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Effect of thermal parameters on performance of modular helium reactors
Author(s) -
Şahin Hac𝚤 Mehmet,
Akbay𝚤r Ömür,
Kocar Cemil
Publication year - 2012
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.1949
Subject(s) - coolant , computational fluid dynamics , fluent , helium , nuclear engineering , inlet , mechanics , turbulence , mass flow rate , modular design , volumetric flow rate , thermodynamics , materials science , thermal hydraulics , chemistry , mechanical engineering , heat transfer , engineering , physics , computer science , operating system , organic chemistry
SUMMARY In this study, effects of increase in the coolant outlet temperature for the modular helium reactor (MHR) were studied. Therefore, the inlet temperature, flow rate and bypass flow fraction were modified to increase the outlet temperature. The simulations were carried out by using computational fluid dynamics software (ANSYS 12 FLUENT CFD code) as the steady‐state condition in three dimensions with k‐ε turbulence model and enhanced wall treatment. The simulated geometry was chosen as a unit cell. Four alternative operating conditions were proposed to MHR. The studied modifications substantially increased coolant outlet temperatures. In addition, they resulted in an increase of fuel centerline temperatures. In all of the cases considered, the maximum fuel temperature was obtained 1443 °C with a coolant inlet temperature of 491 °C and a coolant flow rate of 226 kg/s. Copyright © 2011 John Wiley & Sons, Ltd.