Construction for multi-layered vacuum super insulated cryogenic tank
View Patent ↗A construction for a multi-layered vacuum super insulated cryogenic tank and a method for making the same is disclosed. The cryogenic tank uses an inner tank that is wrapped with multiple layers of radiation shielding and is suspended within a frame by one or more suspension members. The frame is enclosed within a fluid tight outer tank that fits snuggly against the frame. An ultra-high vacuum is created between the inner and outer tanks.
1. A method of manufacturing a cryogenic storage tank having an inner tank, a frame and an outer tank, the method comprising:
positioning the inner tank inside the frame with the frame being spaced apart from and extending around all sides of and encompassing an entirety of the inner tank, the frame having a plurality of openings extending therethrough;
supporting the inner tank inside the frame;
positioning the frame inside the outer tank with the frame in direct contact with the outer tank;
establishing a vacuum between the inner and outer tanks; and
entirely supporting the inner tank inside the frame with a plurality of suspension members exerting a tensile supporting force only.
2. The method of claim 1 , wherein the frame includes at least two pieces and further comprising:
attaching the inner tank to one of the pieces of the frame with at least one of said suspension members;
attaching the other pieces of the frame to the one piece of the frame thereby forming the frame; and
further comprising attaching the inner tank to the other pieces of the frame with other ones of said suspension members.
3. The method of claim 1 , further comprising securing the suspension members to the inner tank and securing the suspension members to the frame.
4. The method of claim 1 , wherein suspending the inner tank inside the frame includes suspending the inner tank inside the frame with at least one of a carbon fiber and a glass fiber suspension member.
5. The method of claim 1 , wherein the frame has at least one opening and further comprising routing at least one of said suspension members through the at least one opening in the frame.
6. The method of claim 1 , wherein the frame has a plurality openings and further comprising accessing the inner tank through the openings in the frame to suspend the inner tank inside the frame.
7. The method of claim 1 , wherein the outer tank includes at least two pieces and further comprising:
positioning the frame in one of the pieces of the outer tank; and
attaching the other pieces of the outer tank to the one piece to form the outer tank.
8. The method of claim 1 , wherein at least one of the inner tank, the frame and the outer tank is non-cylindrical.
9. The method of claim 1 , wherein the inner tank has relatively flat opposite top and bottom surfaces and supporting the inner tank inside the frame includes supporting at least one of the top and bottom surfaces.
10. The method of claim 1 , further comprising position insulation around the inner tank.
11. The method of claim 1 , further comprising storing hydrogen in the inner tank at a temperature less than about 100 degrees K.
12. A method of manufacturing a cryogenic storage tank having an inner tank, a frame and an outer tank, the method comprising:
positioning the inner tank inside the frame with the frame surrounding and encompassing an entirety of the inner tank and being spaced apart from the inner tank, the frame having a plurality of openings extending therethrough;
positioning the frame inside the outer tank, the outer tank including at least two pieces;
attaching the at least two pieces of the outer tank to one another, the attaching of the outer tank pieces together being distinct and separate from engagement of the outer tank with the frame;
establishing a vacuum between the inner and outer tanks; and
deforming the outer tank inwardly directly against the frame with the vacuum produced between the inner and outer tanks such that the frame directly supports the outer tank against the force of the vacuum and the outer tank thereby directly contacts with the frame due to the deformation.
13. The method of claim 12 , further comprising storing hydrogen in the inner tank at a temperature less than about 100 degrees K.
14. The method of claim 12 , further comprising entirely supporting the inner tank inside the frame with a plurality of suspension members exerting a tensile supporting force only.
15. The method of claim 12 , wherein the pieces of the outer tank are attached together by welding.