Constructal design of a cooling channel with semi-circular sidewall ribs in a rectangular heat generation body

Sun, Kun; Feng, Huijun; Chen, Lingen; Ge, Yanlin

doi:10.1016/j.icheatmasstransfer.2022.106040

Cited by 17 publications

(3 citation statements)

References 47 publications

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“…Feng et al [53] performed MOO for a compound heat-dissipation channel, taking the MTD and the pumping power consumption as objectives. Sun et al [54] performed MOO for a cooling channel with semi-circular sidewall ribs, taking the MTD and the pumping power consumption as objectives. Kalkan et al [55] performed MOO for a microchannel cooling plate.…”

Section: Physical Modelmentioning

confidence: 99%

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%

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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“…Rectangular channels (RCs) with high heat-transfer efficiency and small size have been widely used in small reactors [ 1 ], compact heat exchangers [ 2 ], and various electronic products [ 3 ]. In particular, the gas–liquid two-phase mixing process in rectangular channels involves chemical engineering [ 4 ], power engineering [ 5 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Identifying Flow Patterns in a Narrow Channel via Feature Extraction of Conductivity Measurements with a Support Vector Machine

Yang

Wang

et al. 2023

Sensors

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In this work, a visualization experiment for rectangular channels was carried out to explore gas–liquid two-phase flow characteristics. Typical flow patterns, including bubble, elastic and mixed flows, were captured by direct imaging technology and the corresponding measurements with fluctuation characteristics were recorded by using an electrical conductivity sensor. Time-domain and frequency-domain characteristics of the corresponding electrical conductivity measurements of each flow pattern were analyzed with a probability density function and a power spectral density curve. The results showed that the feature vectors can be constructed to reflect the time–frequency characteristics of conductivity measurements successfully by introducing the quantized characteristic parameters, including the maximum power of the frequency, the standard deviation of the power spectral density, and the range of the power distribution. Furthermore, the overall recognition rate of the four flow patterns measured by the method was 93.33% based on the support vector machine, and the intelligent two-phase flow-pattern identification method can provide a new technical support for the online recognition of gas–liquid two-phase flow patterns in rectangular channels. It may thus be concluded that this method should be of great significance to ensure the safe and efficient operation of relevant industrial production systems.

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“…In the engineering field, constructal theory [14][15][16][17][18][19][20][21][22][23][24][25][26] provides a new idea for the optimal design of various transfer systems. For power plants, this theory has been used in the structure optimizations of boilers [27][28][29][30][31], evaporators [32][33][34][35], condensers [36][37][38][39], regenerators [40,41], turbines [42][43][44][45][46][47] and whole systems [48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of a Dual-Pressure Steam Turbine for Rankine Cycle Based on Constructal Theory

et al. 2022

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A one-dimensional dual-pressure steam turbine (ST) model for the marine Rankine cycle is built in this paper. Based on constructal theory, the optimal design of the dual-pressure ST is performed with a fixed total volume of the high- and low-pressure STs. The total power output (PO) of the dual-pressure ST is maximized. Seventeen parameters, including the dimensionless average diameters (DADs) of the stages, steam inlet angles (SIAs) of the stages, average reaction degrees (ARDs) of the stages, and volume ratio of the high-pressure ST are taken as optimization variables. The optimal structure parameters of the stages are gained. It reveals that the total PO of the dual-pressure ST is increased by 2.59% by optimizing the average diameter of the Curtis stage, and the change in the total PO is not obvious by optimizing the average diameter of the third stage of the low-pressure ST. Both the total PO and the corresponding efficiency of the dual-pressure ST are increased by 10.8% after simultaneously optimizing 17 variables with the help of the Matlab optimization toolbox. The novelty of this paper is introducing constructal theory into turbine performance optimization by varying seventeen structure, thermal and flow parameters, and the result shows that the constructal optimization effect is remarkable. Optimal designs of practical STs can be guided by the optimization results gained in this paper.

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Constructal design of a cooling channel with semi-circular sidewall ribs in a rectangular heat generation body

Cited by 17 publications

References 47 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

Identifying Flow Patterns in a Narrow Channel via Feature Extraction of Conductivity Measurements with a Support Vector Machine

Optimal Design of a Dual-Pressure Steam Turbine for Rankine Cycle Based on Constructal Theory

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