Conformable natural gas storage

1. A system for storing natural gas, comprising:

a plurality of straight sections of tube, wherein:

the plurality of straight sections of tube are dense packed;

the plurality of straight sections of tube are configured to fill a designated volume, and

the plurality of straight sections of tube are connected using reduced radius tube sections bent into a U-shape, wherein a taper to the reduced radius section from one of the plurality of straight tube sections stays within a predetermined mean curvature bound, wherein the predetermined mean curvature bound comprises a single constant mean curvature curve with mean curvature larger than ½ro, wherein ro is the radius of the plurality of straight sections of tube.

2. A system as in claim 1 , wherein the bent sections enable forming of a tank that fills the designated volume.

3. A system as in claim 1 , wherein the plurality of straight sections of tube comprise multiple long tubes with reduced radius sections that are joined together.

4. A system as in claim 1 , wherein the plurality of straight sections of tube have overbraided fibers.

5. A system as in claim 1 , wherein the taper to the reduced radius section from one of the plurality of straight sections has a continuously varying curvature.

6. A system as in claim 5 , wherein the continuously varying curvature enables the targeting of an optimized braid angle for an overbraid.

7. A system as in claim 6 , wherein the optimized braid angle for the overbraid comprises a hose angle, wherein the hose angle keeps an axial stress and a hoop stress in equilibrium.

8. A system as in claim 5 , wherein the taper targets optimization of an internal volume of a bend without exceeding a stress maximum of the bend.

9. A system as in claim 1 , wherein the plurality of straight sections of tubes comprises a metal tube.

10. A system as in claim 1 , wherein the plurality of straight sections of tubes comprises a polymer liner over-braided with a high strength fiber.

11. A system as in claim 10 , wherein the polymer liner is created as a single long tube comprising the plurality of straight sections of tube and the reduced radius tube sections.

12. A system as in claim 10 , wherein the polymer liner is molded separately, wherein multiple tubes of straight sections and multiple reduced radius tube sections are molded separately and then are joined together.

13. A method for storing natural gas, comprising:

providing a plurality of straight sections of tube, wherein:

the plurality of straight sections of tube are dense packed;

configuring the plurality of straight sections of tube to fill a designated volume,

and wherein the plurality of straight sections of tube are connected using reduced radius tube sections bent into a U-shape, wherein a taper to the reduced radius section from one of the plurality of straight tube sections stays within a predetermined mean curvature bound, wherein the predetermined mean curvature bound comprises a single constant mean curvature curve with mean curvature larger than ½ro, wherein ro is the radius of the plurality of straight sections of tube.