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UID:pretalx-amfc2026-KYXWXP@modelica.simtek.cc
DTSTART;TZID=CST:20260921T153500
DTEND;TZID=CST:20260921T160000
DESCRIPTION:System-level thermal-hydraulic models provide bulk quantities b
 ut cannot directly resolve rod-wise temperatures or hotspot migration duri
 ng local accidents. This study develops an FMI-based multiscale workflow 
 that couples a Modelica primary-loop FMU with an OpenFOAMderived reduced-o
 rder model of a 3×3 lead-bismuth eutectic rod bundle through a Python dri
 ver. Four scenarios are evaluated: baseline operation\, single-rod local o
 verpower\, and local overpower combined with mild or moderate loss of flo
 w. The coupled model predicts bundleaverage outlet temperature\, nine rod 
 temperatures\, hotspot temperature\, and limiting-rod location. The hotspo
 t-tooutlet temperature difference increases from 0.803 K in the baseline c
 ase to 18.274 K under local overpower with moderate flow reduction\, whil
 e the hotspot migrates to the south-east rod. OpenFOAM calculations at 15 
 s and 40 s identify the same limiting rod. All four 60 s scenarios require
  0.319 s of online execution time\, demonstrating faster-than-real-time lo
 cal accident assessment.
DTSTAMP:20261004T070648Z
LOCATION:FMI & MBSE (R2001)
SUMMARY:An FMI-Based Multiscale Workflow for Multi-Scenario Local Accident 
 Assessment in LBE Reactor Rod Bundles - Xinheng Zhao\, Guangliang Chen\, M
 injun Peng\, Xiang Zhang
URL:https://modelica.simtek.cc/amfc2026/talk/KYXWXP/
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BEGIN:VEVENT
UID:pretalx-amfc2026-QEWZYQ@modelica.simtek.cc
DTSTART;TZID=CST:20260921T153500
DTEND;TZID=CST:20260921T160000
DESCRIPTION:Printed circuit heat exchangers (PCHEs) are key components in s
 upercritical carbon dioxide (S-CO2) Brayton cycles because of their compac
 t structure and high heat transfer capability. However\, existing studies 
 have mainly focused on steady-state structural optimization or isolated co
 mponent analysis\, while the influence of geometric parameters on thermal-
 hydraulic responses under system-level transient disturbances remains insu
 fficiently understood. In this study\, a Modelica-based dynamic simulation
  framework is developed for the system-level analysis of recuperators in a
 n S-CO2 Brayton cycle. A one-dimensional dynamic PCHE model is established
  and validated against benchmark data\, with a maximum relative error of 0
 .87%. A continuously varying heat sink temperature ranging from 22 ° C to
  26 ° C is introduced as a representative offdesign disturbance. The effe
 cts of channel diameter and channel length on heat transfer coefficient an
 d pressure drop are investigated under both design reference and transient
  operating conditions. The results show that smaller channels and longer f
 low paths enhance heat transfer performance but introduce larger pressure-
 drop penalties under the design reference condition. Under transient heat 
 sink temperature disturbances\, smalldiameter and long-channel configurati
 ons exhibit stronger thermal-hydraulic response variations than under stea
 dystate conditions. These results indicate that parameter trends obtained 
 under steady-state conditions may not directly represent transient thermal
 -hydraulic behavior under off-design operation. The proposed framework pro
 vides an efficient approach for preliminary parametric assessment and syst
 em-level transient analysis of recuperators in S-CO2 Brayton cycles.
DTSTAMP:20261004T070648Z
LOCATION:Energy (R2002)
SUMMARY:Modelica-Based Parametric Analysis of Steady-State and Transient Th
 ermal-Hydraulic Characteristics of PCHEs in SCO2 Brayton Cycles - Hao Xu\,
  Yifan Xu\, Yuandong Zhang\, Minjun Peng\, Genglei Xia
URL:https://modelica.simtek.cc/amfc2026/talk/QEWZYQ/
END:VEVENT
BEGIN:VEVENT
UID:pretalx-amfc2026-KUG88X@modelica.simtek.cc
DTSTART;TZID=CST:20260921T160000
DTEND;TZID=CST:20260921T162500
DESCRIPTION:To be come
DTSTAMP:20261004T070648Z
LOCATION:Energy (R2002)
SUMMARY:Analysis of Charging and Discharging Control Schemes for S-CO₂ Re
 actor Systems Based On Modelica - Yuchen Niu\, Yuandong Zhang\, Minjun Pen
 g\, Genglei Xia\, Chenyang Wang
URL:https://modelica.simtek.cc/amfc2026/talk/KUG88X/
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