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首页> 外文期刊>Heat Transfer Engineering >An Investigation of the Potential of Improving an R1234yf Parallel Flow Condenser Performance Using Modeling and Hybrid Procedure of the Modified NSGA-Ⅱ and TOPSIS
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An Investigation of the Potential of Improving an R1234yf Parallel Flow Condenser Performance Using Modeling and Hybrid Procedure of the Modified NSGA-Ⅱ and TOPSIS

机译：利用改进的NSGA-Ⅱ和TOPSIS的建模和混合程序研究提高R1234yf平行流冷凝器性能的潜力

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摘要

In recent years, compact heat exchangers have been used widely to increase the performance of automotive air conditioning systems. In the present work, a R1234yf parallel flow condenser is optimized to investigate the potential of performance improvement without changing the condenser dimensions including length, width, and depth. To achieve this aim, a one-dimensional finite element model is developed to predict the parallel flow condenser performance. The developed model is then used for optimization procedure after validating by the experimental data. The modified NSGA-II approach is applied to maximize heat transfer rate and minimize entropy generation number, refrigerant pressure drop, and air pressure drop as the objective functions. The non-dominated optimum design points are then plotted and trade-off optimum points are obtained using the technique for order of preference by similarity to ideal solution. Hydraulic diameter and flat tube arrangement are the most important design parameters in an independent two-objective optimization of heat transfer rate and refrigerant pressure drop and the optimized design variables result in heat transfer rate increase of about 1.4% and refrigerant pressure drop reduction of about 80.6%. However, the outcome of considering heat transfer rate as the only objective function is 5.2% increment in heat transfer rate. Such design points unveil significant optimum design principles that can be obtained only by using a multi-objective optimization approach.
机译：近年来，紧凑型热交换器已被广泛用于提高汽车空调系统的性能。在当前工作中，对R1234yf平行流冷凝器进行了优化，以研究在不改变冷凝器尺寸（包括长度，宽度和深度）的情况下提高性能的潜力。为了达到这个目的，开发了一个一维有限元模型来预测平行流冷凝器的性能。经过实验数据验证后，将开发的模型用于优化程序。修改后的NSGA-II方法可用于最大程度地提高传热速率，并最大程度地减少熵产生数，制冷剂压降和空气压降。然后绘制非支配的最佳设计点，并使用与理想解决方案相似的优先顺序，使用该技术获得折衷的最佳点。在传热率和制冷剂压降的独立两目标优化中，水力直径和扁平管布置是最重要的设计参数，并且优化的设计变量导致传热率增加约1.4％，制冷剂压降减少约80.6 ％。但是，将传热速率作为唯一目标函数的结果是传热速率增加了5.2％。这些设计要点揭示了重要的最佳设计原则，这些原则只有通过使用多目标优化方法才能获得。

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  • 来源
    《Heat Transfer Engineering》 |2018年第16期|1405-1422|共18页
  • 作者

    Shojaeefard Mohammad Hassan; Zare Javad;

  • 作者单位

    Iran Univ Sci & Technol Sch Mech Engn Tehran Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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