Blueprint: Village Plasma Nitrogen Fixation Unit (Solar-Powered Gliding Arc) — Build Specification

Build specification for a village-scale gliding-arc plasma nitrogen fixation unit on a 10 kWp solar array, drawn from the source paper (DOI 10.5281/zenodo.24108494). SIMULATED, NOT MEASURED — NOT BUILT. The unit captures 0.433 kg of nitrogen per day (129.9 kg per year) as nitrate in water at 98.17 kWh per kg captured and a levelised cost of USD 13.00 per kg of nitrogen — 6.3 times remote delivered urea at USD 2.065 per kg. Break-even would require a discharge energy cost of 0.572 MJ per mol, which no atmospheric-pressure gliding arc has reported. The blueprint carries the full build specification (bill of materials at component-class level, process flow, assembly procedure, sizing rules, commissioning and acceptance tests, operating limits and failure modes) and the economics verdict at full size: it should not be built as a substitute for delivered fertiliser on price grounds; its defensible case is certainty of supply for small, critical areas. The gliding arc beats a dielectric barrier discharge by 17.8 times on energy per kg captured; the dielectric barrier discharge is rejected.