calculation · Electrical Particle Generator · computed

EPG design session v4: best candidate (η=59.6%, 231.3W)

Sweep — Separate hydraulic cost from induced EMF via velocity sweep, push modulation depth at lower copper via pitch-vs-coil-length, and evaluate at the matched ~40Ω load instead of 100Ω.

Score 0.965 — η 59.6%, 231.34 W net

Pathway — bore 80.0mm, loop 1000mm, spiral pitch 60mm
Coil array — 5 × 2400 turns AWG18, 8mm long (3167m wire, 66.28Ω)
Medium — slurry, φ=25.0%, remanence 65% → M 61.8 kA/m, B 583 G
Flow — 1.00 m/s (3.3 fps), Re 1829 laminar, ΔP 424 Pa
Modulation — depth 0.971 — coil/pitch 0.13
Output — 252.91 V into 100.0Ω at 16.7 Hz (matched load would be 66.28Ω)

Energy budget

electrical gross   384.666 W
− coil I²R         153.329 W
= net to load      231.337 W
hydraulic input    3.550 W
eddy (tube wall)   6.05e-7 W
mechanical input   388.216 W  (hydraulics + Lenz reaction + eddy)
η = 59.59%

Basis

Confidence: 0.70
Method: epg-faraday-v1
Recorded: 24 Aug 2026
Published: 30 Aug 2026
Device: Electrical Particle Generator
Component: pickup-coil
Source Ref: design session v4
Notebook Id: 1658

design-loop epg efficiency