Heat dissipation characteristic in the intake grille and radiator of a fuel cell vehicle

Gong, Chengyuan; Shen, Jun; Yu, Yi; Wang, Kaiqiang; Tu, Zhengkai

doi:10.1080/15435075.2020.1779078

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…The natural ventilation and heat dissipation performance of train suspension equipment have received widespread attention from researchers since the extensive operation of HST. Huang et al 4 compared the scales and patterns of temperature changes in the equipment cabin under different environments; Zhang et al 5 discussed the influence of grille position and shape on cooling performance. The methods used for these issues are mainly wind tunnel tests 6 and CFD simulations.…”

Section: List Of Symbol Gmentioning

confidence: 99%

Numerical simulation and theoretical study on the impact of wind-sand flow of high-speed trains in long tunnel space

Li,

Dong,

et al. 2024

Sci Rep

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When high-speed trains (HST) run in enclosed spaces such as long tunnels, the thermal accumulation of their suspension devices is continuous and cannot be effectively dissipated. In addition, previous experiments or simulations for the heat dissipation of HST in tunnel spaces did not consider the impact of sand. To clarify the impact of HWS-LT on the heat accumulation of HST equipment cabin, this study used the CFD method to numerically simulate the impact of different wind-sand flow concentrations or no-sand wind on the cooling of equipment in the long tunnel space. Firstly, the sand particles in the wind-sand flow gather at the tunnel entrance and enter the equipment cabin with the train as it enters the tunnel. This boundary condition is more in line with actual engineering situations. Secondly, both flows show asymmetric intrusion into the cabin due to the asymmetrical tunnel arrangement, but the sand particles in the wind-sand flow are affected by the vortices and tunnel walls, resulting in more asymmetric flow and some particles being trapped in the grids or filters, leading to outflow ρQ < inflow ρQ. Under the wind-sand flow condition, the temperature of some equipment surfaces shows more significant increases than under the no-sand wind. Finally, contrary to popular perception, the wind-sand flow carrying sand particles can dissipate heat more effectively than no-sand wind, and the higher the volume fraction φ within a certain concentration range, the better the heat dissipation effect. This is because the wind-sand flow has a higher specific heat capacity, which can remove some heat from the contact point between the sand particles and the equipment wall upon contact. The higher sand particle concentration increases the contact frequency and contact area between the sand particles and the equipment wall, and the heat transfer pathway and heat dissipation efficiency are improved.

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Section: List Of Symbol Gmentioning

confidence: 99%

Numerical simulation and theoretical study on the impact of wind-sand flow of high-speed trains in long tunnel space

Li,

Dong,

et al. 2024

Sci Rep

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“…The current research and optimization of thermal management systems mainly focuses on heat dissipation structure, coolant and control strategies. In terms of heat dissipation structure, Gong et al [26] studied the flow and heat transfer characteristics of Roewe 950 and Toyota Mirai (Figure 6). By increasing the area of the intake grille and optimizing the window opening angle of the radiator, the heat transfer coefficient could be improved, where a new windward bending structure was developed to improve the heat transfer rate of the radiator [27].…”

Section: Thermal Management Systemmentioning

confidence: 99%

A Review of Fuel Cell System Technology: From Fuel Cell Stack to System Integration

Ren

Shen²,

Li³

et al. 2022

IJAMM

Self Cite

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Review A Review of Fuel Cell System Technology: From Fuel Cell Stack to System Integration Weiqun Ren 1,*, Jun Shen 2, Xuebing Li 1, and Changqing Du 2 1 Dongfeng Commercial Vehicle Co. Ltd., 10 Dongfeng Avenue, Wuhan, China 2 Wuhan University of Technology, Wuhan, China * Correspondence: renweiqun@tsinghua.org.cn; Tel.: +86-139-1820-4209 Received: 14 October 2022 Accepted: 8 November 2022 Published: 18 December 2022 Abstract: The technology of hydrogen fuel cell vehicles (FCV) is the ultimate direction of clean energy vehicle development, and commercial vehicles are the most important application area for fuel cell commercialization. This paper summarizes the key components, technologies and development trends of the fuel cell stack, fuel cell system and vehicle integration at home and abroad, and points out that key materials (such as bipolar plates and membrane electrodes), key system components (such as air compressors and ejectors), high-power modular integration technologies, and fuel cell control technologies are the main factors influencing the commercialization of FCVs. Particularly, we put the main fouce on variable ejector or multi-stage ejector technology, integrated and optimized control technology, and multi-energy cooperative control technology due to their crucial roles in meeting the industrial development of FCVs in China. Furthermore, some guidance opinions are also provided for reference about the development and industrialization of FCVs.

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“…6 Generally, the character of a thermal control ACC system exists in two main aspects: the outlet cooling character and the inlet intake character. 7,8 Various studies have focused on the outlet cooling characters of the ACC. The numerical simulations have been validated to be available, 9 for example, have been used to examine the outflow characteristics and heat transfer characteristics of impinging holes of a cooling pipe with circular section for the ACC of a low-pressure turbine.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic optimization method of intake grille of active clearance control system for turbines based on modified social spider algorithm (MSSA)

Xie,

Zhang,

Shi

et al. 2024

Advances in Mechanical Engineering

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During the operation of an active clearance control (ACC) system of a turbine, the aerodynamic performance of the intake grille indirectly influences its control. To improve the performance, an aerodynamic optimization method is proposed, consisting of parameterization, an optimization algorithm, and a fitness evaluation. During parameterization, its geometry is represented by seven geometric variables. A modified social spider algorithm is used as the optimization algorithm. To evaluate the aerodynamic performance of the grille, a special fitness function is adopted, obtained using an adaptive topological multi-layer feedforward artificial neural network. To verify the feasibility of this method, experiments and numerical calculations are carried out on the original and optimized intake grilles. The results show that the average intake flow rate and average total pressure recovery coefficient of the optimized grille have increased by 17.3% and 4.9%, respectively.

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Heat dissipation characteristic in the intake grille and radiator of a fuel cell vehicle

Cited by 12 publications

References 23 publications

Numerical simulation and theoretical study on the impact of wind-sand flow of high-speed trains in long tunnel space

Numerical simulation and theoretical study on the impact of wind-sand flow of high-speed trains in long tunnel space

A Review of Fuel Cell System Technology: From Fuel Cell Stack to System Integration

Aerodynamic optimization method of intake grille of active clearance control system for turbines based on modified social spider algorithm (MSSA)

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