| 摘要: |
| 基于分排参数模型，本文建立了圆柱型翅片管换热器的性能仿真计算模型，对换热器的传热性能进行计算，并进行实验验证。结果表明：制冷量的平均相对误差最大，为6.31%；出风干球温度的平均相对误差最小，为0.61%。计算所得各性能参数与实验值吻合良好。根据仿真模型，对不同制冷工况下的换热器进行计算，研究了循环风量、水质量流量、进风干球温度以及进水温度的变化对换热性能的影响。分析换热器的变工况特性可预测其非设计工况下的换热性能，并换热器的运行工况调节提供依据。 |
| 关键词: 圆柱型翅片管换热器 性能仿真 变工况 |
| DOI： |
| 投稿时间：2018-03-05 修订日期：2018-05-18
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| 基金项目: |
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| Simulation and Analysis of Heat Transfer Performance of Cylindrical Fin-and-Tube Heat Exchanger under Variable Conditions |
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Zeng Weijie, Gu Bo, Li Qianglin
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| (School of Mechanical Engineering, Shanghai Jiao Tong University) |
| Abstract: |
| A performance simulation model of a cylindrical fin-and-tube heat exchanger is established based on a sub-row-parameter model. The model can calculate the heat transfer performance of a heat exchanger based on thermodynamics equations and heat transfer theory. The calculated results of the model, which were verified by experimental data, show that the mean relative deviations of the heat exchange and outlet dry-bulb temperature were 6.31% and 0.61%, respectively, which represent the largest and lowest mean relative deviations. The calculated results agreed well with the experimental data. The performance simulation model was adopted to calculate the performance of the heat exchanger under different cooling conditions. The effects of air volume, water mass flow rate, air inlet dry-bulb temperature, and water inlet temperature on heat transfer performance were investigated. The results of the analysis under variable conditions not only predicted heat transfer performance in off-design conditions but also provided a basis for adjusting the operating conditions of the heat exchanger. |
| Key words: cylindrical fin-and-tube heat exchanger performance simulation variable conditions |
