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In-tube performance evaluation of an air-cooled condenser with liquid–vapor separator

Author

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  • Zhong, Tianming
  • Chen, Ying
  • Hua, Nan
  • Zheng, Wenxian
  • Luo, Xianglong
  • Mo, Songping

Abstract

This study evaluates the thermal hydraulic performance of a novel liquid–vapor separation condenser (LSC). A series of experiments was performed to investigate the in-tube heat transfer coefficient and pressure drop of the LSC with varying average refrigerant quality at constant mass flux. The results were compared with the performance of a serpentine condenser (SC) and a parallel-flow condenser (PFC), with R134a as the refrigerant. Findings showed a very small change in the wall temperature of the LSC. The LSC had the lowest average condensation heat transfer coefficient among the three condensers at lower heat flux, but exceeded that of the PFC at higher heat flux. The pressure drop of the LSC was 77.1–81.4% lower than that of the SC and 57.5–64.6% lower than that of the PFC at a heat flux of 6.45kWm−2. Moreover, heat flux and condensing temperature had little influence on the pressure drop of the LSC. Based on these experimental data, the three evaluation criteria (friction power ratio, penalty factor, and minimum entropy generation number) applied to the three condensers proved that the LSC had the best thermal hydraulic performance. The lowest irreversibility of the LSC resulted from the entropy generation rate of the refrigerant side, which was the lowest among the three condensers.

Suggested Citation

  • Zhong, Tianming & Chen, Ying & Hua, Nan & Zheng, Wenxian & Luo, Xianglong & Mo, Songping, 2014. "In-tube performance evaluation of an air-cooled condenser with liquid–vapor separator," Applied Energy, Elsevier, vol. 136(C), pages 968-978.
    • Handle: RePEc:eee:appene:v:136:y:2014:i:c:p:968-978
    DOI: 10.1016/j.apenergy.2014.07.032
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    References listed on IDEAS

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    1. Hua, Nan & Chen, Ying & Chen, Erxiong & Deng, Lisheng & Zheng, Wenxian & Yang, Zhen, 2013. "Prediction and verification of the thermodynamic performance of vapor–liquid separation condenser," Energy, Elsevier, vol. 58(C), pages 384-397.
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    Cited by:

    1. Luo, Xianglong & Wei, Youxing & Qiu, Guanfu & Liang, Yingzong & Chen, Jianyong & Yang, Zhi & Wang, Chao & Chen, Ying, 2020. "Simultaneous design and off-design operation optimization of a waste heat-driven organic Rankine cycle using a multi-period mathematical programming method," Energy, Elsevier, vol. 213(C).
    2. Luo, Xianglong & Yi, Zhitong & Zhang, Bingjian & Mo, Songping & Wang, Chao & Song, Mengjie & Chen, Ying, 2017. "Mathematical modelling and optimization of the liquid separation condenser used in organic Rankine cycle," Applied Energy, Elsevier, vol. 185(P2), pages 1309-1323.
    3. Li, Jian & Liu, Qiang & Duan, Yuanyuan & Yang, Zhen, 2017. "Performance analysis of organic Rankine cycles using R600/R601a mixtures with liquid-separated condensation," Applied Energy, Elsevier, vol. 190(C), pages 376-389.
    4. Li, Jian & Hu, Shuozhuo & Yang, Fubin & Duan, Yuanyuan & Yang, Zhen, 2019. "Thermo-economic performance evaluation of emerging liquid-separated condensation method in single-pressure and dual-pressure evaporation organic Rankine cycle systems," Applied Energy, Elsevier, vol. 256(C).
    5. Li, Jian & Liu, Qiang & Ge, Zhong & Duan, Yuanyuan & Yang, Zhen & Di, Jiawei, 2017. "Optimized liquid-separated thermodynamic states for working fluids of organic Rankine cycles with liquid-separated condensation," Energy, Elsevier, vol. 141(C), pages 652-660.

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