XP-C01
Instrumented prototype
A table-sized rig cannot honestly run 500 °C. Phase A exists to prove the instruments can see a 5% error — not to brag about a coating.
Phase A design point
DNI 900 W/m² · ηopt 0.70 · black cavity at 100 °C
2.0 m²
Collector
Four 1.0 × 0.50 m facets
25×
Cg
Aperture 400 × 200 mm
1.80 ± 0.04 kW
Incident
1.12 ± 0.02 kW
Useful heat
ηth 62%
Why temperature is gated
| Receiver T | Useful heat | ηth | Verdict |
|---|---|---|---|
| 80 °C | 1.18 kW | 66% | Phase A |
| 120 °C | 1.12 kW | 62% | Phase A |
| 250 °C | 793 W | 44% | Phase B only |
| 390 °C | 171 W | 9% | Do not bother |
| 500 °C | -624 W | -35% | Forbidden |
0-D black-cavity model, ε = 0.95, h = 10 W/m²K, Aap = 0.08 m². It exists to kill bad temperatures early. Phase B grows collector area to 8 m² and Cg to 50 before any Class M claim.
Instrumentation
- I1PyrheliometerIncident solar power
- I2Flux mapReceiver-plane distribution
- I3Thermocouples + pyrometerCavity and surface temperature
- I4Flow + ΔTUseful thermal power, ~1.6 L/min water for 10 K at 1.1 kW
- I5Ambient / windConvective boundary
- I6Electrical loadNot installed in Phase A