How heat leaves an orbital data center without a fin farm.

Torus-Cool loads waste heat into ferrofluid, fires it as a helical droplet sheet, and lets each droplet radiate to space. A magnetic throat recaptures the cooled fluid. Four shots. One closed loop.

01 · Orbit

Closed loop. No solid fins.

A modular magnetic ring on a LEO habitat replaces the micrometeoroid-pocked fin farm. Heat leaves as radiation from a ferrofluid droplet sheet.

Live schematic · drag to orbit

01 Orbit

The loop

Four stations. Continuous flow.

Select a station to jump the film and the schematic. Droplets leave hot, glow down as they radiate, and return cold.

Why a helix

A linear sheet shadows itself. A twist does not.

NASA liquid-droplet radiators flew the idea of discarding solid panels. Torus-Cool adds magnetic focusing and a helical sheet so more of each droplet sees 3 K space on the way around the ring.

Standard linear sheet

Lower radiating area. Downstream droplets sit in the shadow of the ones ahead.

Helical sheet — this design

Higher radiating area. The twist opens each droplet to cold space instead of its neighbors.

Against the fin farm

Mass is the radiator.

Conventional deployable radiators carry metal, plumbing, and micrometeoroid armor for a surface that still gets punctured. A droplet sheet has no armor to puncture — and the hardware that stays on the hull is a compact ring plus a collector.

Architecture: Closed-loop ferrofluid droplets
Guide field: Toroidal magnetic ring
Injection: Piezoelectric orifice array
Collection: Flared magnetic recapture throat
Target specific mass: ~1.2 kg/kW
Deployable fins (SOTA): 8–15 kg/kW

Labeled modular orbital heat-rejection device on a LEO habitat, with magnetic guide ring, helical ferrofluid sheet, injector, and recapture throat.