The security of energy import: Do economic policy uncertainty and geopolitical risk really matter?
In: Economic Analysis and Policy, Band 82, S. 377-388
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In: Economic Analysis and Policy, Band 82, S. 377-388
In: Science and technology of nuclear installations, Band 2014, S. 1-8
ISSN: 1687-6083
Aiming at the heat transfer calculation of the Passive Residual Heat Removal Heat Exchanger (PRHR HX), experiments on the heat transfer of C-shaped tube immerged in a water tank were performed. Comparisons of different correlation in literatures with the experimental data were carried out. It can be concluded that the Dittus-Boelter correlation provides a best-estimate fit with the experimental results. The average error is about 0.35%. For the tube outside, the McAdams correlations for both horizontal and vertical regions are best-estimated. The average errors are about 0.55% for horizontal region and about 3.28% for vertical region. The tank mixing characteristics were also investigated in present work. It can be concluded that the tank fluid rose gradually which leads to a thermal stratification phenomenon.
In: Science and technology of nuclear installations, Band 2017, S. 1-10
ISSN: 1687-6083
The Passive Residual Heat Removal Heat Exchanger (PRHR HX) is an important part of the Passive Residual Heat Removal System (PRHRS). The C-shaped bundle is being used in the PRHR HX. A test facility of C-shaped tube immerged in a water tank was built to research the heat transfer of the PRHR HX. Through the experiments, three regions were found within a particular period of time during the heating process in the tank: natural convection region, transition region, and saturation boiling region. For the tube outside saturation boiling, comparisons of three different correlations in literatures with the experimental data were carried out. Results show that the Rohsenow correlation provides a best-estimate fit with the experimental results. For the tube outside transition region, a formulation is put forward to reduce error based on the Rohsenow subcooled boiling correlation.
In: JEMA-D-22-03235
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In: CEJ-D-21-24154
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In: Computers and electronics in agriculture: COMPAG online ; an international journal, Band 211, S. 108007
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 253, S. 114634
ISSN: 1090-2414
In: STOTEN-D-22-20342
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