COMPOSITE POWER GENERATION SYSTEM, AND CONTROLLER, METHOD, AND PROGRAM FOR THE SAME

• Main Authors: OSAWA HIROYUKI, NAGAI TAKUMA
• Format: Patent
• Language: English; Japanese
• Published: 23.05.2016
• 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 POSITIVE-DISPLACEMENT ENGINEPLANTS; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NOT OTHERWISE PROVIDED FOR; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; STEAM ACCUMULATORS; STEAM ENGINE PLANTS; STEAM ENGINES; USE OF WASTE HEAT OF COMBUSTION ENGINES; WEAPONS

PROBLEM TO BE SOLVED: To control a composite power generation system while suppressing equipment cost and a running cost.SOLUTION: A composite power generation system comprises: an exhaust fuel gas line 27a through which an exhaust fuel gas is sent from an SOFC 10 by using an exhaust fuel blower 29; an exhaust fuel gas supply line 27c that branches from a branch point of the exhaust fuel gas line 27a to supply the exhaust fuel gas to a MGT 50; a re-circulation line 27b that branches from a branch point to circulate the exhaust fuel gas to the SOFC 10; a shutoff valve 31 of a vent line 28 branching from the upstream side from the branch point; an orifice 32 on the downstream side from the shutoff valve 31; a water supply part 24 for supplying water to the re-circulation line 27b; and a DPX 18 for measuring system differential pressure of the SOFC 10. In the case of stopping power generation of the SOFC 10 or in the case that the power generation of the SOFC 10 abnormally stops, the shutoff valve 31 is made to be in an open state while the orifice 32 applying a predetermined pressure loss to the vent line 28 to control a water flow rate of the water supply part 24 so that a differential pressure measured by the DPX 18 becomes a predetermined value.SELECTED DRAWING: Figure 1 【課題】設備コスト及びランニングコストを抑えて複合発電システムの制御すること。【解決手段】ＳＯＦＣ１０から排燃料ガスを排燃料ブロワ２９により送気する排燃料ガスライン２７ａと、排燃料ガスライン２７ａの分岐点より分岐してＭＧＴ５０に排燃料ガスを供給する排燃料ガス供給ライン２７ｃと、分岐点より分岐してＳＯＦＣ１０に排燃料ガスを流通させる再循環ライン２７ｂと、分岐点より上流側から分岐するベントライン２８の遮断弁３１と、遮断弁３１より下流側のオリフィス３２と、再循環ライン２８ｂに水を供給する水供給部２４と、ＳＯＦＣ１０の系統差圧を計測するＤＰＸ１８とを具備し、ＳＯＦＣ１０の発電を停止する場合またはＳＯＦＣ１０の発電が異常停止する場合に、ベントライン２８にオリフィス３２で所定の圧力損失を与えながら、遮断弁３１を開状態とし、ＤＰＸ１８で計測する差圧が所定値になるよう水供給部２４の水流量を制御する。【選択図】図１