogen. 9. The cryogenic liquid supply reservoir system according to claim 1, further comprising one or more flexible hoses configured to removably connect a gas outlet pipe to a second outlet and a liquid outlet pipe to the first or second outlets. 10. The cryogenic liquid supply reservoir system of claim 1, further comprising a plurality of conduits including one or more valves configured to selectively connect a gas outlet pipe to a second outlet and a liquid outlet pipe to the first or second outlets. 11. A cryogenic liquid supply tank system comprising: a vessel comprising an inner shell and an outer shell, the inner shell defining an interior space configured to contain a first cryogenic liquid with a space above the first cryogenic liquid free of the first cryogenic liquid; a transfer pipe extending through the interior of the vessel, including a free space coil located at an upper portion of the interior space and a liquid side coil located at a lower portion of the interior space; wherein the transfer pipe has a first outlet adjacent to the headspace coil and a second outlet adjacent to the liquid side coil; and a second cryogenic tank, including: an interior space of a second tank configured to hold a second cryogenic liquid of liquid nitrogen with a second free space above the liquid nitrogen, a gas release pipe fluidly communicating with an upper portion of the interior space of the second tank and removably coupled to the second outlet, and a release pipe liquid, hydraulically communicating with the lower part of the internal space of the second tank and configured to be detachably connected to the first or second outlets. -