Pressure Response Evaluation for Start/Stop of City Gas Pipeline System

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  • 都市ガス管路系の使用開始・使用停止時の圧力応答評価
  • トシ ガス カンロケイ ノ シヨウ カイシ ・ シヨウ テイシジ ノ アツリョク オウトウ ヒョウカ

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Abstract

<p>When a large customer starts or stops using city gas, flow and pressure fluctuations occur in surrounding pipeline .From the perspective of maintaining a stable supply and preventing accidents, it is important to evaluate whether the pressure exceeds the maximum design pressure of the pipe or falls below the minimum pressure required for supply .In this study, we first measured the pressure response in an air experiment .The reproducibility of experimental values was confirmed by numerical simulation [1] .Next, parameter studies were conducted for city gas operating conditions (pipe length, supply pressure, and consumption flow rate), and it was shown that the pressure fluctuation values are correlated with pipe friction, inertia, flow velocity, kinetic energy, and pipe length .Within the scope of this study, the maximum pressure fluctuation was at most 30 % and the minimum pressure fluctuation was at most 10 % for all operational conditions.</p>

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