Cryogenic heat pipe
First Claim
Patent Images
1. A cryogenic heat pipe, comprising:
- a sealed tube having an inner diameter d where L<
d<
3L configured to circulate a cryogenic working fluid having a surface tension σ
, a liquid phase density ρ
1, a vapor phase density ρ
v, and a gravitational acceleration g, wherein L is the Laplace constant and L=[σ
/{(ρ
1−
ρ
v)g}]0.5; and
a vacuum container for containing the sealed tube, wherein said sealed tube comprises, at least one absorption portion configured to absorb heat and having a heat exchange length l where 15d<
l<
882d, and at least one dissipation portion configured to dissipate heat;
wherein said working fluid is a fluid selected from the group consisting of helium, hydrogen, and neon and mixtures thereof.
1 Assignment
0 Petitions
Accused Products
Abstract
In a cryogenic loop heat pipe, a working fluid for heat transport is contained in a loop capillary tube, and a portion of the loop capillary tube is used as a heat absorbing portion (A) while a portion other than the heat absorbing portion (A) is used as a heat dissipating portion (B). In this heat pipe, when the heat exchange length of the heat absorbing portion A of the capillary tube is represented by l, and the inner diameter of the capillary tube at the heat absorbing portion A is represented by d, l and d satisfy 15d<l<882d. When a Laplace constant L is given by L=[σ/{(ρ1−ρv)g}]0.5, the inner diameter d satisfies L<d<3L.
54 Citations
11 Claims
-
1. A cryogenic heat pipe, comprising:
-
a sealed tube having an inner diameter d where L<
d<
3L configured to circulate a cryogenic working fluid having a surface tension σ
, a liquid phase density ρ
1, a vapor phase density ρ
v, and a gravitational acceleration g, wherein L is the Laplace constant and L=[σ
/{(ρ
1−
ρ
v)g}]0.5; and
a vacuum container for containing the sealed tube, wherein said sealed tube comprises, at least one absorption portion configured to absorb heat and having a heat exchange length l where 15d<
l<
882d, andat least one dissipation portion configured to dissipate heat;
wherein said working fluid is a fluid selected from the group consisting of helium, hydrogen, and neon and mixtures thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification