Calculation Method of Passive Residual Heat Removal Heat Exchanger and Numerical Simulation

Men, Qiming; Wang, Xuesheng; Zhou, Xiang; Meng, Xiangyu

doi:10.4236/jpee.2014.29002

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…Next is the conduction of heat through the tube's wall; and in the end, the heat transfer from the tube's wall to the coolant. The total heat flux transferred from the fuel to the coolant may be determined as below …”

Section: Reactor Design Descriptionmentioning

confidence: 99%

“…In order to calculate , it is necessary to know the heat transfer coefficients α 1 and α 2 . These coefficients can be calculated by using the Dittus‐Boelter correlation as follows:

α_{1} = 0.023 \cdot λ false/ false(2 r_{1} false) \cdot R e^{0.8} \cdot P r^{0.33},

where Reynolds and Prandtl numbers are defined as

R e = false(ρ \cdot u \cdot l false) false/ μ,

P r = false(c_{p} \cdot μ false) false/ λ,

and ρ ‐ density, u ‐ velocity of the fluid, l ‐ characteristic linear dimension, c p ‐ specific heat, μ ‐ dynamic viscosity, and λ ‐ thermal conductivity.…”

Section: Reactor Design Descriptionmentioning

confidence: 99%

“…The total heat flux transferred from the fuel to the coolant may be determined as below. 16 The heat transfer from the fuel medium to the inner wall of a SiC tube exchanger reads as (cf. Figure 1, right)…”

Section: Thermal Calculationsmentioning

confidence: 99%

“…In order to calculate (2.4), it is necessary to know the heat transfer coefficients 1 and 2 . These coefficients can be calculated by using the Dittus-Boelter correlation 16,17 as follows:…”

Section: Thermal Calculationsmentioning

confidence: 99%

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Determination of the liquid eutectic metal fuel dual fluid reactor (DFRm) design – steady state calculations

et al. 2019

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Summary The dual fluid reactor (DFR) is a novel concept of a very high‐temperature (fast) reactor that falls off the classification of generation 4 international forum (GIF). DFR makes best of the two previous designs: molten salt reactor (MSR) and lead‐cooled fast reactor (LFR). In this paper, we present a new reactor design Dual Fluid Reactor metallic (DFRm) with the liquid eutectic U‐Cr metal fuel composition and the lead coolant of which general idea was patented recently. By performing the first steady state neutronic calculations for such a reactor (the neutron flux density as a function of energy, the burnup, the effective multiplication factor/reactivity), we show that this 250‐MWth reactor is critical, and that it can operate almost 20 years without refuelling. We also optimise the geometry (reflector thickness, fuel tubes pin pitch) with respect to the multiplication factor. The optimisation together with some other opportunities for the liquid metal fuel design (eg, the use of electromagnetic pumps to circulate the medium) allows DFRm to be of a small size. This rises economy of the construction as expressed nicely in terms of the energy return on invested (EROI) factor, which is even higher than for the molten salt fuel design (DFRs). Last but not least, we show that DFRm has all the (fuel, coolant, reflector) temperature coefficients negative, which is an important factor of the passive safety.

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Section: Reactor Design Descriptionmentioning

confidence: 99%

“…In order to calculate , it is necessary to know the heat transfer coefficients α 1 and α 2 . These coefficients can be calculated by using the Dittus‐Boelter correlation as follows:

α_{1} = 0.023 \cdot λ false/ false(2 r_{1} false) \cdot R e^{0.8} \cdot P r^{0.33},

where Reynolds and Prandtl numbers are defined as

R e = false(ρ \cdot u \cdot l false) false/ μ,

P r = false(c_{p} \cdot μ false) false/ λ,

and ρ ‐ density, u ‐ velocity of the fluid, l ‐ characteristic linear dimension, c p ‐ specific heat, μ ‐ dynamic viscosity, and λ ‐ thermal conductivity.…”

Section: Reactor Design Descriptionmentioning

confidence: 99%

Section: Thermal Calculationsmentioning

confidence: 99%

Section: Thermal Calculationsmentioning

confidence: 99%

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Determination of the liquid eutectic metal fuel dual fluid reactor (DFRm) design – steady state calculations

et al. 2019

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“…The simulation employs the porous media model to simplify the complicated tube bundle structure. Men et al [19] analyzed the tube inside and outside heat transfer mechanism of PRHR HX under natural convection condition, and the results were compared with simulated results of the single-tube coupling model three-dimensional natural circulation in the IRWST. In the work, the theoretical calculation method is suitable for the heat transfer calculation of PRHR HX.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Analysis of Passive Residual Heat Removal Heat Exchanger under Tube outside Boiling Condition

Liu

Wang

Men

et al. 2017

Science and Technology of Nuclear Installations

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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.

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Numerical and experimental study of the transient conjugate heat transfer and fluid flow of passive residual heat removal heat exchanger

Liu

Wang

et al. 2022

International Journal of Thermal Sciences

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Calculation Method of Passive Residual Heat Removal Heat Exchanger and Numerical Simulation

Cited by 6 publications

References 6 publications

Determination of the liquid eutectic metal fuel dual fluid reactor (DFRm) design – steady state calculations

Determination of the liquid eutectic metal fuel dual fluid reactor (DFRm) design – steady state calculations

Heat Transfer Analysis of Passive Residual Heat Removal Heat Exchanger under Tube outside Boiling Condition

Numerical and experimental study of the transient conjugate heat transfer and fluid flow of passive residual heat removal heat exchanger

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