Method of action of the pulsating heat pipe, its construction and the devices on its base

• US 20030037910A1
• Filed: 08/26/2002
• Published: 02/27/2003
• Est. Priority Date: 08/27/2001
• Status: Active Grant

• Current Assignee: Genrikh Smyrnov
• Original Assignee: Genrikh Smyrnov
• Inventors: Smyrnov, Genrikh
• Granted Patent: US 6,672,373 B2
• Time in Patent Office: Days
• US Class Current: 165/104.26
• CPC Class Codes: F28D 15/0266 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers F28D15/043 takes precedence
• CPC Class Codes: F28D 15/06 Control arrangements therefor

Abstract

By construction of heat pipes with two phase heat carrying fluid, an efficient heat transfer system is available. The heating section is used to create, within the heat pipe, build up of vapor pressure which causes the heat carrying fluid to move which then allows for dissipations of the heat into the cooling section. Additions to the system allow for storage of kinetic energy to enhance or regulate the flow, and by introduction of heating elements or porous surfaces, the mechanic can be improved or regulated.

Claims

1. The method of a pulsating heat pipe containing:

a) a heating, a transport, and a cooling zone linking their branches, b) filled by alternating liquid and vapor slugs of a two phase heat carrier, c) with circulation from one zone to another and back, with vaporization and condensation acting as driving force.

2. The pulsating heat pipe apparatus comprising:

a) continuous tube, b) formed as a system of branches with a cooling, a transport and a heating section to allow movement of the liquid and vapor slugs of the heat carrier, d) where maximum relative radius R*k of the said tube is corresponding the condition;

R*k<

2.2, where R*k=Rk/{square root}δ

/gΔ

ρ

,

e) and where the minimum relative length of the slug R*sl will not be lower than

ti R*sl≧

1.5−

2.0, where R*sl=Rsl/{square root}δ

/gΔ

ρ

and Rsl=[3Vsl/4w].

Where;

R*k—

the relative radius of a tube,

R*sl—

the relative equivalent radius of the slug,

Rk—

the radius or equivalent radius of a tube,

δ

—

the surface tension,

g—

the gravitation acceleration,

Δ

ρ

—

the difference of densities between of liquid and vapor of the heat carrier,

Vsl—

the volume of the slug,

π

=3.14.

3. The pulsating heat pipe according to claim 2, wherein the branches of the tubes have different dimensions of length and radiuses of tubes in the cooling and heating sections.

4. The pulsating heat pipe according to claim 3, wherein the tubes contain at least one bellow, which is joined within the tubes.

5. The pulsating heat pipe according to claim 3, wherein at least some parts of the branches of the tubes are made of elastic materials.

6. The pulsating heat pipe according to claim 3, wherein the tubes contain at least one sealed vessel with a liquid heat carrier with a noncondensable gas, and said vessel is joined to the tubes and divided from them by a barrier.

7. The pulsating heat pipe according to claim 6, wherein inside of the sealed vessel with the liquid heat carrier is installed a heater.

8. The pulsating heat pipe according to claim 3, wherein at least some of the internal surface of the tubes of the branches in the heating section has rough coatings alternating with smooth parts.

9. The pulsating heat pipe according to claim 3, wherein the tubes contain at least one porous insert with the azimuth and axial channels and heater.

10. The pulsating heat pipe according to claim 3, wherein the tubes contain at least one heater.

11. The pulsating heat pipe according to claim 3, wherein the parts of some branches of the tubes have on the parts of their surface reliable thermal contact with the cooling and heating sections of other branch of the tubes.

12. The pulsating heat pipe according to claim 9, wherein at least one of the heating sections of the tubes is located in one panel with the heater and at least one of the corresponding cooling sections is located in other panel with heat rejection means.