FLOW RATE CONTROL SYSTEM AND COMBUSTION CONTROL SYSTEM HAVING THE SAME

To achieve manpower saving by the automization of a variety of adjustments such as a flow rate while improving profitability by maintaining a simple constitution which does not need to install an electronic flowmeter.SOLUTION: In on-site facilities 100, 200 having flow rate control valves RVg, RVa, secondary-side fuel pressure adjustment mechanisms GV, BVa, and a primary-side pressure adjustment mechanisms GA, B provided on on-site piping H1, H2, the pressure of a secondary-side outlet is set to prescribed initial set secondary pressure by the secondary-side fuel pressure adjustment mechanisms GV, BVa in a state that the flow rate control valves RVg, RVa are maintained in prescribed initial set openings in a state that control-objective gases G, A are made to circulate in the on-site piping H1, H2, and after that, in a state that the pressure of a primary-side inlet is maintained at prescribed flow rate control pressure by the primary-side pressure adjustment mechanisms GA, B, a flow rate control part S1 controls flow rates of the control-objective gases to target flow rates by controlling openings of the flow rate control valves RVg, RVa on the basis of an opening flow rate relation which is stored in a storage part S3.SELECTED DRAWING: Figure 1 【課題】電子流量計を設けることのない簡易な構成を維持して経済性を向上しつつ、流量等の各種調整の自動化による省人化を実現する。【解決手段】現場配管Ｈ１、Ｈ２に流量制御弁ＲＶｇ、ＲＶａと二次側燃料圧力調整機構ＧＶ、ＢＶａと一次側圧力調整機構ＧＡ、Ｂとを備えた現場設備１００、２００において、制御対象気体Ｇ、Ａを現場配管Ｈ１、Ｈ２に通流している状態で、流量制御弁ＲＶｇ、ＲＶａを所定の初期設定開度に維持した状態で二次側燃料圧力調整機構ＧＶ、ＢＶａにて二次側出口の圧力を所定の初期設定二次圧に設定した後、一次側圧力調整機構ＧＡ、Ｂにて一次側入口の圧力を所定の流量制御圧力に維持している状態で、流量制御部Ｓ１は、記憶部Ｓ３に記憶された開度流量関係に基づいて、流量制御弁ＲＶｇ、ＲＶａの開度を制御して制御対象気体の流量を目標流量に制御する。【選択図】図１