CA2170583A1 - Cryogenic storage container - Google Patents
Cryogenic storage containerInfo
- Publication number
- CA2170583A1 CA2170583A1 CA002170583A CA2170583A CA2170583A1 CA 2170583 A1 CA2170583 A1 CA 2170583A1 CA 002170583 A CA002170583 A CA 002170583A CA 2170583 A CA2170583 A CA 2170583A CA 2170583 A1 CA2170583 A1 CA 2170583A1
- Authority
- CA
- Canada
- Prior art keywords
- layer
- storage container
- storage cavity
- plywood
- insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/031—Dealing with losses due to heat transfer
- F17C2260/033—Dealing with losses due to heat transfer by enhancing insulation
Abstract
This cryogenic storage container has peripheral walls defining a storage cavity. The storage cavity has an access opening closed by a closure. A cryogenic freezing unit is provided whereby the storage cavity is cooled. The characterizing feature of the storage container is that the peripheral walls and closure are of multi-layered construction.
More particulary, the layers include: an inner plastic liner;
a cloth layer; a first insulation layer; a plywood layer; a second insulation layer; a reflective foil layer; and an outer protective shell. The cloth layer is impregnated with carbon and coated on at least one side by urethane. The plywood layer is made of a hardwood. The reflective layer has a reflective surface oriented inwardly toward the plastic liner.
More particulary, the layers include: an inner plastic liner;
a cloth layer; a first insulation layer; a plywood layer; a second insulation layer; a reflective foil layer; and an outer protective shell. The cloth layer is impregnated with carbon and coated on at least one side by urethane. The plywood layer is made of a hardwood. The reflective layer has a reflective surface oriented inwardly toward the plastic liner.
Description
TITLE OF THE INVENTION:
cryogenic storage container NAME OF INVENTOR:
Joseph Iwasenko FIELD OF THE INVENTION
The present invention relates to a cryogenic storage container.
R~ ROUND OF THE INVENTION
The term "cryogenics" has come to be associated with the technology of producing temperatures below 120 degrees Kelvin.
Temperatures this low do not exist on earth under natural conditions. In order for a cryogenic storage container to be effective, it must be capable of contA;n;ng the cold. If the cold is not effectively contained within the container, the cryogenic freezing unit must operate continuously to replace the temperature loss to atmosphere. The key to contA;ning the cold lies in the construction of the walls of the cryogenic storage container.
SUMMARY OF THE INVENTION
What is required is a cryogenic storage container having walls capable of contAining the cold.
According to the present invention there is provided a cryogenic storage container having peripheral walls defining a storage cavity. The storage cavity has an access opening closed by a closure. A cryogenic freezing unit is provided whereby the storage cavity is cooled. The characterizing feature of the storage container is that the peripheral walls and closure are of multi-layered construction. More particulary, the layers include: an inner plastic liner; a cloth layer; a first insulation layer; a plywood layer; a second insulation layer; a reflective foil layer; and an outer protective shell. The cloth layer is impregnated with carbon and coated on at least one side by urethane. The plywood layer is made of a hardwood.
BRIEF D~CPTPTION OF THE DRAnINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, wherein:
FIGURE 1 is a top plan view, in section, of a cryogenics storage container.
FIGURE 2 is a detailed top plan view, in section, of a wall of the cryogenics storage container illustrated in FIGURE
1.
TT.~n ~CPTPTION OF THE rK~nK~ EMBODI~ENT
The preferred embodiment, a cryogenics storage container generally identified by reference numeral 10, will now be de~cribed with reference to FIGURES 1 and 2.
Referring to FIGURE 1, cryogenic storage container 10 has peripheral walls 12 defining a storage cavity 14. Storage cavity 14 has an access opening 16 which is closed by a closure 18. A cryogenic freezing unit 20 is provided whereby storage cavity 14 is cooled.
3 ~1 70583 Referring to FIGURE 2, the characterizing feature of storage container 10 is that peripheral walls 12 and closure 18 are of multi-layered construction. The layers include: an inner plastic liner 22; a cloth layer 24; a first insulation layer 26; a plywood layer 28; a second insulation layer 30; a reflective foil layer 32; and an outer protective shell 34.
It is preferred that inner plastic liner 22 be of urethane. The reason for this is that the urethane can contain cold up to 212 degrees celsius and is light, durable and easy to clean. Cloth layer 24 is impregnated with carbon. The carbon impregnation is achieved through the use of a graphite power mixed with an epoxy resin which is applied to the cloth in the form of a spray. It is preferred that cloth layer 24 be completed by coating one side with a urethane spray approximately 1/16 of an inch in thickness. First insulation layer 26 can be of urethane insulation, fibreglass insulation or other insulation with similar insulating qualities. It is preferred that the insulation value of the insulation be effective to -80 celsius. Plywood layer 28 is, preferably, made from birch hardwood. Second insulation layer 30, as with first insulation layer 26, can be made from a variety of alternative materials. Reflective foil layer 32 has a pair of opposed reflective surfaces 36. It is preferred that an aluminum foil insulation be used for reflective foil layer 32. Aluminum foil insulation has a central insulating layer sandwiched between layers of aluminum foil. Outer protective shell 34 is preferably made of metal or any other material that provides protection against impact damage.
The manner in which cryogenics storage container 10 contains the cold will now be described. Urethane has been chosen for inner plastic liner 22 because it can contain cold, is durable and easy to clean. Carbon cloth layer 24 has a unique property in that the carbon with which cloth layer 24 is impregnated does not absorb the cold. The carbon also serves a secondary functions; it does not burn and, therefore, provides a measure of fire protection. The urethane spray provides some degree of insulation, but is primarily intended to provide a seal with inner plastic liner 22. First insulation layer 26 and second insulation layer 30 are intended to serve an insulating function. While various types of insulation can be used, in order to minimize the wall thickness of cryogenics storage container 10, a 1 inch thick layer of R40 urethane insulation is used. Positioned between first insulation layer 26 and second insulation layer 30 is layer 28 of birch plywood. Birch plywood layer 28 need not be very thick; 1/8 of an inch is adequate. The purpose of the layer is to restrict passage of cold from first insulation layer 26 to second insulation layer 30. Birch, being a hardwood, is not very porous. Unlike softwoods, such as spruce, which has oxygen pockets; birch serves as a barrier which makes first insulation layer 26 and second insulation layer 30 more effective than a single layer of insulation more than twice as thick. Reflective foil layer 32 serves an insulation function but, more importantly, serves as a barrier to the penetration of warmth. In cryogenics units, an atmosphere of other than oxygen is used. The reason for this is that at the temperatures attained an oxygen atmosphere will results in "freezer burn". Oxygen is a heavier gas than helium or some of the other gases that one might use. There is, therefore, a greater danger of penetration from the exterior than penetration from the inside out. Reflective foil layer 32 helps to prevent this penetration. Outer protective shell 34 provides impact protection to the other layers, as described above.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embo~ nt without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
cryogenic storage container NAME OF INVENTOR:
Joseph Iwasenko FIELD OF THE INVENTION
The present invention relates to a cryogenic storage container.
R~ ROUND OF THE INVENTION
The term "cryogenics" has come to be associated with the technology of producing temperatures below 120 degrees Kelvin.
Temperatures this low do not exist on earth under natural conditions. In order for a cryogenic storage container to be effective, it must be capable of contA;n;ng the cold. If the cold is not effectively contained within the container, the cryogenic freezing unit must operate continuously to replace the temperature loss to atmosphere. The key to contA;ning the cold lies in the construction of the walls of the cryogenic storage container.
SUMMARY OF THE INVENTION
What is required is a cryogenic storage container having walls capable of contAining the cold.
According to the present invention there is provided a cryogenic storage container having peripheral walls defining a storage cavity. The storage cavity has an access opening closed by a closure. A cryogenic freezing unit is provided whereby the storage cavity is cooled. The characterizing feature of the storage container is that the peripheral walls and closure are of multi-layered construction. More particulary, the layers include: an inner plastic liner; a cloth layer; a first insulation layer; a plywood layer; a second insulation layer; a reflective foil layer; and an outer protective shell. The cloth layer is impregnated with carbon and coated on at least one side by urethane. The plywood layer is made of a hardwood.
BRIEF D~CPTPTION OF THE DRAnINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, wherein:
FIGURE 1 is a top plan view, in section, of a cryogenics storage container.
FIGURE 2 is a detailed top plan view, in section, of a wall of the cryogenics storage container illustrated in FIGURE
1.
TT.~n ~CPTPTION OF THE rK~nK~ EMBODI~ENT
The preferred embodiment, a cryogenics storage container generally identified by reference numeral 10, will now be de~cribed with reference to FIGURES 1 and 2.
Referring to FIGURE 1, cryogenic storage container 10 has peripheral walls 12 defining a storage cavity 14. Storage cavity 14 has an access opening 16 which is closed by a closure 18. A cryogenic freezing unit 20 is provided whereby storage cavity 14 is cooled.
3 ~1 70583 Referring to FIGURE 2, the characterizing feature of storage container 10 is that peripheral walls 12 and closure 18 are of multi-layered construction. The layers include: an inner plastic liner 22; a cloth layer 24; a first insulation layer 26; a plywood layer 28; a second insulation layer 30; a reflective foil layer 32; and an outer protective shell 34.
It is preferred that inner plastic liner 22 be of urethane. The reason for this is that the urethane can contain cold up to 212 degrees celsius and is light, durable and easy to clean. Cloth layer 24 is impregnated with carbon. The carbon impregnation is achieved through the use of a graphite power mixed with an epoxy resin which is applied to the cloth in the form of a spray. It is preferred that cloth layer 24 be completed by coating one side with a urethane spray approximately 1/16 of an inch in thickness. First insulation layer 26 can be of urethane insulation, fibreglass insulation or other insulation with similar insulating qualities. It is preferred that the insulation value of the insulation be effective to -80 celsius. Plywood layer 28 is, preferably, made from birch hardwood. Second insulation layer 30, as with first insulation layer 26, can be made from a variety of alternative materials. Reflective foil layer 32 has a pair of opposed reflective surfaces 36. It is preferred that an aluminum foil insulation be used for reflective foil layer 32. Aluminum foil insulation has a central insulating layer sandwiched between layers of aluminum foil. Outer protective shell 34 is preferably made of metal or any other material that provides protection against impact damage.
The manner in which cryogenics storage container 10 contains the cold will now be described. Urethane has been chosen for inner plastic liner 22 because it can contain cold, is durable and easy to clean. Carbon cloth layer 24 has a unique property in that the carbon with which cloth layer 24 is impregnated does not absorb the cold. The carbon also serves a secondary functions; it does not burn and, therefore, provides a measure of fire protection. The urethane spray provides some degree of insulation, but is primarily intended to provide a seal with inner plastic liner 22. First insulation layer 26 and second insulation layer 30 are intended to serve an insulating function. While various types of insulation can be used, in order to minimize the wall thickness of cryogenics storage container 10, a 1 inch thick layer of R40 urethane insulation is used. Positioned between first insulation layer 26 and second insulation layer 30 is layer 28 of birch plywood. Birch plywood layer 28 need not be very thick; 1/8 of an inch is adequate. The purpose of the layer is to restrict passage of cold from first insulation layer 26 to second insulation layer 30. Birch, being a hardwood, is not very porous. Unlike softwoods, such as spruce, which has oxygen pockets; birch serves as a barrier which makes first insulation layer 26 and second insulation layer 30 more effective than a single layer of insulation more than twice as thick. Reflective foil layer 32 serves an insulation function but, more importantly, serves as a barrier to the penetration of warmth. In cryogenics units, an atmosphere of other than oxygen is used. The reason for this is that at the temperatures attained an oxygen atmosphere will results in "freezer burn". Oxygen is a heavier gas than helium or some of the other gases that one might use. There is, therefore, a greater danger of penetration from the exterior than penetration from the inside out. Reflective foil layer 32 helps to prevent this penetration. Outer protective shell 34 provides impact protection to the other layers, as described above.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embo~ nt without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (6)
1. A cryogenic storage container having peripheral walls defining a storage cavity, the storage cavity having an access opening closed by a closure, a cryogenic freezing unit being provided whereby the storage cavity is cooled, characterized by:
the peripheral walls and closure being of multi-layered construction, the layers including:
an inner plastic liner;
a cloth layer, the cloth being impregnated with carbon;
a first insulation layer;
a plywood layer, the plywood being hardwood;
a second insulation layer; and an outer protective shell.
the peripheral walls and closure being of multi-layered construction, the layers including:
an inner plastic liner;
a cloth layer, the cloth being impregnated with carbon;
a first insulation layer;
a plywood layer, the plywood being hardwood;
a second insulation layer; and an outer protective shell.
2. The cryogenics storage container as defined in Claim 1, wherein a reflective foil layer is provided inside the outer protective shell, the reflective foil layer having at least one reflective surface.
3. The cryogenics storage container as defined in Claim 1, wherein the plastic liner is urethane.
4. The cryogenics storage container as defined in Claim 1, wherein the plywood layer is birch.
5. The cryogenics storage container as defined in Claim 1, wherein the cloth is impregnated with a graphite/epoxy resin.
6. A cryogenic storage container having peripheral walls defining a storage cavity, the storage cavity having an access opening closed by a closure, a cryogenic freezing unit being provided whereby the storage cavity is cooled, characterized by:
the peripheral walls and closure being of multi-layered construction, the layers including:
an inner urethane plastic liner;
a carbon cloth layer, the carbon cloth being impregnated with a graphite/epoxy resin and coated on at least one side by urethane;
a first insulation layer;
a plywood layer, the plywood being birch;
a second insulation layer;
a reflective foil layer having opposed reflective surfaces with insulation positioned inbetween; and an outer protective shell.
the peripheral walls and closure being of multi-layered construction, the layers including:
an inner urethane plastic liner;
a carbon cloth layer, the carbon cloth being impregnated with a graphite/epoxy resin and coated on at least one side by urethane;
a first insulation layer;
a plywood layer, the plywood being birch;
a second insulation layer;
a reflective foil layer having opposed reflective surfaces with insulation positioned inbetween; and an outer protective shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002170583A CA2170583A1 (en) | 1996-02-28 | 1996-02-28 | Cryogenic storage container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002170583A CA2170583A1 (en) | 1996-02-28 | 1996-02-28 | Cryogenic storage container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2170583A1 true CA2170583A1 (en) | 1997-08-29 |
Family
ID=4157649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002170583A Abandoned CA2170583A1 (en) | 1996-02-28 | 1996-02-28 | Cryogenic storage container |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2170583A1 (en) |
-
1996
- 1996-02-28 CA CA002170583A patent/CA2170583A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |