| 摘要: |
| 针对双蒸发温度空调系统在换热器设计方面的问题，本文建立了双蒸发温度空调系统仿真模型来探究改变换热器面积对系统性能的影响。搭建双蒸发温度空调系统实验台，在实验工况下改变压缩机频率(30~120 Hz)和送风量（400~1000 m3/h），得到空调机组总制冷量Qc、总显热制冷量Qs和显热比SHR，验证了所建模型精度。在模型中改变换热器面积（48盘管、60盘管、72盘管）进行系统运行调节范围的研究。结果表明，随着换热器面积的增加，系统Qc、Qs和SHR的调节范围在整体扩大，最大增幅分别为5.0%、13.8%、11.8%。当送风量为1000m3/h，压缩机频率为30Hz，换热面积从48盘管增加至60盘管、72盘管时，Qs的增幅分别为9.8%和13.8%，表明换热面积增加至60盘管时Qs增长效果明显，再增加换热面积，Qs虽有所增大但增幅放缓。最后提出了一种以所需制冷量为目标，依据环境温湿度调节范围设计换热器面积的方法。 |
| 关键词: 双蒸发温度 显热比 制冷量 温湿度独立控制 |
| DOI： |
| 投稿时间：2023-03-23 修订日期：2023-06-08
录用日期：2023-07-31 |
| 基金项目: |
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| Simulation Study on the Effect of Heat Exchanger Area on the Performance of Double Evaporation Temperature Air Conditioning System |
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| Abstract: |
| In response to the issue of heat exchanger design in a dual evaporation temperature air conditioning system, this article establishes a simulation model for the dual evaporation temperature air conditioning system to explore the impact of changing the heat exchanger area on system performance. Build a dual evaporation temperature air conditioning system experimental platform, and change the compressor frequency (30-120 Hz) and supply air volume (400-1000 m3/h) under experimental conditions) ，obtain the cooling capacity Qc, sensible heat cooling capacity Qs, and sensible heat ratio SHR of the air conditioning unit, verifying the accuracy of the established model. Study the range of system operation adjustment by changing the heat exchanger area (48 coils, 60 coils, 72 coils) in the model. The results show that with the increase of the heat exchanger area, the adjustment range of system Qc, Qs, and SHR is overall expanding, with maximum increases of 5.0%, 13.8%, and 11.8%, respectively. When the air supply volume is 1000m3/h, the compressor frequency is 30Hz, and the heat exchange area increases from 48 coils to 60 coils and 72 coils, the increase in Qs is 9.8% and 13.8%, respectively，indicating that when the heat exchange area increases to 60 coils, the increase of Qs is obvious. When the heat exchange area is further increased, although Qs increases, the growth rate slows down. Finally, a method is proposed to design the heat exchanger area according to the ambient temperature and humidity adjustment range, with the required cooling capacity as the target. |
| Key words: double evaporation temperature sensible heat ratio refrigerating capacity independent temperature and humidity control |
