RANKINE CYCLE SYSTEM AND CONTROL METHOD OF RANKINE CYCLE SYSTEM

• Main Authors: ABE MAKOTO, FUKUNAGA SUSUMU, KATO KOTA, MATSUUKI TOMOFUYU
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• Subjects: BLASTING; COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; 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; STEAM ACCUMULATORS; STEAM ENGINE PLANTS; STEAM ENGINES; USE OF WASTE HEAT OF COMBUSTION ENGINES; WEAPONS

To provide a Rankine cycle system which can quickly eliminate a high-temperature/high-pressure state of a working fluid in a circuit of the Rankine cycle system at a finish of an operation of the Rankine cycle system, and its control method.SOLUTION: At a stop of an operation of a Rankine cycle system 10, when a temperature Te of a working fluid Fw is not lower than a preset stop reference value Tec at a time point at which an operation of an expander 14 is stopped, the circulation of the working fluid Fw by a working fluid pump 12 and the circulation of a cooling medium W for cooling the working fluid Fw by a condenser 15 are continued until the temperature Te becomes lower than the stop reference value Tec, and on an after the time point at which the temperature Te becomes lower than the stop reference value Tec, an operation of the working fluid pump 12 and the circulation of the cooling medium W to the condenser 15 are stopped.SELECTED DRAWING: Figure 6 【課題】ランキンサイクルシステムの運転終了時に、ランキンサイクルシステムの回路における作動流体の高温・高圧状態を速やかに解消できるランキンサイクルシステム、及び、その制御方法を提供する。【解決手段】ランキンサイクルシステム１０の運転の停止に際して、膨張機１４の運転を停止した時点で、作動流体Ｆｗの温度Ｔｅが予め設定された停止用基準値Ｔｅｃ以上である場合には、この温度Ｔｅが停止用基準値Ｔｅｃ未満になるまで、作動流体用ポンプ１２による作動流体Ｆｗの循環と、凝縮器１５で作動流体Ｆｗを冷却するための冷却媒体Ｗの循環を継続し、この温度Ｔｅが停止用基準値Ｔｅｃ未満になった時点以降に、作動流体用ポンプ１２の運転の停止と、凝縮器１５への冷却媒体Ｗの循環を停止する。【選択図】図６