| 摘要: |
| 风速分布对翅片管换热器性能影响较大。在换热器结构尺寸、空气进口状态一定的条件下，本文对三种典型风速分布时翅片管换热器的流程形式进行了仿真优化与实验研究。结果表明：在上三角和中三角两种风速分布形式下，优化后制冷量分别提高了10.3%、3%；对上三角优化形式研究表明，高风速区是改善换热效果的重点区域；在制冷量相同的情况下，上三角优化形式使系统COP提高8%左右。搭建实验台对仿真结果进行了验证，结果表明模拟值和实验值相对误差均控制在5%以内。 |
| 关键词: 翅片管换热器 不均匀风速 优化分析 实验验证 |
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| An Optimized Design and Experimental Research on Finned-tube Evaporator with Nonuniform Air Distribution |
| Wang Qiang,Liu Yanlong,Liu Zuyi,Dai Xican |
| (School of Thermal Engineering，Shandong Jianzhu University;Shandong Electric Power Engineering Consulting Institute Co.,Ltd.;China Wuzhou Engineering Group Co., Ltd.;Dezhou Zhongao Air Conditioning Equipment Co., Ltd.) |
| Abstract: |
| Airflow distribution has significant impact on the performance of finned-tube evaporator. Simulation optimization and experimental study were carried out of fin-tube heater exchange flow path form with three typical air velocity distributions, when the heat exchanger structure size and inlet air state were under certain conditions. The optimization demonstrates that the capacity is increased by 10.3%, 3% under upper-triangular and middle-triangular air distribution. The analysis on upper-triangular optimized form show that the high air velocity profile is the key of improving heat transfer performance, and the COP is increased about 8% with upper-triangular air distribution. An experimental rig was built and verification was carried out. The results showed that relative error was in 5%, which indicates that the optimized and experimental results are basically consistent. |
| Key words: finned-tube evaporator nonuniform air distribution optimization and analysis experimental research |
