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FSAE Aerodynamic Design Based on the Rear Layout of the Radiator and Targeted Improvement of the cooling system

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FSAE Aerodynamic Design Based on the Rear Layout of the Radi...

2021中国汽车工程学会年会暨展览会

作者： Wang Da Zhou Fuqiu Gu Leqi Huang Yuanxin Shan Yuchen Yang Mingjia Wang Miaoxin Zhang Yuqi College of Automotive Engineering Jilin University

Taking the Formula Student racing car as the research object,and taking Jilin University Gspeed Formula Racing Team’s racing cars as examples,while using the new powertrain layout,a series of improvements are explored towards how to maximize the use of the engine cooling system withitbeing rear-mounted,to change the design ideas of the vehicle’s aerodynamics accordingly,and to optimize the aerodynamics of each part of the *** results show that in the case of the rear-mounted engine cooling system,the design ideas of aerodynamic devicesarequite different from the ideas before the *** aerodynamic devices designed under the new idea have significantly improved the overall performance of the vehicle,which results in a 4% improvement on standard lap time.

关键词： FSAE aerodynamics cooling system rear radiator

Experimental Research of Thermostat Diagnosis for Light Vehicle cooling system

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Experimental Research of Thermostat Diagnosis for Light Vehi...

2021中国汽车工程学会年会暨展览会

作者： Li Hai Liu Yongjun Li Hualong Dongfeng Motor Co. Ltd.Dongfeng Nissan Passenger Vehicle Company Technical Center

China’ s 6 th emission standard（N6） has required OBD system should monitor whether the thermostat is working properly,compared to Emission regulation *** this paper,a strategy of thermostat diagnosis was introduced and experimental research of thermostat diagnosis development was executed from three aspects of performance test,vehicle verification,and further *** main contents are the development and performance calibration of thermostat diagnosis based on N6,including factors,extreme environmental road tests（high temperature,high altitude,and high cold）,and diagnosis characteristic of thermostat under CLTC condition,which would be adopted in N7 in the *** diagnosis performance developer could fully understand and coordinates the related factors of thermostat in *** helps to reduce repeated calibration during the development process and to improve the quality and efficiency of the development.

关键词： thermostat malfunction diagnosis extreme environment road test CLTC cooling system OBD

Simulation and Optimization for an SUV cooling system

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Simulation and Optimization for an SUV Cooling System

2021中国汽车工程学会年会暨展览会

作者： Xu Xiang Zhang Yilun Zhao Feng Yi Hucheng Wang Yuan Xu Junfang CATARC (TianJin) Automotive Engineering Research Institute Co. Ltd

In order to solve the problem that engine coolant outlet temperature of an SUV was too high in low and medium speed climbing and high speed conditions,1 D/3 D co-simulation tool were used to establish a simulation model of whole vehicle cooling *** test and simulation,different factors that affect cooling system thermal balance performance were *** research found out that:Independent cooling loop for transmission and engine can significantly reduce engine coolant outlet *** system pipe arrangement has an influence on coolant flow distribution,but has little influence on coolant *** optimizing radiator type and underhood arrangement,underhood flow field characteristics can be improved and inlet air flow rate of cooling system was *** the cooling system capacity has been improved.

关键词： cooling system thermal balance co-simulation flow distribution flow field optimization

Performance Simulation Study of Vehicle Engine cooling system

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Performance Simulation Study of Vehicle Engine Cooling Syste...

2018中国汽车工程学会年会

作者： LI Xin ZHU Liang ZHU Yongcheng ZENG Zhixin LIU Jujiang Guangzhou Automobile Group Co. Ltd.Automotive Engineering Institute

The cooling system is an important subsystem of the engine,and its performance directly plays a key role in engine *** this paper,the vehicle cooling system model is built up with AMESim,which taken the CFD simulation results of the wind speed field and temperature field as input,to simulate the cooling system under the limit steady-state conditions such as low-speed and high-load,high-speed climbing,and NEDC transient *** can calculate the water temperature rise curve of the transient condition,and balanced water temperature of steady state conditions,and then compared with the test The result verifies the correctness of the cooling system ***,the U-type radiator and the improved I-type radiator of a vehicle model are compared analysis to verify the correctness of the cooling system model,and then to obtain the direction of optimization *** sturdy can make an important application value and theoretical significance to improve the engine cooling system performance.

关键词： cooling system heat transfer coefficient steady state condition NEDC condition optimization design

Energy performance analysis of multi-chiller cooling systems for data centers concerning progressive loading throughout the lifecycle under typical climates

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Building Simulation 2024年第10期17卷 1693-1708页

作者： Yingbo Zhang Hangxin Li Shengwei Wang Department of Building Environment and Energy Engineering The Hong Kong Polytechnic UniversityHong KongChina Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongChina

The increasing demand for cooling energy in data centers has become a global *** studies lack a comprehensive analysis of the energy performance of widely used multi-chiller cooling systems in air-cooled data centers throughout their lifecycle,especially concerning progressive *** bridge this gap,this study conducts a thorough assessment of the energy performance of multi-chiller cooling systems throughout the entire ***,the impact of climate conditions on the energy efficiency of the cooling systems is analyzed,considering design variations for typical ***-chiller cooling system models are developed using the test data of cooling equipment and typical control *** energy performance of the cooling system is thoroughly analyzed under full-range cooling loads and climate *** show that free cooling time could differ up to 1442 hours at different part load ratios in the same ***,the cooling system’s coefficient of performance(COP)varies significantly,by up to 6,at different part load ratios,corresponding to a difference in power usage effectiveness(PUE)up to ***,the average cooling system COP throughout the lifecycle loading is found to be only 11.7,2.9 lower than the design system COP.

关键词： data center cooling system energy performance life-cycle operation power usage effectiveness(PUE) coefficient of performance(COP)

Implementation of cooling systems to Enhance Dairy Cows＇ Microenvironment

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Journal of Environmental Science and Engineering 2011年第12期5卷 1654-1661页

作者： M. Samer Department of Agricultural Engineering Faculty of Agriculture Cairo University Giza 12613 Egypt

A tool was developed to assist the cooling systems designer in designing and installing the microsprinklers and fan cooling system. The tool was developed by integrating a mathematical model into an electronic spark map in order to use the mathematical model practically. The mathematical model was developed using the designs, parameters, variables, and constant values of the microsprinklers and fans cooling system. Subsequently, an electronic spark map （decision tree） was developed, and then the mathematical model was integrated into the electronic spark map. Afterwards, C# （C Sharp） programming language was used to develop a computer system via the electronic spark map, and to make the user interface. The developed computer system assists the designer in making decisions to specify and to calculate the required discharge of cooling system pump, length and diameter of cooling system pipelines, number of cooling fans, and number of microsprinklers. Moreover, this tool calculates the capital investment and the fixed, variable, and total costs of the cooling system. However, the mathematical model of the spark map requires some input data such as： pressure and discharge of microsprinklers, and some other engineering parameters. Data of 4 cooling systems were used to carry out the model validation. The differences between actual and calculated values were determined, and the standard deviations were calculated. The coefficients of variation were between 2.25% and 4.13%.

关键词： cooling system microenvironment computer system mathematical modeling precision livestock farming microsprinkler.

cooling phenomena in blast furnace hearth

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Journal of Iron and Steel Research International 2018年第10期25卷 1010-1016页

作者： Ke-xin Jiao Jian-liang Zhang Zheng-jian Liu Yong Deng Chun-lin Chen School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China CSIRO Mineral Resources Clayton South VIC 3169 Australia State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing 100083 China

cooling water provides the best protection for refractory in the blast furnace hearth. Stable and suitable water quality and abundant cooling water are the basis for long service life of the hearth. Some phenomena about cooling system in the commercial blast furnaces were described, and reasonable explanations of these phenomena were analyzed. The results show that increasing the amount of cooling water and reducing the inlet temperature of cooling water can increase the cooling effect significantly in the case of water scaling. Heat flux in the blast furnace hearth is the average heat flux of cooling stave, and the erosion of carbon brick is uneven. There is no direct connection between the actual erosion condition and the heat flux in the hearth. The change trend of thermocouple temperature and heat flux in the hearth can reflect whether the gaps exist among the bricks or not, providing an effective guidance for industrial production and the evaluation of safety state in the hearth. And, the film boiling will not occur in the normal cooling system in the blast furnace hearth.

关键词： Blast furnace hearth cooling system Heat flux - Film boiling - Scale deposit Air gap

Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

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航空动力学报 2015年第4期30卷 775-783页

作者： CAI Xu LUO Xiang ZHAO Xi XUGuo-qiang CAI Jun National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China Dalian Airforce Department of Information Network Communicaiton Non-Commissioned Office Academy Dalian Liaoning 116600 China Guizhou Aero-Engine Research Institute Aviation Industry Corporation of China Guiyang 550081 China

Experiments were conducted on a typical rotor-stator system where air entered through an annular slot at low radius and flowed out of the cavity axially through a rim seal between the rotor and the *** the seal in this rotor-stator system,the stationary shroud overlapped the rotating *** distributions at the stator surface and flow resistance coefficients of the rotor-stator cavity with a maximum gap of 67mm were measured under different dimensionless mass flow rates from 1.32×104 to 4.87×104 with a large range of rotational Reynolds numbers from 0.418×106 to 2.484×*** results show that pressure on the stator surface decreases with the increase of rotational Reynolds number when the dimensionless mass flow rate is below 1.3×104;when the dimensionless mass flow rate is above 3.034×104,the trend *** is the so-called"pressure inversion effect".However,dimensionless pressure does not show the same changes when rotational dynamic pressure is chosen as the *** resistance coefficient of the rotor-stator cavity is determined by the dimensionless mass flow rate and rotational Reynolds number;for practical application,the resistance coefficient can also be estimated by the turbulent flow parameter in the range of turbulent parameter from 0.1to 1.6.

关键词： cooling system rotor-stator system flow characteristics pressure distribution resistance coefficient

Development and Analysis of a New Cylindrical Lithium-Ion Battery Thermal Management system

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 298-312页

作者： Yasong Sun Ruihuai Bai Jing Ma School of Power and Energy Northwestern Polytechnical UniversityXi’an 710072China Center of Computational Physics and Energy Science Yangtze River Delta Research Institute of NPUNorthwestern Polytechnical UniversityTaicang 215400China School of Automobile Chang’an UniversityXi’an 710064China

With the development of modern technology and economy,environmental protection and sustainable development have become the focus of global *** promotion and development of electric vehicles(EVs)have bright ***,many challenges need to be faced *** diferent operating conditions,various safety problems of electric vehicles emerge one after another,especially the hidden danger of battery overheating which threatens the performance of electric *** paper aims to design and optimize a new indirect liquid cooling system for cylindrical lithium-ion *** design schemes for diferent cooling channel structures and cooling liquid inlet directions are proposed,and the corresponding solid-fuid coupling model is *** Multiphysics simulation software is adopted to simulate and analyze the cooling *** approximate model is constructed using the Kriging method,which is considered to optimize the battery cooling system and improve the optimization *** parameter analysis and the optimization design of system structure are performed through a set of infuencing factors in the battery thermal *** results indicate that the method used in this paper can efectively reduce the maximum core temperature and balance the temperature diferences of the battery *** with the original design,the optimized design,which is based on the non-dominated sorting genetic algorithm(NSGA-II),has an excellent ability in the optimized thermal management system to dissipate thermal energy and keep the overall cooling uniformity of the battery and thermal management ***,the optimized system can also prevent thermal runaway propagation under thermal abuse *** summary,this research can provide some practical suggestions and ideas for the engineering and production applications and structural optimization design carried by electric vehicles.

关键词： cooling system Electric vehicle Kriging approximation Numerical simulation