Datasheet

Copper-Water Heat Pipes
Copper-Water Heat Pipes
Transport heat quickly, reliably, and effectively with CopperWater Heat Pipes designed and fabricated by Boyd. CopperWater Heat Pipes are a popular component in a wide varietyof thermal management solutions across broad range ofindustries because of the high heat capacity of two-phasewater cooling in a versatile copper package.
Boyd has pioneered heat pipe development and solutions
over the last 50 years, setting the world standard forcommercial application of this passive, highly conductive
two-phase heat transfer device. Boyd heat pipes are designed
for high heat load or gravity sensitive applications wherereliability and long life are critical.
Copper-Water Heat Pipes are often integrated into thermal
management assemblies to improve effective conductivity
and efficiency, improving overall system performance. By
using epoxy, solder, or a mechanical interference fit, Boyd’s
Copper-Water Heat Pipes can be integrated into othercomponents to fabricate heat transport or heat spreadingassemblies that are more customized to your specificapplication.

Using water as the internal working fluid, Boyd Copper-Water Heat Pipe moves heat from the heat source to where the heat canbe managed more effectively through dissipation to air, liquid, or radiated to space. Ductile copper walls and sintered powder
wick enable bending or flattening to meet an application’s thermal and geometric requirements. This can be used to reduceoverall height, increase surface contact, or route heat pipes around keep-out areas like mounting hardware. Thermal architects
have more flexibility because embedded heat pipes don’t require changing the geometry of the heat sink, which is especially
useful in retrofit or increasing the power of existing products.
Tightly controlled manufacturing processes backed by product field experience ensure our integrated heat pipe assemblies canlast well over 20 years. Today, Boyd has one of the world’s largest collection of heat pipes on life test. With more than 200 heat
pipes using various material systems and working fluids on continuous life and reliability testing, Boyd has gathered more than
40 years of life test data (>350,000 hours).

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Copper Water Heat Pipes

Ordering Information
Contact your Boyd representative for more information on custom heat pipe solutions or heat pipe assemblies or contact us atwww.boydcorp.com.
Boyd offers a wide range of high performance two-phase heat transport and thermal management solutions.

Features and Benefits
Features and Benefits
Passive components with no moving parts means longer life and reliability
Withstand numerous freeze-thaw cycles and temperatures ranging from -55°C to 180°C
Commercially proven technology ensures versatile, cost effective, and reliable heat transport or spreading that last decades
Copper enables design flexibility with bending and flattening options
Water working fluid covers most commercial operating temperatures with high heat transport capacity
Easily combined with other technologies for complete thermal management solutions

Mechanical and Perfromance
Dimensions are in mm, Qmax in W

Round Heat Pipes: 3 - 6 mm Diameter
Part NumberDiameter

LengthWall Thickness

Typical Qmax*

HP-CWS-R03-075-N

375

Thin

35

HP-CWS-R03-100-N

3100

Thin

24

HP-CWS-R03-150-N

3150

Thin

17

HP-CWS-R03-200-N

3200

Thin

13

HP-CWS-R03-250-N

3250

Thin

10

HP-CWS-R03-300-N

3300

Thin

8HP-CWS-R04-085-N

485Thin

91HP-CWS-R04-100-N

4100

Thin

65

HP-CWS-R04-149-N

4149

Thin

43

HP-CWS-R04-207-N

4203

Thin

32

HP-CWS-R04-260-N

4260

Thin

26

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Round Heat Pipes: 3 - 6 mm Diameter continued...
Part Number

Diameter

LengthWall Thickness

Typical Qmax*

HP-CWS-R04-302-N

4302

Thin

28

HP-CWS-R05-097-N

597

Thin

100

HP-CWS-R05-150-N

5150

Thin

72

HP-CWS-R05-200-N

5200

Thin

52

HP-CWS-R05-258-N

5258

Thin

42

HP-CWS-R05-300-N

5300

Thin

35

HP-CWS-R05-350-N

5350

Thin29HP-CWS-R06-100-N

6100Thin137

HP-CWS-R06-150-N

6150

Thin

91

HP-CWS-R06-200-N

6200Thin69

HP-CWS-R06-250-N

6250

Thin

55

HP-CWS-R06-310-N

6310Thin47

HP-CWS-R06-350-N

6350

Thin

40

* See Performance Notes below for more information on Qmax

Round Heat Pipes: 8 and 10 mm Diameter
Part Number

Diameter

LengthWall Thickness

Typical Qmax*

HP-CWS-R08-100-N

8100

Thin

199

HP-CWS-R08-155-N

8155

Thin

135

HP-CWS-R08-200-N

8200

Thin

99

HP-CWS-R08-250-N

8250Thin80

HP-CWS-R08-300-N

8300

Thin

49

HP-CWS-R08-360-N

8350

Thin

67

HP-CWS-R10-101-K

10101

Thick

254

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Copper Water Heat Pipes

Mechanical and Perfromance
Dimensions are in mm, Qmax in W

Round Heat Pipes: 8 and 10 mm Diameter continued...
Part Number

Diameter

LengthWall Thickness

Typical Qmax*

HP-CWS-R10-156-K

10156

Thick

170

HP-CWS-R10-216-K

10216

Thick

127

HP-CWS-R10-266-K

10266

Thick

103

HP-CWS-R10-321-K

10321

Thick

85

HP-CWS-R10-346-K

10346

Thick

72

Flat Heat Pipes: 5 - 10 mm Width
Part Number

Diameter

LengthFlat Width

Flat HeightWall Thickness

Typical Qmax*

HP-CWS-F04x25-100-N

4100

52.5Thin

35

HP-CWS-F04x25-150-N

4150

52.5Thin24

HP-CWS-F05x35-100-N

5100

63.5Thin46

HP-CWS-F05x35-150-N

5150

63.5Thin

33

HP-CWS-F05x20-075-N

575

72Thin55

HP-CWS-F05x20-100-N

5100

72Thin40

HP-CWS-F05x20-150-N

5150

72Thin27

HP-CWS-F05x20-200-N

5200

72Thin21

HP-CWS-F06x28-075-N

675

82.8Thin81

HP-CWS-F06x28-100-N

6100

82.8Thin57

HP-CWS-F06x28-150-N

615082.8Thin

36

HP-CWS-F06x28-200-N

620082.8Thin

31

HP-CWS-F08x47-075-N

875

104.7

Thin

52

HP-CWS-F08x47-100-N

8100104.7

Thin

50

HP-CWS-F08x47-150-N

8150

104.7Thin

54

HP-CWS-F08x47-200-N

8200

104.7

Thin

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Copper Water Heat Pipes

Performance Notes
Typical Qmax Values:

Heat Pipe performance is highly dependent upon application
configuration and operating conditions. The amount ofheat a single Heat Pipe can move, Qmax, is a function of bothheat pipe design and environmental conditions. Adiabatic
temperature, effective heat pipe length, bends, flattened
regions, and gravity inclination all affect the Qmax of a heatpipe.

Simulating Qmax Dry Out Calculations in Your
Application:
Boyd Copper-Water Heat Pipes are easily modeled in Boyd
SmartCFD, whose heat pipe modeling algorithms are derived
from decades of empirical heat pipe performance data. Boyd
SmartCFD modeling not only calculates Qmax, the point ofheat pipe dry out, but partial dry out conditions. This enables
thermal engineers to accommodate safety margins anddifficult use cases that work against gravity or experience
multiple gravity orientations.

Qmax values shown in the tables above are assuming typical
sized evaporator and condenser regions in a gravity aided
orientation under common operating temperatures. Boydhighly recommends testing or simulating your heat pipe
assembly in your specific application prior to production.
General Tips to Achieve Peak Heat Pipe Performance:• Place Evaporator Below Condenser in Relation to Gravity• Use in Warmer Ambient Temperatures• Use Largest Diameter Heat Pipes Possible in SpaceConstraints• Ensure Good Thermal Contact between Heat Pipe and HeatSources• Limit Heat Pipe Flattening and Bending to Critical Regions

Customization Options
With our decades of experience and expertise, Boyd cancustomize your heat pipe solution to meet application-specificrequirements to withstand difficult environments andoperating condition.
Some Customization Options Include:• Geometry: Diameter, Length, Wall Thickness, Bends,Flattening• Wick Structure: Sintered Powder, Mesh, Axially Grooved• Heat Pipe Casing Materials• Working Fluids

Contact your Boyd representative for more information about
Boyd SmartCFD.
Wall Thickness:
Thinner Heat Pipe Walls (below 0.6mm) enable easier bending
and flattening for creating your Heat Pipe Assembly. Thickwalled Heat Pipes will take more effort to bend or flatten but
are more robust and better suited for rugged applications.
Thicker walls are also a safer option when the Heat Pipe
Assembly will be subject to machining as it will be less likely topuncture the sealed Heat Pipe Wall.

Related Technologies
Boyd’s expertise extends to more advanced Two-Phase
Technologies such as:• Ultra-Thin Vapor Chambers• Loop Heat Pipes• High Temperature Heat Pipes• Cryogenic Heat Pipes• Isothermal Furnace Liners
Contact your Boyd representative for more information
about finding the best fit technology and solution for yourapplication.

Boyd is the world leader in integrating technologies intocomplex, multifunctional assemblies, including Heat Transport
Heat Pipe Assemblies and Embedded Heat Pipe Assemblies.
Common components and technologies used with CopperWater Heat5|

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