基于CFD的汽车小通道冷凝器温度和压降分析

Q3 Engineering
Narhar K. Patil, Dhiresh S. Shastri, Jyoti M. Avhad, Vijay W. Bhatkar
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引用次数: 0

摘要

制冷和空调在家庭和工业供暖、制冷、制冷和通风方面发挥着至关重要的作用,但由于不友好的制冷剂,它们正在造成臭氧层破坏和全球变暖,并消耗了世界能源的33%。冷凝器是含30%制冷剂充注量的蒸汽压缩系统的重要组成部分。多功能一吨制冷系统的设计,开发用于测试不同的冷凝器温度和压力的小通道冷凝器,通过提供人工冷凝器室的三个空气加热器的2.2千瓦的容量,每一个多速冷凝器风扇控制空气速度。因此,由于其特殊的几何形状,提供的通道,有效的冷却和性能系数增加了10到15%,冷凝温度从40到55°C变化,而蒸发温度从-10到+15°C变化,冷凝温度降低了2到3°C。利用ANSYS FLUENT-20 CFD紊流模型,对小通道冷凝器的不同截面(单通道、单管、10个小通道、不同管型的一、二、三、四通道、整个冷凝器在不同进出口温度下的四个通道)进行了计算流体动力学(CFD)仿真,并与实验结果进行了验证。对所有截面的压力和温度计数器进行了研究和绘制。结果表明,沿凝汽器方向的模拟结果与CFD结果的温差均在±15%以内。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Temperature and Pressure Drop Analysis of Automobile Minichannel Condenser using CFD
Refrigeration and air conditioning plays a vital role in domestic and industrial heating, cooling, refrigerating and ventilation but they are contributing to ozone layer depletion and global warming due to unfriendly refrigerants and consume 33% of the world energy. The condenser is an important component of the vapor compression system which contained 30% of the refrigerant charge. The versatile one ton of refrigeration system is designed, developed for testing minichannel condenser for different condenser temperature and pressure by providing artificial condenser compartment with three air heaters of 2.2 kW capacity each with a multispeed condenser fan for controlling air velocity. Thus, the condensation temperature is reduced by 2 to 3°C due to its special geometry, passes provided, efficient cooling and the coefficient of performance increased by 10 to 15% for condensation temperature varying from 40 to 55°C whereas evaporation temperature varies from -10 to +15°C. Computational Fluid Dynamics (CFD) simulation for different sections of the minichannel condenser such as a single minichannel, single tube with 10 minichannels, first, second, third, fourth passes with varying tubes and entire condenser with all four passes for different inlet and exit temperature are performed using ANSYS FLUENT-20 CFD turbulence models and validated with the experimental results. The pressure and temperature counters for all the sections are studied and plotted. It is found that the temperature difference between experimental and CFD results are within ±15% for all the simulations along the condenser.
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来源期刊
International Journal of Vehicle Structures and Systems
International Journal of Vehicle Structures and Systems Engineering-Mechanical Engineering
CiteScore
0.90
自引率
0.00%
发文量
78
期刊介绍: The International Journal of Vehicle Structures and Systems (IJVSS) is a quarterly journal and is published by MechAero Foundation for Technical Research and Education Excellence (MAFTREE), based in Chennai, India. MAFTREE is engaged in promoting the advancement of technical research and education in the field of mechanical, aerospace, automotive and its related branches of engineering, science, and technology. IJVSS disseminates high quality original research and review papers, case studies, technical notes and book reviews. All published papers in this journal will have undergone rigorous peer review. IJVSS was founded in 2009. IJVSS is available in Print (ISSN 0975-3060) and Online (ISSN 0975-3540) versions. The prime focus of the IJVSS is given to the subjects of modelling, analysis, design, simulation, optimization and testing of structures and systems of the following: 1. Automotive vehicle including scooter, auto, car, motor sport and racing vehicles, 2. Truck, trailer and heavy vehicles for road transport, 3. Rail, bus, tram, emerging transit and hybrid vehicle, 4. Terrain vehicle, armoured vehicle, construction vehicle and Unmanned Ground Vehicle, 5. Aircraft, launch vehicle, missile, airship, spacecraft, space exploration vehicle, 6. Unmanned Aerial Vehicle, Micro Aerial Vehicle, 7. Marine vehicle, ship and yachts and under water vehicles.
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