3D Printed Pipe Embeds Heater And Sensor For Space

Why It Matters

Integrating heating and sensing directly into structural pipes cuts assembly time, reduces part count, and improves thermal‑loop reliability, a critical advantage for next‑generation satellite platforms.

Key Takeaways

• Integrated heater and sensor printed in 316L stainless steel
• Heater delivers 60 W, reaches setpoint in three minutes
• RTD accuracy fell short, requiring COTS sensors
• Burst pressure reached 1,225 bar, exceeding requirements
• Aluminum variant cuts mass by 2.5×

Pulse Analysis

Additive manufacturing is reshaping spacecraft thermal‑control architecture by allowing functional elements to be built directly into structural parts. The European team’s 150 mm pipe, printed in 316L stainless steel with laser powder‑bed fusion, integrates a resistive heater, internal wiring, and a D‑sub connector, eliminating the need for separate Kapton films and fragile leads. This design‑for‑additive‑manufacturing (DfAM) approach reduces assembly time, lowers part count, and improves heat transfer around bends, addressing a key bottleneck in mechanically pumped loop (MPL) integration for high‑power telecom satellites.

Test data confirmed the mechanical robustness of the printed pipe: porosity stayed below 0.02 %, tensile strength exceeded 600 MPa, and burst pressure reached 1,225 bar. The embedded heater met its 60 W target and stabilized fluid temperature within three minutes in single‑phase flow, while two‑phase tests showed negligible pressure drop. However, the aerosol‑jet‑printed RTD failed to achieve the required 1 kΩ resistance and temperature accuracy, prompting the team to recommend space‑qualified COTS sensors for future flights. The mixed metrology highlights the need for tighter process control when embedding delicate electronics.

The project’s next steps focus on mass‑optimized aluminum variants, which have already demonstrated a 2.5‑fold weight reduction without sacrificing heater performance. If the insulation aging and ammonia compatibility issues are resolved, fully instrumented evaporators could be printed directly into satellite panels, delivering further AIT savings and design flexibility. For the satellite industry, such integrated thermal components promise lower launch mass, faster production cycles, and more reliable thermal loops, positioning additive manufacturing as a strategic technology in the race for higher‑throughput, lower‑cost space missions.