Heat Pipe Bending Tool
Wakefield-Vette has developed a heat pipe bending tool to assist
design engineers for bending heat pipes at specific radius without
the risk of damaging the heat pipe itself. Simply select the
diameter of the heat pipe and utilize the tool to achieve your
ideal bend radius.
Note:
Heat Pipes sold separately.
WKV Part Number
HP-Tool-3MM
HP-Tool-4MM
HP-Tool-6MM
HP-Tool-8MM
DESCRIPTION
3mm Heat Pipe Bending Tool
4mm Heat Pipe Bending Tool
6mm Heat Pipe Bending Tool
8mm Heat Pipe Bending Tool
HP-Tool-3MM
HP-Tool-4MM
HP-Tool-6MM
HP-Tool-8MM
Heat Pipe Selection Guide
Wakefield Vette Standard Heat Pipes
Wakefield-Vette offers individual Heat Pipes through distribution. These most common offerings are a great option for
testing, sampling, and validating your heat pipe solution into eventual production.
When building or testing your heat sink assembly please feel free to contact one of Wakefield Vette’s authorized distributors
to
purchase. Always remember to contact us for free consultation on assembly design or parameter questions.
WKV PART
NUMBER
124641
124642
124643
124644
121686_rev1
121687_rev1
121688_rev1
124646
124647
124645
124650
124651
124652
124653
124654
124648
124649
124657
110578_rev1
110579_rev1
110580_rev1
110581_rev1
110582_rev1
124655
124656
124682
124662
110583_rev1
110584_rev1
110585_rev1
124658
124659
214660
124661
121689_rev1
124669
121690_rev1
121691_rev1
121692_rev1
124663
124664
124665
124666
124667
124668
124670
124671
124672
124673
124674
124675
214676
124677
124678
124679
124680
124681
120229
120231
121716_rev1
121717_rev1
121718_rev1
121719_rev1
121720_rev1
121721_rev1
121722_rev1
121723_rev1
121724_rev1
121725_rev1
121726_rev1
121727_rev1
121728_rev1
121729_rev1
DESCRIPTION
Heat Pipe Straight Sintered 3X70MM
Heat Pipe Straight Sintered 3X100MM
Heat Pipe Straight Sintered 3X150MM
Heat Pipe Straight Sintered 3X200MM
Straight Sintered 4mmx70mm
Straight Sintered 4mmx100mm
Straight Sintered 4mmx150mm
Heat Pipe Straight Sintered 4X200MM
Heat Pipe Straight Sintered 4X250MM
Heat Pipe Straight Sintered 4X300MM
Heat Pipe Straight Sintered 5X70MM
Heat Pipe Straight Sintered 5X100MM
Heat Pipe Straight Sintered 5X150MM
Heat Pipe Straight Sintered 5X200MM
Heat Pipe Straight Sintered 5X250MM
Heat Pipe Straight Sintered 5X300MM
Heat Pipe Straight Sintered 5X350MM
Heat Pipe Straight Sintered 6X70MM
Heat Pipe Straight Sintered 6x0.3x100mm
Heat Pipe Straight Sintered 6x0.3x150mm
Heat Pipe Straight Sintered 6x0.3x200mm
Heat Pipe Straight Sintered 6x0.3x250mm
Heat Pipe Straight Sintered 6x0.3x300mm
Heat Pipe Straight Sintered 6X350MM
Heat Pipe Straight Sintered 6X400MM
Heat Pipe Straight Sintered 8X70MM
Heat Pipe Straight Sintered 8X150MM
Heat Pipe Straight Sintered 8x0.3x200mm
Heat Pipe Straight Sintered 8x0.3x250mm
Heat Pipe Straight Sintered 8x0.3x300mm
Heat Pipe Straight Sintered 8X350MM
Heat Pipe Straight Sintered 8X400MM
Heat Pipe Straight Sintered 8X450MM
Heat Pipe Straight Sintered 8X500MM
Straight Sintered 10mmx100mm
Heat Pipe Straight Sintered 10X150MM
Straight Sintered 10mmx200mm
Straight Sintered 10mmx250mm
Straight Sintered 10mmx300mm
Heat Pipe Straight Sintered 10X350MM
Heat Pipe Straight Sintered 10X400MM
Heat Pipe Straight Sintered 10X450MM
Heat Pipe Straight Sintered 10X500MM
Heat Pipe Straight Sintered 10X550MM
Heat Pipe Straight Sintered 10X600MM
Heat Pipe Straight Sintered 12x70MM
Heat Pipe Straight Sintered 12x100MM
Heat Pipe Straight Sintered 12x150MM
Heat Pipe Straight Sintered 12x200MM
Heat Pipe Straight Sintered 12x250MM
Heat Pipe Straight Sintered 12x300MM
Heat Pipe Straight Sintered 12x350MM
Heat Pipe Straight Sintered 12x400MM
Heat Pipe Straight Sintered 12x450MM
Heat Pipe Straight Sintered 12x500MM
Heat Pipe Straight Sintered 12x550MM
Heat Pipe Straight Sintered 12x600MM
Straight Ultra thin 5mm dia x 100mm length; Flattened thickness 1.0mmm
Straight Ultra thin 6mm dia x 100mm length; Flattened thickness 1.5mm
Flat Heat Pipe 2.5 X 100mm
Flat Heat Pipe 2.5 X 150mm
Flat Heat Pipe 2.5 X 200mm
Flat Heat Pipe 2.5 X 250mm
Flat Heat Pipe 3.0 X 100mm
Flat Heat Pipe 3.0 X 1500mm
Flat Heat Pipe 3.0 X 200mm
Flat Heat Pipe 3.0 X 250mm
Flat Heat Pipe 3.0 X 300mm
Flat Heat Pipe 4.5 X 100mm
Flat Heat Pipe 4.5 X 150mm
Flat Heat Pipe 4.5 X 200mm
Flat Heat Pipe 4.5 X 250mm
Flat Heat Pipe 4.5 X 300mm
Type
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Round
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Flat
Length
(mm)
70
100
150
200
70
100
150
200
250
300
70
100
150
200
250
300
350
70
100
150
200
250
300
350
400
70
150
200
250
300
350
400
450
500
100
150
200
250
300
350
400
450
500
550
600
70
100
150
200
250
300
350
400
450
500
550
600
100
100
100
150
200
250
100
150
200
250
300
100
150
200
250
300
Diameter
(mm)
qMax
3
3
3
3
4
4
4
4
4
4
5
5
5
5
5
5
5
6
6
6
6
6
6
6
6
8
8
8
8
8
8
8
8
8
10
10
10
10
10
10
10
10
10
10
10
12
12
12
12
12
12
12
12
12
12
12
12
1
1.5
2.5
2.5
2.5
2.5
3
3
3
3
3
4.5
4.5
4.5
4.5
4.5
5W
8W
10W
5W
7W
15W
10W
10W
8W
5W
20W
32W
35W
30W
25W
15W
10W
35W
35W
60W
50W
40W
40W
25W
18W
45W
70W
50W
40W
55W
35W
25W
20W
15W
80W
120W
70W
65W
50W
60W
52W
45W
40W
35W
25W
50W
130W
150W
130W
115W
100W
75W
65W
55W
50W
42W
30W
12W
25W
35W
30W
25W
15W
45W
40W
35W
30W
25W
55W
55W
50W
45W
40W
Heat Pipe Design Guide
Heat pipes are used to transport heat over a distance with very
low thermal resistance. This is very helpful when small or distant
heat sources need to be dissipated over a larger area or moved to
a remote heat exchanger. Heat pipes are a Fluid Phase Change
application, often referred to as “re-circulating,” because they use
a closed loop to transfer heat quickly through evaporation and
condensation within the heat pipe.
Heat pipes do not actually dissipate the heat to the environment, but
serve to move heat efficiently within a thermal system. A heat pipe is
a copper tube with an internal wick structure that is sealed on both
ends with a small amount of water inside. As heat is applied to the
pipe, the water will boil and turn to a gas, which then travels to the
colder section of the heat pipe where it condenses back to a liquid.
It is the evaporating and condensing of the water that form a
pumping action to move the water (and thus the heat) from end to
end of the pipe.
Grooved Heat Pipe
There are many types of wick structure that can be used within the heat pipe
and they are generally classified into grooved, mesh, powder and hybrid. A
grooved heat pipe is a copper tube with a series of shallow grooves around the
internal perimeter of the heat pipe. While the water is a liquid, it travels in the
grooves and while it is a vapor it travels in the open space of the pipe. Grooved
pipes can be used in horizontal orientations, but are very limited in
performance if used above 15° out of horizontal. A mesh heat pipe is a smooth
wall copper tube with a woven copper mesh installed along the interior of the
pipe. The mesh is designed to remain in contact with the walls of the pipe in
areas where the pipe may be bent or flattened. Mesh pipes can be used in
horizontal and orientations up to 30° out of horizontal. A powder wick heat
pipe can also be known as a sintered heat pipe.
During the manufacturing process a mandrel is
installed in the center of the pipe and copper
powder is poured into the pipe around the mandrel.
After the powder is sufficiently packed, the parts are
placed into a sintering oven. Once at temperature,
the copper powder will stick to the pipe and to
itself, forming numerous internal pockets like a
sponge. Because of the small pocket sizes, sintered
pipes can efficiently move the water and can be
used horizontally, vertically and all points in
between including upside down. Wakefield-Vette
primarily sells sintered, or powder, style heat pipes
due to their higher performance and the best heat
pipe for your application.
Mesh Heat Pipe
Powder Wick Heat Pipe
www.wakefield-vette.com
Heat Pipe Selection Guide
Heat Pipe Introduction
Heat pipes are used to transport heat over a distance with very
low thermal resistance. This is very helpful when small or distant
heat sources need to be dissipated over a larger area or moved to
a remote heat exchanger. Heat pipes are a Fluid Phase Change
application, often referred to as “re-circulating,” because they use
a closed loop to transfer heat quickly through evaporation and
condensation within the heat pipe.
Heat pipes do not actually dissipate the heat to the environment, but
serve to move heat efficiently within a thermal system. A heat pipe is
a copper tube with an internal wick structure that is sealed on both
ends with a small amount of water inside. As heat is applied to the
pipe, the water will boil and turn to a gas, which then travels to the
colder section of the heat pipe where it condenses back to a liquid.
It is the evaporating and condensing of the water that form a
pumping action to move the water (and thus the heat) from end to
end of the pipe.
There are many types of wick structure that can be used within the heat pipe
and they are generally classified into grooved, mesh, powder and hybrid. A
grooved heat pipe is a copper tube with a series of shallow grooves around the
internal perimeter of the heat pipe. While the water is a liquid, it travels in the
grooves and while it is a vapor it travels in the open space of the pipe. Grooved
pipes can be used in horizontal orientations, but are very limited in
performance if used above 15° out of horizontal. A mesh heat pipe is a smooth
wall copper tube with a woven copper mesh installed along the interior of the
pipe. The mesh is designed to remain in contact with the walls of the pipe in
areas where the pipe may be bent or flattened. Mesh pipes can be used in
horizontal and orientations up to 30° out of horizontal. A powder wick heat
pipe can also be known as a sintered heat pipe.
During the manufacturing process a mandrel is
installed in the center of the pipe and copper
powder is poured into the pipe around the mandrel.
After the powder is sufficiently packed, the parts are
placed into a sintering oven. Once at temperature,
the copper powder will stick to the pipe and to
itself, forming numerous internal pockets like a
sponge. Because of the small pocket sizes, sintered
pipes can efficiently move the water and can be
used horizontally, vertically and all points in
between including upside down. Wakefield-Vette
primarily sells sintered, or powder, style heat pipes
due to their higher performance and the best heat
pipe for your application.
Grooved Heat Pipe
Mesh Heat Pipe
Powder Wick Heat Pipe
www.wakefield-vette.com
Heat Pipe Selection Guide
Why Use Heat Pipes?
Heat pipes are used in many harsh environments such as:
Key Features
•
Material: Copper
•
Wick Structure: Powder Sintered Copper
•
Light Weight
•
Versatile with high thermal performance
•
•
•
•
Telecommunications
Aerospace
Transportation
Computers and Datacenters
Heat pipes have proven to be robust and reliable over many
years in these types of applications. The next section will give
more technical detail on the performance of heat pipes
depending on diameter, length, and angle of use.
Many thermal systems benefit from the addition of heat pipes, especially when heat sources are dense
and/or remote to the final heat exchanger. Computer applications, such as processors, graphics cards and
other chip-sets, have high thermally dissipated power in a small area. Fan heat sink combinations used in
these applications can offer high-performance dissipation to the ambient, but much of the battle is to bring
the heat to the heat exchanger with as little temperature change as possible. Heat pipes excel at this and
can transport large heat loads from small areas with very little temperature difference.
How Heat Pipes Operate
Heat Source
1.
2.
3.
4.
5.
6.
Working fluid absorbs heat while evaporating to vapor
Vapor transfers along the cavity to the lower temperature area
Vapor condenses back to fluid, discharging heat
Fluid is absorbed by the sintered/powdered wick structure
Fluid returns to high temperature end via capillary force in the wick structure
Natural or forced convection air flow dissipates excess heat to ambient
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