DESIGN CONSIDERATIONS FOR ENERGY-EFFICIENT SAFETY MONITORING DEVICES POWERED BY RENEWABLE ENERGY

Abstract

Safety-critical wireless sensors in oil & gas facilities and transportation tunnels have relied on primary batteries lasting 2–6 years, incurring high maintenance costs and risks in inaccessible locations. This paper reviews the breakthrough to perpetual operation via ambient energy harvesting and ultra-low-power design. Two field-proven systems are examined: solar-powered multi-gas detectors deployed >28 months in the Permian Basin and North Sea platforms, yielding daily energy surpluses of 16.9–55.2 Wh against 4.2–7.2 Wh consumption; and hybrid solar-thermoelectric fire-monitoring nodes operating 14–18 months in zero-light tunnels with 5.6–10.5Wh net surplus and 100 % data availability under SIL-2 constraints. These deployments eliminate battery replacement, cut operational costs by >82 %, and achieve indefinite lifetime. Remaining gaps in fully enclosed environments, long-term reliability, certification, and cybersecurity are identified.