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UID:pretalx-amfc2026-YPFXCM@modelica.simtek.cc
DTSTART;TZID=CST:20260921T162500
DTEND;TZID=CST:20260921T165000
DESCRIPTION:The operational control strategy of a refrigeration plant direc
 tly impacts its annual energy efficiency. Conventional control logic\, bas
 ed on static design conditions or time-scheduled fixed parameters\, cannot
  effectively adapt to continuous fluctuations in cooling load and meteorol
 ogical conditions. This paper employs a model-based Dymola environment to 
 develop a fullsystem model of a high-efficiency refrigeration plant and pr
 oposes a dynamic control strategy driven by hourly cooling load and outdoo
 r meteorological parameters. Based on the hourly cooling load profile of a
  public building in a hot-summer warm-winter climate zone\, the proposed s
 trategy is simulated and compared against a conventional baseline. The res
 ults indicate that the proposed strategy achieves an energy efficiency rat
 io (EER) of 6.02 over the cooling season\, representing a 19.4% improvemen
 t compared to the baseline strategy. The proposed methodology offers a pra
 ctical reference for control strategy optimization in chiller plants of la
 rge public facilities with fluctuating cooling loads\, such as airports an
 d shopping malls.
DTSTAMP:20261004T070644Z
LOCATION:(Electric) Mobility & Buildings (R2003)
SUMMARY:Control Strategy for a High-Efficiency Refrigeration Plant Based on
  Dymola Simulation: A Case Study of a Xiamen Airlines Support Facility - H
 aoran Wu\, Yuhui Wang\, Hejiang Sun
URL:https://modelica.simtek.cc/amfc2026/talk/YPFXCM/
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UID:pretalx-amfc2026-FDENKU@modelica.simtek.cc
DTSTART;TZID=CST:20260922T110500
DTEND;TZID=CST:20260922T113000
DESCRIPTION:Safe operation of biosafety laboratories requires directional a
 irflow and stable pressure gradients to contain pathogenic aerosols. Howev
 er\, door operations between the core and buffer rooms frequently disrupt 
 this balance\, inducing transient pressure disturbances. Conventional PI c
 ontrol often responds inadequately to such rapid transients\, which can le
 ad to airflow reversal and compromise biosafety. This study develops a Mod
 elicabased two-zone transient differential pressure regulation model for t
 he core and buffer rooms and proposes a coordinated control strategy that 
 integrates feedforward compensation with an integral-freezing mechanism. D
 uring door opening\, the feedforward mechanism adjusts the exhaust airflow
 \, rapidly increasing the doorway air mass flow rate to 0.12–0.14 kg/s. 
 This establishes a directional airflow barrier (velocity ≥ 0.2 m/s)\, th
 ereby reducing the risk of leakage during personnel transit. By freezing t
 he PI integral term during the door-open phase and applying feedforward ex
 haust compensation upon closure\, the proposed strategy restricts the maxi
 mum pressure undershoot during door closure to −17 Pa (against the −15
  Pa design setpoint)\, compared to −24 Pa under conventional PI control.
  The pressure recovery time is also reduced from 48.3 s to 13.6 s. These f
 indings provide a simulation-based basis for improving the dynamic contain
 ment of high-level biosafety laboratories under transient disturbances.
DTSTAMP:20261004T070644Z
LOCATION:(Electric) Mobility & Buildings (R2003)
SUMMARY:Coordinated Pressure Control Strategy Integrating Feedforward Compe
 nsation and Integral Freezing for Biosafety Laboratories under Transient D
 oor Operation Disturbances - Yuhui Wang\, Hejiang Sun
URL:https://modelica.simtek.cc/amfc2026/talk/FDENKU/
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