Development of a Thermoelectric Generator-Powered Solid-State 100-Watt Beacon System

摘要

A solid-state 100-watt navigational beacon power system employing a propane-fired, 30-watt, thermoelectric power supply, a capacitor energy storage bank; and a 5-second, one-quarter duty cycle, solid-state flasher has been developed for possible replacement of present Coast Guard battery-powered systems using mechanical flashers. System development began with determining the electrical characteristics and performance of the thermoelectric power supply in severe ocean environments. The power supply was modified to increase its reliability and wind resistance. The system meets the environmental and reliability specifications required for buoy operation. The MEL thermoelectric generator-powered beacon system is technically and economically superior to battery-powered, mechanically flashed systems, and the many advantages of solid-state apparatus should be exploited for Coast Guard use. A cost comparison was made with an advanced power system using air depolarized batteries and a sun switch to extend the buoy service period to the same 1-year service period required to refuel the thermoelectric generator. The comparison showed that the estimated 10-year procurement costs of $12,200 for the battery system could be reduced to only $1,600 by use of the MEL thermoelectric generator-powered system. (Author)