An outdoor photoreaction system is three subsystems stitched together: optics that accept whatever the sky delivers, thermal management that copes with ambient swings, and a circulation loop that moves the working fluid through the illuminated zone. Each is simple; the integration is the engineering.
Orientation and tilt set annual energy capture, fixed tilts at the site latitude are the simplest robust choice, trackers add capture but add maintenance. Soiling matters more than people expect, design covers for cleanability and include cleaning in the operating schedule, a dirty panel underperforms a clean one by double-digit percentages.
Ambient heats and cools the reactor on its own schedule: midday liquid temperatures can far exceed ambient, nights drop below. Decide the target regime, thermal assist wants retention (insulation, dark backing), temperature-sensitive chemistry wants stability (heat exchange, shading) and instrument the decision with real temperature logging at the plate.
Pumps sized for the plate's flow requirements; lines that survive weather and draining for winter; flow verification at the plate, not just at the pump; and a reservoir that manages volume changes across the day. Filtration or catalyst retention belongs in the loop design, not bolted on after the first loss event.
Mount structures rated for wind loads; electrical and instrumentation cabling protected from UV and water; safe access for sampling and maintenance; and a data chain from the first day. Outdoor systems succeed in the details that laboratory rigs never test.
See Perfectlight's outdoor systems and engineering solutions for complete configurations.
