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换热器面积对双蒸发温度空调系统性能影响的模拟研究
翁文兵, 罗诗雨, 白俊武
0
(上海理工大学环境与建筑学院)
摘要:
建立了双蒸发温度空调系统仿真模型来研究改变换热器面积对系统性能的影响。搭建了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1 000 m3/h,压缩机频率为30 Hz,换热器面积从48盘管增至60盘管、72盘管时,Qs的增幅分别为9.8%和13.8%,表明换热器面积增至60盘管时Qs增长效果显著,再增加换热器面积,Qs虽有所增大但增幅放缓。最后提出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:
Simulation Study on the Effect of Heat Exchanger Area on the Performance of Dual Evaporatingon Temperature Air Conditioning System
Weng Wenbing, Luo Shiyu, Bai Junwu
(School of Environment and Architecture,University of Shanghai for Science and Technology)
Abstract:
In response to the issue of heat exchanger design in a dual evaporating temperature air conditioning system, in this study, a simulation model is established for a dual evaporating temperature air conditioning system to evaluate the impact of the heat exchanger area on the system performance. A dual evaporating temperature air-conditioning system experimental platform is built, and the compressor frequency (30–120 Hz) and supply air volumetric flow rate (400–1000 m3/h) under experimental conditions are used to obtain the cooling capacity Qc, sensible heat cooling capacity Qs, and sensible heat ratio (SHR) of the air-conditioning unit. These performance metrics are used to verify the accuracy of the established model. The range of the system operation adjustment is studied by changing the heat exchanger area (48, 60, and 72 coils) in the model. The results show that with an increase in the heat exchanger area, the adjustment ranges of systems Qc, Qs, and SHR expand generally, with maximum increases of 5.0%, 13.8%, and 11.8%, respectively. When the heat exchange area increased from 48 to 60 coils and 72 coils, at an air supply volumetric flow rate of 1000 m3/h and the compressor frequency of 30 Hz, the increase in Qs was 9.8% and 13.8%, respectively, indicating that when the heat exchange area increased to 60 coils, the increase in Qs was obvious. When the heat exchange area was further increased, although Qs increased, the growth rate decreased. Finally, a method was 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:  dual evaporating temperature  sensible heat ratio  refrigeration capacity  independent temperature and humidity control

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