Energy efficient strategies for anti-freezing of air-cooled heat exchanger

Kong, Yanqiang; Wang, Weijia; Yang, Lijun; Du, Xiaoze

doi:10.1016/j.apenergy.2019.114468

Cited by 20 publications

(8 citation statements)

References 34 publications

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“…Effectiveness of the radiator considering it as a cross flow heat exchanger with unmixed fluids in both sides could be calculated as 31,32 ε…”

Section: Objective Functionsmentioning

confidence: 99%

“…Effectiveness of the radiator considering it as a cross flow heat exchanger with unmixed fluids in both sides could be calculated as 31,32 where C r is the heat capacity ratio defined as 33,34 Also, NTU is the number of transfer units defined as 35,36 In equation (4) A and h are heat transfer area and convective heat transfer coefficient, respectively. In this equation, h and c indices represent tube and fin sides, respectively.…”

Section: Mathematical Modelingmentioning

confidence: 99%

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Comprehensive analytical framework for optimal sizing of louvered fin flat tube car radiators

Hadidi

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the present research, a comprehensive analytical framework is proposed for optimal sizing of louvered fin flat tube car radiators. In order to perform optimal sizing, eleven geometric variables, which are all geometric parameters of the radiator, were selected as the design parameters. These variables include large and small diameters of tubes, length and wall thickness of tubes, fins’ pitch, louvers’ pitch on each fin, length of the fin, louver length and height, fin thickness, number of fins and louver angle on fins. The effects of all of these parameters on the cooling capacity and total weight of the radiator are investigated in the form of single objective optimization problems in which cooling capacity should be maximized and total weight of the radiator should be minimized. Using the proposed framework, the cooling capacity of the radiator has increased by about 8.8% compared to the base design. It is shown that some geometric parameters have the opposite effect on objective functions. Therefore, an analytical multi-objective optimization procedure is proposed to satisfy both of the goals, simultaneously. The values of the geometric parameters determined in this paper are more practical in terms of manufacturing than the values suggested in the base design.

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“…Effectiveness of the radiator considering it as a cross flow heat exchanger with unmixed fluids in both sides could be calculated as 31,32 ε…”

Section: Objective Functionsmentioning

confidence: 99%

Section: Mathematical Modelingmentioning

confidence: 99%

Comprehensive analytical framework for optimal sizing of louvered fin flat tube car radiators

Hadidi

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…MS Differential Cost. After implementing DR in the microgrid system, the peak and valley can be cut so that the microgrid's load curve can be smoother and its operation improved [31]. However, it will also affect the system's economic benefits.…”

Section: Multiobjective Optimization Model For Msmentioning

confidence: 99%

Multiobjective Optimization Model considering Demand Response and Uncertainty of Generation Side of Microgrid

Wang

Zhou

et al. 2020

Mathematical Problems in Engineering

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To make better use of renewable power generation, a microgrid system is constructed, containing a multitype power supply and a multienergy storage structure. A multiobjective scheduling optimization model is proposed considering MS differential cost, power abandonment cost, and operation income, and demand response models are introduced to improve the ability of storage and users’ participating in peak shaving. To solve the uncertainty of WPP and PV’s output, the scenario reduction method is adopted, and a single target conversion of multiobjective functions is made through a desion attribute table. The results show that scenario reduction can put a brake on the impact of WPP and PV’s output uncertainty on system dispatch; demand response helps solve the problem of poor matching between the source and load. ESS’s co-operative effect can improve the system’s stability.

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“…In addition, the reaction temperature and the energy density of the all-vanadium battery are too low for industrial development. The organic redox flow battery can solve the above problems easily due to its easy control of active materials, high energy density, wide material sources, and relatively low prices. − Therefore, the organic redox flow battery has become a hot spot in the research of flow batteries in recent years. To improve the performance of the flow battery, a large number of structural design optimization and enhanced transport mechanism research have been carried out. − …”

Section: Introductionmentioning

confidence: 99%

Analysis of Electrode Configuration Effects on Mass Transfer and Organic Redox Flow Battery Performance

Chu

Xiao

et al. 2022

Ind. Eng. Chem. Res.

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For organic redox flow batteries (ORFBs), it is of significance to clarify the influence mechanism of their electrode configuration on the mass transfer inside electrodes and battery performance. A novel three-dimensional (3D) numerical model for ORFBs is established based on the Nernst–Planck and Butler–Volmer theories and is verified by numerous experiments for both the charge and discharge processes. ORFBs equipped with rectangular, trapezoidal, and sector electrodes are investigated, in which the voltage, overpotentials, uniformity factor, and the power efficiency of the discharge process are presented. The results show that the sector electrode possesses the best mass transfer and battery performance. The power-based efficiency of the sector electrode is 1% higher than that of the trapezoidal one. In addition, the opening angle of the sector electrode should be as small as possible. The optimal aspect ratio of the rectangular electrode is 60:107, and the optimal configuration of the trapezoidal electrode is 30 mm top side length and 130 mm bottom side length. The optimization of the porous electrode configuration is presented, which can contribute to the commercial application of ORFBs.

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Energy efficient strategies for anti-freezing of air-cooled heat exchanger

Cited by 20 publications

References 34 publications

Comprehensive analytical framework for optimal sizing of louvered fin flat tube car radiators

Comprehensive analytical framework for optimal sizing of louvered fin flat tube car radiators

Multiobjective Optimization Model considering Demand Response and Uncertainty of Generation Side of Microgrid

Analysis of Electrode Configuration Effects on Mass Transfer and Organic Redox Flow Battery Performance

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