| 摘要: |
| 受限空间翅片管换热器，是指由于总体框架尺寸的限制，部分结构参数被限定的换热器。为研究此类翅片管换热器的在换热传质时的不同特性，基于空调箱中的有限空间结构模型，建立适用于此类换热器计算的集总参数模型。利用二分迭代法求解的结果表明模型可高效精准地计算出翅片管换热器沿气流方向的排数，并且当任意工况参数或者结构参数发生变化时，此模型也可分析预测翅片管换热器的性能变化规律。利用实验数据对模型计算结果进行了对比验证：模型计算所得的各性能参数值与实验值吻合良好，其平均相对误差均小于2%，最大相对误差均小于8%。通过焓差实验台测定和分析翅片管换热器的制冷量和压降随工况参数和结构参数的变化规律，不仅优化换热器的设计，并为换热器运行调节方法的选取提供依据。 |
| 关键词: 受限空间 翅片管换热器 设计模型 性能分析 |
| DOI： |
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| 基金项目: |
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| Performance Analysis on the Fin-tube Heat Exchanger in Limited Space |
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Zhang Jie, Gu Bo, Fang Jihua
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| (School of Mechanical Engineering, Shanghai Jiao Tong University) |
| Abstract: |
| Because of restrictions on the size of the overall framework, heat exchangers with limited structure are called limited heat exchangers. Based on the limited model in air-handling unit, a lumped parameter model was established to study different performance of fin-tube heat exchangers. The dichotomy iteration was employed to solve the model. The results show that the model will not only design and calculate the number of tube rows along the airflow direction, but also analyze and predict the performance of fin-tube heat exchangers with variable condition and structure. The calculated results of the model were verified by the experimental data: the mean relative deviations are lower than 2% and the maximal relative deviations are lower than 8%. Experiments of enthalpy difference were conducted to analyze the heat transfer and friction characteristics of fin-tube heat exchangers with variable parameters, which optimize the design of the heat exchanger and provide the basis for the selection of heat exchanger operation method. |
| Key words: limited space fin-tube heat exchangers design model performance analysis |
