FUEL CELL SYSTEM AND CONTROL METHOD THEREOF, AND POWER GENERATING SYSTEM AND CONTROL METHOD THEREOF

• Main Authors: TAKAMURA NAOKI, OSAWA HIROYUKI, IRIE HIROKI, NAGAI TAKUMA
• Format: Patent
• Language: English; Japanese
• Published: 24.12.2020
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BASIC ELECTRIC ELEMENTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ELECTRICITY; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; STEAM ACCUMULATORS; STEAM ENGINE PLANTS; STEAM ENGINES; WEAPONS

To control differential pressure between the fuel electrode side and the air electrode side, without requiring manpower.SOLUTION: A fuel cell system 16 includes a fuel cell 13 generating electricity when oxidizing gas is supplied to an air electrode 113 and fuel gas is supplied to a fuel electrode 109, a differential pressure gauge 90 for measuring differential pressure of the air electrode 113 and the fuel electrode 109, a first vent valve 46 for exhausting air from the fuel electrode 109 to the outside of the system, a speed controller for adjusting valve opening speed for bringing the first vent valve 46 from closed state to open state, when controlling the first vent valve 46 from a closed state to an open state, and a control arrangement 58 for controlling the first vent valve 46, exhausting air from the fuel electrode 109 to the outside of the system, from closed state to open state by using the speed controller when a determination is made that the differential pressure goes above a first prescribed differential pressure value, over a prescribed time, and when the differential pressure goes below a second prescribed differential pressure value smaller than the first prescribed differential pressure value, for controlling the first vent valve 46 from the open state to the closed state.SELECTED DRAWING: Figure 4 【課題】人手を要することなく、燃料極側と空気極側の差圧を制御すること。【解決手段】燃料電池システム１６は、空気極１１３に酸化性ガスが供給されるとともに燃料極１０９に燃料ガスが供給されることにより発電を行う燃料電池１３と、空気極１１３と燃料極１０９との差圧を計測する差圧計９０と、燃料極１０９から系外へ排気させる第１ベント弁４６と、第１ベント弁４６を閉状態から開状態に制御する場合に、第１ベント弁４６を閉状態から開状態にさせる弁開度速度を調整するスピードコントローラと、差圧が、第１所定差圧値以上であると判定した場合に、スピードコントローラを用いて、燃料極１０９から系外へ排気させる第１ベント弁４６を所定時間かけて閉状態から開状態に制御し、差圧が、第１所定差圧値より小さい第２所定差圧値以下になった場合に、該第１ベント弁４６を開状態から閉状態に制御する制御装置５８とを具備する。【選択図】図４