Size optimization of heat exchanger and thermoeconomic assessment for supercritical CO2 recompression Brayton cycle applied in marine

Du, Yang; Hu, Chenxing; Yang, Ce; Wang, Haimei; Dong, Wuqiang

doi:10.1016/j.energy.2021.122306

Cited by 33 publications

(11 citation statements)

References 38 publications

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“…The verification results of the recuperator using MSTE were described in earlier research by the author, 55 which confirms the feasibility of the 1D design procedure. Thus, the published experimental data are employed to verify the 1D design of the microtube cooler based on the modified model 56 .…”

Section: Methods and Methods Validationsupporting

confidence: 73%

“…where A 100 represents the heat exchange area calculated for 100 sub-heat exchangers, and ζ represents the residual error. When the ζ of 10 À4 is set, the discrete numbers The verification results of the recuperator using MSTE were described in earlier research by the author, 55 which confirms the feasibility of the 1D design procedure. Thus, the published experimental data are employed to verify the 1D design of the microtube cooler based on the modified model.…”

Section: Verification Of the Design Methods Of Mstessupporting

confidence: 66%

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Multi‐objective optimization of thermoeconomic and component size of supercritical carbon dioxide recompression cycle based on small‐scale lead‐cooled fast reactor

Wang

et al. 2022

Intl J of Energy Research

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Summary When the supercritical CO2 power cycle is employed in confined spaces, such as nuclear‐powered ships and spacecraft, its size should be given priority. To estimate the component size, the one‐dimensional heat exchanger model developed in this study is used in a recompression supercritical CO2 cycle integrated on a small‐scale lead‐cooled fast reactor. A parameter analysis was performed to study the influence of several key parameters on the levelized cost of electricity, thermal efficiency, and system size. Moreover, four types of multi‐objective optimizations were conducted to provide optimization schemes for different scenarios. Results indicated that the increased turbine inlet temperature improved the thermoeconomic but augmented the system volume. The size of the low‐temperature recuperator was observably enlarged near the optimal flow split ratio, thereby increasing the system volume. Pareto optimal solution of bi‐objective optimization based on the levelized cost of electricity and system size reached the lowest system volume of 3.71 m3. Additionally, the best trade‐off result of three‐objective optimization was a thermal efficiency of 42.14%, a levelized cost of electricity of 56.30 $∙MWh−1, and a system volume of 4.43 m3. Meanwhile, maximal and minimal pressure drops of CO2 appeared in the cooler and intermediate heat exchanger, respectively.

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Section: Methods and Methods Validationsupporting

confidence: 73%

Section: Verification Of the Design Methods Of Mstessupporting

confidence: 66%

Multi‐objective optimization of thermoeconomic and component size of supercritical carbon dioxide recompression cycle based on small‐scale lead‐cooled fast reactor

Wang

et al. 2022

Intl J of Energy Research

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“…In general, the optimization of HXs can be classified into three types: the size optimization, the shape optimization and the topology optimization (TO). The size/shape optimization has been well developed for years [15]- [17], which refers to the design process that searches for the optimal size or shape in the given configuration or arrangement for a specific HX [18]. In practice, good performance improvement can still be achieved with the careful selection of the initial structures and optimization criteria [19].…”

Section: Introductionmentioning

confidence: 99%

Topology optimization of heat exchangers: A review

Fawaz

Younan

Corre

et al. 2022

Energy

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“…The last few decades have witnessed the pursuit of an effective and compact power conversion technology; the supercritical CO 2 Brayton cycle (SCO 2 ‐BC), originally proposed by Feher, 11 was recommended for combination with a nuclear reactor 12 . Considering the characteristics of CO 2 in near‐critical conditions, such as high density and heat capacity, SCO 2 ‐BC is more efficient and compact 13 than the steam Rankine cycles. The supercritical CO 2 recompression Brayton cycle (SCO 2 ‐RC) proposed by Angelino 14 exhibited the best economic performance 15 among all advanced cycle configurations based on SCO 2 ‐BC.…”

Section: Introductionmentioning

confidence: 99%

Off‐design performance of supercritical carbon dioxide cycle combined with organic Rankine cycle for maritime nuclear propulsion system under different control strategies

Yang

et al. 2022

Intl J of Energy Research

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Summary A combined power conversion system, which consists of a supercritical carbon dioxide recompression cycle with an organic Rankine cycle as the bottoming cycle, has broad potential for maritime propulsion applications. However, the performance of the combined system under the off‐design condition and operating states of compressors with a wide range of load variations and different control strategies have not been comprehensively investigated. Therefore, a simulation model for the combined system under off‐design conditions is established in the present study to investigate the compressors operating states and the performance of the system under different control strategies. The result shows that a peak efficiency of 42.82% and total production unit cost of 11.6 $/GJ are achieved at the design point for the combined system, where the pressure ratio, flow split ratio, and evaporating pressure are 2.7, 0.27, and 770 kPa, respectively. When the relative load varies from 100% to 10%, the efficiency of the inventory‐controlled system decreases by 19.07%, and the efficiency of the bypass‐controlled system decreases by 34.3%. For the 10% load scenario, the compressors tend to surge under the inventory‐controlled strategy and approach the choke area under the bypass‐controlled strategy. The adoption of the inventory‐bypass hybrid control strategy keeps the compressors of the low‐load system away from the surge and choke areas, and the efficiency is between those of the systems controlled by the two separate strategies.

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Size optimization of heat exchanger and thermoeconomic assessment for supercritical CO2 recompression Brayton cycle applied in marine

Cited by 33 publications

References 38 publications

Multi‐objective optimization of thermoeconomic and component size of supercritical carbon dioxide recompression cycle based on small‐scale lead‐cooled fast reactor

Multi‐objective optimization of thermoeconomic and component size of supercritical carbon dioxide recompression cycle based on small‐scale lead‐cooled fast reactor

Topology optimization of heat exchangers: A review

Off‐design performance of supercritical carbon dioxide cycle combined with organic Rankine cycle for maritime nuclear propulsion system under different control strategies

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