Multi-Objective Constructal Optimization for Marine Condensers

Feng, Huijun; Tang, Wei; Chen, Lingen; Shi, Junchao; Wu, Zhixiang

doi:10.3390/en14175545

Cited by 31 publications

(6 citation statements)

References 97 publications

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“…Energies 2022, 15, x FOR PEER REVIEW 3 of 15 decision method. Feng et al [51] performed MOO for marine condensers and compared the optimization results of single-objective optimization and three decision methods based on the deviation index. Feng et al [52] performed MOO of a marine boiler by taking the EGR and the pumping power consumption as objectives, and compared the optimization results of three decision methods based on the deviation index.…”

Section: Physical Modelmentioning

confidence: 99%

“…Zhang et al [50] performed MOO for a trapezoidal HGB with heat conduction and flow, taking the EGR and the pumping power consumption as objectives, obtained the Pareto frontier based on the NSGA-II, and selected the optimal result using the TOPSIS decision method. Feng et al [51] performed MOO for marine condensers and compared the optimization results of single-objective optimization and three decision methods based on the deviation index. Feng et al [52] performed MOO of a marine boiler by taking the EGR and the pumping power consumption as objectives, and compared the optimization results of three decision methods based on the deviation index.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Objective Constructal Design for Square Heat-Generation Body with “Arrow-Shaped” High-Thermal-Conductivity Channel

Zhu

Chen

et al. 2022

Energies

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Based on the square heat-generation body (HGB) with “arrow-shaped” high-thermal-conductivity channel (HTCC) model established in the previous literature, we performed multi-objective optimization (MOO) with maximum temperature difference (MTD) minimization and entropy-generation rate (EGR) minimization as optimization objectives for its performance. Pareto frontiers with optimal set were obtained based on NSGA-II. TOPSIS, LINMAP, and Shannon entropy decision methods were used to select the optimal results in Pareto frontiers, and the deviation index was used to compare and analyze advantages and disadvantages of the optimal results for each decision method. At the same time, multi-objective constructal designs of the “arrow-shaped” HTCC were carried out through optimization of single degree of freedom (DOF), two DOF, and three DOF, respectively, and the thermal performance of the square heat-generation body under optimizations of different DOF were compared. The results show that constructal design with the MOO method can achieve the best compromise between the maximum thermal resistance and the irreversible loss of heat transfer of the square heat-generation body, thereby improving the comprehensive thermal performance of the square heat-generation body. The MOO results vary with different DOF, and optimization with increasing DOF can further improve the comprehensive thermal performance of square HGBs.

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Section: Physical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-Objective Constructal Design for Square Heat-Generation Body with “Arrow-Shaped” High-Thermal-Conductivity Channel

Zhu

Chen

et al. 2022

Energies

Self Cite

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“…Its flow and heat transfer characteristics are mainly affected by channel structure, fluid property, and operating parameters. Theoretical analysis [13], experimental tests [14,15], numerical simulation [16,17], and other methods are commonly used to study heat exchangers. Some scholars use three-dimensional numerical simulation methods to conduct the calculation of straight channel [18][19][20][21], Zigzag channel [22][23][24][25], S-shaped fins channel [26][27][28][29], and airfoil fins channel [30][31][32][33] structures and obtained detailed temperature and velocity fields.…”

Section: Introductionmentioning

confidence: 99%

Fast Calculation of Supercritical Carbon Dioxide Flow, Heat Transfer Performance, and Mass Flow Rate Matching Optimization of Printed Circuit Heat Exchangers Used as Recuperators

Xi,

Xie,

Zhao

et al. 2023

Mathematics

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Printed circuit heat exchangers (PCHEs) are widely used as recuperators in the supercritical carbon dioxide (S-CO2) Brayton cycle design. The variation of heat sources will have a great impact on the heat transfer effect of the recuperator. It is of interest to study the fast calculation of flow and heat transfer performance of PCHEs under different operating conditions to obtain the optimal comprehensive performance and provide guidance for the operation control strategy analysis. Herein, a fast calculation method is established through a one-dimensional model of a PCHE based on Modelica. The effects of working medium mass flow rate and inlet temperature on the flow and heat transfer process are analyzed from the three aspects of heat transfer rate, flow pressure drop, and comprehensive performance, and the mass flow rate matching optimization is realized. The results show that increased mass flow rate increases heat transfer rate and flow pressure drop. The efficiency evaluation coefficient (EEC) has a maximum value at which the mass flow rate values of the cold and hot channels are best matched, and the comprehensive performance is optimal. When the mass flow rate of the heat channel is 4.8 g/s, the maximum EEC is 1.42, corresponding to the mass flow rate of the cold channel, 4.2 g/s. Compared with the design condition, the heat transfer rate increases by 62.1%, and the total pump power increases by 14.2%. When the cold channel inlet temperature increases, EEC decreases rapidly, whereas EEC increases when the hot channel inlet temperature increases. The conclusions can provide theoretical support for the design and operation of PCHEs.

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“…The research shows that the optimization result with the minimum complex function is distributed in the Pareto frontier. Feng et al [ 72 ] obtained the optimal constructal of marine condensers with single-objective optimization and MOO and compared the optimization results of single-objective optimization and three decision methods based on deviation index. Feng et al [ 73 ] used the NSGA-II to perform the constructal design with the minimum EGR and the constructal design with the minimum PPC and compared the optimization results of three decision methods based on the deviation index.…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Constructal Design for Quadrilateral Heat Generation Body with Vein-Shaped High Thermal Conductivity Channel

Zhu

Chen

et al. 2022

Entropy

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Based on the quadrilateral heat generation body (HGB) proposed by previous literature, the multi-objective constructal design is performed. Firstly, the constructal design is performed by minimizing the complex function composed of the maximum temperature difference (MTD) and entropy generation rate (EGR), and the influence of the weighting coefficient (a0) on the optimal constructal is studied. Secondly, the multi-objective optimization (MOO) with the MTD and EGR as optimization objectives is performed, and the Pareto frontier with an optimal set is obtained by using NSGA-II. The optimization results are selected from the Pareto frontier through LINMAP, TOPSIS, and Shannon Entropy decision methods, and the deviation indexes of different objectives and decision methods are compared. The research of the quadrilateral HGB shows that the optimal constructal can be gained by minimizing the complex function with the objectives of the MTD and the EGR, the complex function after the constructal design is reduced by up to 2% compared with its initial value, and the complex function of the two reflects the compromise between the maximum thermal resistance and the irreversible loss of heat transfer. The Pareto frontier includes the optimization results of different objectives, and when the weighting coefficient of a complex function changes, the optimization results obtained by minimizing the complex function will also be distributed in the Pareto frontier. The deviation index of the TOPSIS decision method is 0.127, which is the lowest one among the discussed decision methods.

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Multi-Objective Constructal Optimization for Marine Condensers

Cited by 31 publications

References 97 publications

Multi-Objective Constructal Design for Square Heat-Generation Body with “Arrow-Shaped” High-Thermal-Conductivity Channel

Multi-Objective Constructal Design for Square Heat-Generation Body with “Arrow-Shaped” High-Thermal-Conductivity Channel

Fast Calculation of Supercritical Carbon Dioxide Flow, Heat Transfer Performance, and Mass Flow Rate Matching Optimization of Printed Circuit Heat Exchangers Used as Recuperators

Multi-Objective Constructal Design for Quadrilateral Heat Generation Body with Vein-Shaped High Thermal Conductivity Channel

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