ALVC NORDLOOP: Passive Loop Thermosyphon for Off-Highway Power Electronics (700 W, -25 K)

From 72 °C down to 47 °C (-25 K) under 700 W full load inside the power electronics bay of a heavy electric Off-Highway excavator — with zero pumps and zero coolant hoses: With ALVC NORDLOOP, ALVC Europe GmbH demonstrates how a hermetically sealed 180° aluminum Loop Thermosyphon cools two 350 W power modules (IGBT / SiC) purely passively.

Heavy construction and mining machinery exposes conventional active liquid cooling loops to severe field failure risks. Abrasive quarry dust, mechanical shock loads, continuous vibration, and tight hydraulic and inverter compartments turn circulation pumps, elastomer hoses, and quick-disconnect couplings into primary maintenance liabilities.

Steady-State Thermal Benchmark (700 W / -25 K) & Two-Phase Principle

• Total Heat Dissipation: 700 W thermal load across 2× 350 W IGBT or SiC power modules mounted on a shared evaporator rail.
• Full-Load Temperature Reduction (-25 K): 47 °C steady-state module temperature with ALVC NORDLOOP and forced air convection versus 72 °C in the uncooled baseline.
• Passive 180° Phase-Change Cycle: Thin-film evaporation at the CNC-milled module mounting interface, low-pressure-drop vapor transport around the 180° bend, condensation along the finned heat exchanger leg, and capillary condensate return along internal micro-grooves.
• Hermetic Solid-State Joining: Extruded multi-channel aluminum profile permanently sealed via solid-state Friction Stir Welding and 100% inline helium leak tested.
• Field-Ready Maintenance-Free Subassembly (0 W): 0 W parasitic pump power, 0 hoses, 0 quick-disconnect couplings, 0 glycol service, and 0 leak risk across the machine lifetime.

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Packaging Around Tight Inverter Bay Corners & Custom 3D STEP Integration

Decoupling the evaporator mounting face from the finned condenser leg across a 180° bend routes heat cleanly out of the dust-sealed inverter enclosure into an external cooling air duct. Engineers can evaluate their own thermal boundary conditions or 3D STEP envelopes directly in the ALVC Co-Engineering Studio or send them to our engineering team in Stuttgart (service@alvceurope.com) for DFM review, functional prototyping, and serial production.

System Architecture & Engineering Specifications: Explore Loop Thermosyphon Cooling Systems →