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过程工程学报 ›› 2019, Vol. 19 ›› Issue (4): 661-667.DOI: 10.12034/j.issn.1009-606X.218313

• 流动与传递 • 上一篇    下一篇

柜式空调微通道蒸发器换热性能测试

鲁进利1*, 刘亚进1, 韩亚芳1, 池帮杰2, 钱付平1   

  1. 1. 安徽工业大学建筑工程学院,安徽 马鞍山 243032 2. 安徽置地投资有限公司,安徽 安庆 246000
  • 收稿日期:2018-10-30 修回日期:2019-01-02 出版日期:2019-08-22 发布日期:2019-08-15
  • 通讯作者: 鲁进利
  • 基金资助:
    基于CFD-DPM相变微胶囊液固两相流时空分布及对流传热特性;低阻高效微尺度换热器对流传热特性研究

Experimental test on heat exchanger performance of air conditioning with microchannel evaporator

Jinli LU1*, Yajin LIU1, Yafang HAN1, Bangjie CHI2, Fuping QIAN1   

  1. 1. School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China 2. Anhui Land Investment Co., Ltd., Anqing, Anhui 246000, China
  • Received:2018-10-30 Revised:2019-01-02 Online:2019-08-22 Published:2019-08-15
  • Contact: LU Jin-li

摘要: 设计并搭建了柜式空调用微通道蒸发器的性能实验测试平台,测试了微通道蒸发器扁管进出口端温度分布及蒸发器进出口温差、压差、输入功率、制冷量和系统能效比随环境舱温度(18~23℃)升高的变化,并与常规管翅式蒸发器进行了对比。结果表明,微通道蒸发器具有较好的制冷剂流量分配特性,提高了空调出风口温度分布均匀性;由于微通道蒸发器制冷剂充注量低于管翅式蒸发器,且流程也相对缩短,相同工况下,微通道蒸发器进出口压差比管翅式蒸发器降低了33.9%,输入功率降低了4.12%,制冷量提升了2.95%,系统能效比最高提高了6.69%。

关键词: 微通道蒸发器, 制冷量, 能效比, 输入功率, 管翅式蒸发器

Abstract: With the advantages of high level of integration, high heat exchange efficiency, and low pressure drop penalty in refrigerant side, the refrigerant charge can be reduced effectively in microchannel evaporator, and the size and weight of heat exchanger also can be reduced, therefore the system energy efficiency can be improved effectively. In this work, an experimental system was designed and set up to research the performance of microchannel evaporators. The inlet and outlet temperature distribution of microchannel flat tube were measured. And the variations of inlet and outlet temperature difference, pressure drop, input power, cooling capacity, coefficient of performance with environmental chamber were also analyzed. In addition, the experimental results were compared with conventional finned-tube evaporators under the conditions of ambient chamber temperature in the range from 18 to 23℃. The experiment results indicated that microchannel evaporator had better distribution behavior of refrigerant and can improve the temperature uniformity of air-condition vent. The pressure drops of microchannel evaporator and finned-tube evaporator increased with the increasing of environmental chamber temperature. As the reason that refrigerant charge of microchannel evaporator was lower than finned-tube evaporator and the refrigerant flow path was also shorter than finned-tube evaporator, the maximum pressure drop between two evaporators was 111 kPa under the same temperature. The average pressure drop penalty of microchannel evaporator was reduced by 33.9% compared to the finned-tube evaporator. The compressor power consumption can be reduced by using microchannel evaporator. The system input power of microchannel evaporator was lower than that of finned-tube evaporator and the maximum value was 4.12%. Compared with finned-tube evaporator, the cooling capacity of microchannel evaporator increased by 2.95% and the system coefficient of performance improved by 6.69% under the same temperature of environmental chamber from 18 to 23℃. Based on the above researches, these experimental results can provide data support for application of microchannel evaporator.

Key words: microchannel evaporator, cooling capacity, coefficient of Performance, input power, finned-tube evaporator