calculation · Water Fuel Cell · computed
WFC design session v19: best candidate (Q=101.2, 99.4kHz)
Sweep: Actually reach temperature floor near 0-1°C at fixed #1 geometry, and sweep surface_factor down from 0.25 to test if reduced Cdl area breaks the 900mA current floor
Cell: 15.9mm rod in 25.5mm tube × 127mm, 1 cell(s) parallel → C_eff = 1.29nF, bulk water R = 137985Ω. Water/electrodes (Randles): 0.1ppm Na+ @ 3°C, surface ×0.25 → λ_D 227nm, C_dl 3.3µF, cell series R 11.1Ω, displacement current 99.1%, breakdown margin ×264. Chokes: 2 × 0.00099H (129 turns, AWG 18, 15m wire, AC R 0.6Ω each). At resonance f_r = 99.41kHz: Xl = 1237Ω, Xc = 1237Ω, tank Q = 101.2, coil Q = 1090.3. Cell voltage 1215V from 12V drive (×101.2), series current 982.1mA. All constraints satisfied (current <1A, band, wire length). Score 0.840.
Basis
- Confidence
- 0.70
- Method
- townsend-v5
- Recorded
- Published
- 30 Aug 2026
- Device
- Water Fuel Cell
- Component
- cell
- Source Ref
- design session v19
- Notebook Id
- 1364
design-loop Q resonance