Figure 3

Characterization of power generating performance of fabricated glass filters. (a) Setup for characterization of the glass filters. Water is introduced into the generator by the water delivery system and it is circulated using check valves. Measured voltage is recorded by a PC through an I/O board. (b) Photo of the generator equipped with the glass filter and electrodes. (c) Photo of the water delivery system. (d) Voltage time-course of the repetitive power generation using the filter sintered at 700 °C and 5 min glass powder milling time. The water delivery system speed was 20 mm/s. (e) Voltage time-courses using the porous glass filters sintered at the temperature indicated at the top of each graph. Each graph shows voltage during 3 pressing cycles at water delivery system speeds of 4, 6, 8, 10, 20, 30, 40 and 50 mm/s. (f) Voltage, current and estimated power of the generators versus sintering temperature of the glass filters at the water delivery system speed of 50 mm/s. Voltage and current plots represent average ± S.D. (n = 3). (g) Voltage time-courses using the porous glass filters sintered at 700 °C with average pore radius indicated at the top of each graph. Water delivery conditions were the same as in (e). (h) Voltage, current and estimated power of the generators versus average pore radius. Voltage and current plots represent average ± S.D. (n = 3).