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Analysis of air-cooling Battery Thermal Management System for Formula Student Car

Journal of Transportation Technologies 2021年第3期11卷 436-454页

作者： Leone Martellucci Kodekondla Kalyan Krishna Department of Astronautical Electrical and Energy Engineering Sapienza University Rome Italy

Designing a good energy storage system represents the most important challenge for spreading over a large scale of electric mobility. Proper thermal management is critical and guarantees optimum working temperature in a battery pack. In the various battery thermal management technologies, air cooling is one of the most used solutions. The following work analyzes the cooling performance of the air-cooling thermal management system by choosing appropriate system parameters and analyzes using CFD simulations for accurate thermal modeling. These parameters include the influence of airflow rate and cell spacing on the configuration. The outcome of the simulations is compared using parameters like maximum temperature, and temperature distribution in the battery module to obtain optimum results for further applications. Finally, the simulations of the optimal solution will be compared to experimental results for validation.

关键词： Battery Thermal Management System air-cooling Formula Student

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Research and Demonstration of Direct air-cooling System for 600-MW Fossil-Fired Power Plants

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Electricity 2011年第4期22卷 46-51页

作者： Zhang Xiaolu 1 , Wang Jianping 2 , Hu Zhenling 3 1. China Power Investment Corporation 2. China Power Engineering Consulting Group Corporation 3. Harbin air Conditioning Co., Ltd., China Power Invesment Corpoiation China Power Engineering Harbin air Conditioning Co. Ltd.

Given the distribution feature of resources such as coal and water, the requirements for the development of Chinese power industry, and the fact of monopoly by foreign companies, it is very necessary and significant to independently research and develop air-cooling technologies. Through experimental research, simulative calculation, process and equipment development, field tests and a demonstration project, the design and operation technologies for air-cooling system are grasped and relevant key equipment is developed. The results of the demonstration project show that the technical indicators for the air-cooling system have met or exceeded the design requirements. Part of the research results have been incorporated into the relevant national design standards. The technologies developed have been applied to more than 23 sets of thermal power units of or above 600 MW in China.

关键词： thermal power generating unit air-cooling direct air-cooling project demonstration

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Experimental Investigation of the cooling Capacity of Gaseous Carbon Dioxide in Free Jet Expansion for Use in Portable air-cooling Systems

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Open Journal of Applied Sciences 2018年第2期8卷 62-72页

作者： Chady Al Sayed Ludwig Vinches Stéphane Hallé Department of Mechanical Engineering école de Technologie Supérieure Montreal Canada

This paper investigates the possibility of using the free expansion of gaseous CO2 in portable air-cooling systems. The cooling capacity of the gaseous CO2 free jet expansion was calculated using three different approaches and the results showed that the simplified calculations would give approximated cooling values with an 11.6% maximum error. The mass flow rate, upstream pressure and cooling capacity of the gaseous CO2 decreased with time. A maximum 48.5 watts of cooling was recorded at minute 4 and a minimum value of 10.4 watts at the end of the test. The drop in cooling capacity is due to the evaporation of the liquid CO2 inside the small cylinder which cools the two-phase CO2 mixture and causes a pressure drop (from 6 MPa to 2.97 MPa), which also affects the mass flow rate of gaseous CO2 exiting the orifice (from 0.56 g/s to 0.24 g/s). If this cooling technique is to be considered in portable compact-cooling systems, the mass, pressure and cooling capacity drop with time must be solved. One of the solutions could be to cover the cylinder with a heating coat to compensate for the heat absorbed by the evaporation of the liquid CO2.

关键词： Gaseous CO2 Free Jet Expansion cooling Capacity Compact air-cooling Technique

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Thermal Modeling and cooling Analysis of High-power Lithium Ion Cells

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Journal of Thermal Science 2011年第6期20卷 570-575页

作者： Zhuqian Zhang Li Ji a Nan Zhao Lixin Yang School of Mechanical Electronic and Control Engineering Beijing Jiaotong UniversityNo.3 Shangyuancun Beijing 100044 China

The heat generation model and three-dimensional computational fluid dynamics model for lithium ion cells were established with boundary conditions *** order to provide a better insight about the behaviors of high-power lithium ion cells under realistic discharge conditions,the temperature difference of the cells and an active thermal management system with a pure air-cooling mode were analyzed and predicted with the factors affecting the unevenness of temperature field *** results show a significant effect of the cooling flow rate on the temperature rise of the cells for all discharge *** surface temperatures are relatively uniform at lower discharge rate that makes it easier to control the temperature of the *** temperatures are expected to rise significantly toward the end of discharge and they show non-uniformity at higher discharge *** air flow rate of active cooling is required at high discharge rate and high ambient temperature for practical pack thermal management system.

关键词： Lithium ion battery thermal management system air-cooling temperature rise

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Thermal analysis of the CSNS H^- ion source

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Chinese Physics C 2010年第5期34卷 580-583页

作者：吴小兵欧阳华甫 Institute of High Energy Physics CAS Graduate University of CAS

There are two cooling systems to maintain the thermal stability of the CSNS H^- ion source during its operation： air-cooling in the source body of the discharging chamber and water-cooling in the flange on which the discharging chamber is installed. The optimal cooling parameters to ensure the operation of the H^- ion source are determined through a thermal analysis. In addition, a transient analysis is also performed to know exactly the transient temperature variation during the whole 40 ms period of the pulsed mode operation of the ion source.

关键词： H^- ion source water-cooling air-cooling

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Heat Transfer Characteristics of Square Micro Pin Fins under Natural Convection

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Journal of Electronics cooling and Thermal Control 2014年第3期4卷 59-69页

作者： Naoko Matsumoto Toshio Tomimura Yasushi Koito Department of Advanced Mechanical Systems Kumamoto University Kumamoto Japan

In order to comply with the recent demand for downsizing of the electric equipment, the minia- turization and the improvement in heat transfer performance of a heat sink under natural air-cooling are increasingly required. This paper describes the experimental and numerical investigations of heat sinks with miniature/micro pins and the effect of the pin size, pin height and the number of pins on heat transfer characteristics of heat sinks. Five types of basic heat sink models are investigated in this study. The whole heat transfer area of heat sinks having the different pin size, pin height and the number of pins respectively is kept constant. From a series of experiments and numerical analyses, it has been clarified that the heat sink temperature rises with increase in the number of pins. That is, the heat sink with miniaturized fine pins showed almost no effect on the heat transfer enhancement. This is because of the choking phenomenon occurred in the air space among the pin fins. Reflecting these results, it is confirmed that the heat transfer coefficient reduces with miniaturization of pins. Concerning the effects of the heat transfer area on the heat sink performance, almost the same tendency has been observed in other three series of large surface area, that is, higher pin height. Furthermore as a result of studying non-dimensional convection heat transfer performance, it was found that the relation between the Nusselt number (Nu) and the Rayleight number (Ra) is given by Nu = 0.16 Ra0.52.

关键词： Natural air-cooling Heat Sink Micro Pin Fin Heat Transfer Performance Experiment Numerical Analysis

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