Development of accelerated PCHE off-design performance model for optimizing power system operation strategies in S-CO2 Brayton cycle

Kwon, Jin Su; Bae, Seong Jun; Heo, Jin Young; Lee, Jeong Ik

doi:10.1016/j.applthermaleng.2019.113845

Cited by 32 publications

(5 citation statements)

References 24 publications

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“…Findings: Thermal-hydraulic correlations for zigzagchannel PCHEs covering a broad range of design parameters have been developed and evaluated for the estimation of thermal and hydraulic performance. Kwon et al [19] (Numerical study)…”

Section: Numerical Tool: Ansys ® Cfx 172mentioning

confidence: 99%

“…Kern and Log Mean Temperature Difference (LMTD) methods which are normally used in heat exchanger design could be used to develop PCHE code for evaluation of thermal-hydraulic performance and economics of PCHEs (Lee et al [8,30]). Log Mean Temperature Difference (LMTD) and ε-NTU methods are the two (2) conventional methods used in modelling of heat exchangers to predict system performance in the view of heat transfer but modifications to these methods are required to predict thermal performance if PCHEs are to be used for pre-coolers and recuperators near critical conditions and at supercritical conditions (Kwon et al [19]).…”

Section: Design and Performance Optimization Of Heat Exchangersmentioning

confidence: 99%

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Printed Circuit Heat Exchangers (PCHEs): A Brief Review

Shitsi

Debrah

Agbodemegbe

et al. 2023

Int. Res. J. multidiscip. Technovation

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Heat exchangers and other heat transfer devices/systems play vital roles of heat transfer in thermal fluid flow systems for industrial application. Sodium cooled fast reactors are normally designed to have two loops of sodium coolants and one loop of water coolant which generates steam for power production. The two loops of sodium coolants consist of primary cooling system of sodium which cools the fuel rods of the reactor core and secondary cooling system of sodium transferring heat from the sodium primary cooling system. The water-cooling system transfers heat from the secondary cooling system of sodium for steam generation. Lead cooled fast reactors on the other hand are designed to have primary cooling system of lead cooling the fuel rods in the reactor core and secondary cooling system of water transferring heat from the lead cooling primary system for steam generation. Water cooled Nuclear Power Plants used water to cool the reactor core in the primary system and the heat removed from the core is used for steam generation directly as in BWRs and SCWRs or in the secondary system of heat exchanger as in PWRs. Other reactor systems such as Gas-cooled fast reactor (GFR), Molten-salt reactor (MSR), High-temperature gas-cooled reactor (HTGR), and Small Modular Reactors (SMRs) also have various types of heat exchangers in their designs to support power/electricity generation. Appropriate heat exchangers are therefore needed for various stages of heat transfer in power generation systems. Thus, Heat exchangers and other heat transfer devices/systems play vital roles of heat transfer in thermal fluid flow systems for industrial applications. This study presents brief review of PCHEs which have comparable advantages over other types of heat exchangers. Recent studies on PCHEs and other heat exchanger types have been reviewed. Design and optimization of PCHEs, optimization of Brayton and Rankine circles, and fluid flow and heat transfer devices/systems have been discussed briefly. The review findings show that the design and optimization of PCHEs depends on the intended industrial application of the heat exchanger. The various channel types and channel cross-section types available for design and optimisation as well as the design and optimised system being able to withstand high pressure and temperature conditions in addition to its compact size for the intended industrial application make PCHEs unique among other types of heat exchangers.

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Section: Numerical Tool: Ansys ® Cfx 172mentioning

confidence: 99%

Section: Design and Performance Optimization Of Heat Exchangersmentioning

confidence: 99%

Printed Circuit Heat Exchangers (PCHEs): A Brief Review

Shitsi

Debrah

Agbodemegbe

et al. 2023

Int. Res. J. multidiscip. Technovation

View full text Add to dashboard Cite

show abstract

“…Sharing the same goal as Ma et al [78], Kwon et al [79] developed PCHE off-design quasi-steady-state performance models for regenerator and precooler in a S-CO 2 Brayton cycle to optimize the operation strategy of power system under off-design conditions.…”

Section: Pche With Straight Channelsmentioning

confidence: 99%

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

Liao

Zhang

et al. 2021

Energies

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Heat exchangers play an important role in power, the chemical industry, petroleum, food and many other industrial productions, while compact heat exchangers are more favored in industrial applications due to their high thermal efficiency and small size. This paper summarizes the research status of different types of compact heat exchangers, especially the research results of heat transfer and pressure drop of printed circuit heat exchangers, so that researchers can have an overall understanding of the development of compact heat exchangers and get the required information quickly. In addition, this paper summarizes and analyzes several main working fluids selected in compact heat exchangers, and puts forward some discussions and suggestions on the selection of working fluids. Finally, according to the existing published literature, the performance evaluation indexes of compact heat exchangers are summarized and compared, which is convenient for developers and researchers to better grasp the design direction.

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“…In addition, profound structural rigidity is guaranteed for high temperature and pressure application due to the nature of the diffusion‐bonding process. The design parameter and performance of the heat exchangers are estimated by in‐house KAIST‐HXD code . The governing equations of KAIST‐HXD are shown in Equations .…”

Section: Kaist Micro Modular Reactormentioning

confidence: 99%

“…The design parameter and performance of the heat exchangers are estimated by in-house KAIST-HXD code. 29,31,32 The governing equations of KAIST-HXD are shown in Equations (1) to (3). Information of the designed PCHEs is summarized in Table 3.…”

Section: Component Geometriesmentioning

confidence: 99%

Radionuclide transport in a long‐term operation supercritical CO ₂ ‐cooled direct‐cycle small nuclear reactor

Son

Kwon

et al. 2020

Int J Energy Res

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Summary In recent years, to overcome the challenges of nuclear power plants due to their large scale, numerous types of small modular reactors are being designed worldwide. Small modular reactors are required to have a capability to operate in environmentally challenging regions with long refueling time. Supercritical CO2 (S‐CO2)‐cooled direct‐cycle reactor is one of the candidates that can meet these requirements. In order to evaluate if the design achieves this goal, transport of generated radionuclides from the long‐term operation has to be evaluated in order to estimate the radioactivity accumulation in the system. However, existing radionuclide transport evaluation method does not reflect the characteristics of supercritical fluids properly. In this paper, the fission product plate‐out behavior of Korea Advanced Institute of Science and Technology Micro Modular Reactor (KAIST‐MMR), a 10‐MWe class S‐CO2‐cooled fast reactor with direct S‐CO2 power conversion system, is studied. The evaluation methodology was developed via integrating suitable models while considering the shape of the nuclear fuel, component geometries, characteristics of a working fluid in supercritical state, and the fast reactor design. As a result of the analysis, the degree of plate‐out of KAIST‐MMR is not expected to have serious radioactivity accumulation within the components. Most of the sorption occurred at the turbine and recuperator hot‐side inlet region. In particular, the dose rate of the turbine was quite low, because the size of the turbine is very small.

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Development of accelerated PCHE off-design performance model for optimizing power system operation strategies in S-CO2 Brayton cycle

Cited by 32 publications

References 24 publications

Printed Circuit Heat Exchangers (PCHEs): A Brief Review

Printed Circuit Heat Exchangers (PCHEs): A Brief Review

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

Radionuclide transport in a long‐term operation supercritical CO ₂ ‐cooled direct‐cycle small nuclear reactor

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Development of accelerated PCHE off-design performance model for optimizing power system operation strategies in S-CO2 Brayton cycle

Cited by 32 publications

References 24 publications

Printed Circuit Heat Exchangers (PCHEs): A Brief Review

Printed Circuit Heat Exchangers (PCHEs): A Brief Review

A Review on the Thermal-Hydraulic Performance and Optimization of Compact Heat Exchangers

Radionuclide transport in a long‐term operation supercritical CO 2 ‐cooled direct‐cycle small nuclear reactor

Contact Info

Product

Resources

About

Radionuclide transport in a long‐term operation supercritical CO ₂ ‐cooled direct‐cycle small nuclear reactor