Evaluation of control strategies for airport refueling system
[Objective]With the rising demand in civil aviation and the continual growth of large-and medium-sized airports,reliable and secure apron hydrant pipeline systems are essential for enabling the smooth movement of passengers and cargo at civil aviation airports.Furthermore,an accurate pump start/stop control strategy is vital to ensuring the efficient operation of an automated control system for oil supply at constant pressures.[Methods]An offline simulation program was developed utilizing the characteristic method for hydrant pipeline systems.This program was then cross-checked against SPS software results to validate its accuracy.Subsequently,within the setting of an airport in China,encompassing its actual pipeline network structure and refueling data,simulations were conducted,incorporating different control modes(single-pump frequency conversion and multi-pump frequency conversion)and diverse measurement parameters(pressure-frequency and pressure-flow).Accounting for fluctuations in refueling flow at the airport over a single day,these simulations generated the time-varying outlet pressures at the depot and operational states of refueling pumps under different control strategies.The subsequent statistical analysis enabled the derivation of pump start/stop frequencies and energy consumption associated with pump unit operations for further comparative evaluation.[Results]In control scenarios utilizing pressure-frequency measurements,the system tended to initiate refueling pumps more frequently to manage pressure fluctuations,leading to a higher maximum number of operating pumps compared to scenarios based on pressure-flow measurements.The core objective of pump start-stop control is to align the number of operational pumps with the refueling demand.Additionally,implementing a control strategy that halts pumps more timely presents an effective solution for reducing energy losses.A thorough analysis highlighted the efficacy of the multi-pump variable frequency control mode in maintaining stable pipeline pressures through pump speed adjustments during pump stoppages and significantly decreasing energy consumption by employing pressure-flow measurements to guide pump start/stop decisions.This approach enhances both safety and cost-efficiency in system operations.[Conclusion]The research findings provide valuable insights for design and operational personnel to optimize pump start-stop control strategies.These outcomes are conducive to airport refueling systems in improving planning and design rationale,enhancing dispatching management safety,and refining operational control accuracy.(8 Figures,3 Tables,20 References)
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