Experimental Study on Heat Transfer Performance and Pressure Drop of Microchannel Liquid Separation Condenser

QIAN Puchi; WANG Dechang; SONG Qinglu; ZHOU Sai; YAN Zhijian

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Experimental Study on Heat Transfer Performance and Pressure Drop of Microchannel Liquid Separation Condenser

更新时间：2025-01-17

- Experimental Study on Heat Transfer Performance and Pressure Drop of Microchannel Liquid Separation Condenser
- Journal of refrigeration (2025)
- 作者机构：
  
  1.青岛大学机电工程学院,山东省青岛市266071
  2.海信冰箱有限公司,山东省青岛市266071
- 作者简介：
- 基金信息：
  
  the National Natural Science Foundation of China(52106016)
- DOI：
  CLC： TB657.5;TK124
- Received：20 September 2024，
  
  Revised：03 December 2024，
  
  Accepted：06 December 2024，
- 稿件说明：
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QIAN Puchi, WANG Dechang, SONG Qinglu, et al. Experimental Study on Heat Transfer Performance and Pressure Drop of Microchannel Liquid Separation Condenser[J/OL]. Journal of refrigeration, 2025.
DOI：

QIAN Puchi, WANG Dechang, SONG Qinglu, et al. Experimental Study on Heat Transfer Performance and Pressure Drop of Microchannel Liquid Separation Condenser[J/OL]. Journal of refrigeration, 2025. DOI：

摘要

制冷剂质量流量1g/s以下的低质量流量下分液孔的大小和位置对分液冷凝器的性能有重要影响。对R600a在5种不同微通道分液冷凝器内的换热性能和压降进行了实验研究，对不同制冷剂质量流量、入口空气温度和速度、冷凝压力下5种分液冷凝器的换热性能和压降特性进行分析。根据实验结果，第二隔板开孔分液冷凝器换热性能优于第三隔板开孔分液冷凝器。制冷剂质量流量越大，分液冷凝器制冷剂侧压降减小越明显。制冷剂质量流量为0.6 g/s时，第二隔板开孔分液冷凝器制冷剂侧压降较未分液冷凝器降低21.28%；为0.4 g/s时，第二隔板开孔分液冷凝器制冷剂侧压降较未分液冷凝器降低17.29%。利用综合评价因子

比较了不同开孔直径分液冷凝器的性能，分液孔径1.2 mm的分液冷凝器平均

值为1.58，在所有分液冷凝器中最高，综合性能最好。

Abstract

The size and location of theseparating holes at low mass flow rates below 1 g/s have a significant impacton the performance of the liquid separation condenser. The heat transferperformance and pressure drop of R600a in five different microchannel liquidseparation condensers were experimentally studied

and the heat

transferperformance and pressure drop characteristics of five liquid separationcondensers under different refrigerant mass flow

inlet air temperature andvelocity

and condensing pressure were analyzed. According to the experimental results

the heat exchangeperformance of the second partition open-hole separating condenser is higherthan that of the third separator open-hole separating condenser. As the mass flow rate of therefrigerant increases

the refrigerant side pressure drop of the liquidseparation condenser decreases more significantly. When the refrigerant massflow rate is 0.6 g/s

the refrigerant side pressure drop of the secondseparator liquid separation condenser is 21.28% lower than that of the parallelflow condenser

and when the refrigerant mass flow rate is 0.4 g/s

the refrigerantside pressure drop of the second separator liquid separation condenser is17.29% lower than that of the parallel flow condenser. The performance of the liquidseparation condenser with different open-hole diameters was compared by usingthe comprehensive evaluation factor

the average

value of the liquid separation condenser with a separating hole size of 1.2 mm is 1.58

which is the highest among all liquid separation condensers and has the bestcomprehensive performance.

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Keywords

references

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