Space Qualified Axially Grooved Aluminium Ammonia Heat Pipe
Technical Specifications
Envelope Material
Aluminium Alloy AA 6063-T6
End Caps
Aluminium Alloy AA 6061
End Covers
Aluminium Alloy AA 6082 / HE30
Wicking System
Axial grooves (Extruded Type)
Welding Technique
Tungsten Inert Gas (TIG) welding
Ammonia Purity
99.99995%
Ethane Purity
99.99995%
Shapes
Straight, Single bend, Multi-bend (up to 180°)
Type
Axially grooved constant conductance heat pipes
Proof Pressure
≥ 1.25 × MEOP
Burst Pressure
≥ 1.5 × MEOP
Fluid Leak Rate
≤ 1×10⁻⁸ std.cm³/s (envelope)
≤ 1×10⁻⁶ std.cm³/s (dual channels)
≤ 1×10⁻⁶ std.cm³/s (dual channels)
Types & Dimensions
| Parameter | Type A1 | Type A2 | Type A3 |
|---|---|---|---|
| Channels | Dual Channel | Dual Channel | Single Channel |
| Cross Section | 25.4 × 12.8 mm | 25.4 × 12.8 mm | 12.8 × 12.8 mm |
| Ammonia Charging | ≤ 14.03 g/m per channel | ≤ 14.98 g/m per channel | ≤ 14.44 g/m |
| Total Heat Transport | 240 W/m | 240 W/m | 120 W/m |
Performance (All Types)
Length
200 mm to 3000 mm
Flatness
0.2 mm
Roughness
0.8 Ra µm
Straightness
0.5 mm / 1000 mm
Parallelism
0.2 mm / 1000 mm
Working Fluid
Ammonia or Ethane
Ammonia Heat Transport
≥ 120 W/m per channel @ 60 °C
Ammonia Operating Temperature
–40 °C to +60 °C
Ammonia Non-Operating Temperature
–60 °C to +127 °C
Helium Leak Rate
≤ 1×10⁻⁸ std.cm³/s (welded joints)
≤ 1×10⁻⁸ std.cm³/s (dual channels)
≤ 1×10⁻⁸ std.cm³/s (dual channels)
Ammonia Axial ΔT
≤ 5 °C for I/O flux of 2 W/cm² @ 60 °C
Customisations available upon request.
