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Analysis on optimal working fluid flowrate and unstable power generation for miniaturized ORC systems

  • Geological, Civil, Energy and Traffic Engineering
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Abstract

For efficient utilization of a limited geothermal resource in practical projects, the cycle parameters were comprehensively analyzed by combining with the heat transfer performance of the plate heat exchanger, with a variation of flowrate of R245fa. The influence of working fluid flowrate on a 500W ORC system was investigated. Adjusting the working fluid flowrate to an optimal value results in the most efficient heat transfer and hence the optimal heat transfer parameters of the plate heat exchanger can be determined. Therefore, for the ORC systems, optimal working fluid flowrate should be controlled. Using different temperature hot water as the heat source, it is found that the optimal flowrate increases by 6-10 L/h with 5 °C increment of hot water inlet temperature. During experiment, lower degree of superheat of the working fluid at the outlet the plate heat exchanger may lead to unstable power generation. It is considered that the plate heat exchanger has a compact construction which makes its bulk so small that liquid mixture causes the unstable power generation. To avoid this phenomenon, the flow area of plate heat exchanger should be larger than the designed one. Alternatively, installing a small shell and tube heat exchanger between the outlet of plate heat exchanger and the inlet of expander can be another solution.

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References

  1. HUNG T, SHAI T, WANG S. A review of organic Rankine cycles (ORCs) for the recovery of low-grade waste heat [J]. Energy, 1997, 22: 661–667.

    Article  Google Scholar 

  2. WEI Dong-hong, LU Xue-sheng, LU Zhen, GU Jian-ming. Performance analysis and optimization of organic Rankine cycle (ORC) for waste heat recovery [J]. Energy Conversion and Management, 2007, 48: 1113–1119.

    Article  Google Scholar 

  3. KUO Chi-ron, HSU Sung-wei, CHANG Kai-han, WANG Chi-chuan. Analysis of a 50kW organic Rankine cycle system [J]. Energy, 2011, 36(10): 5877–5885.

    Article  Google Scholar 

  4. DAI Y, WANG J, GAO L. Parametric optimization and comparative study of organic Rankine cycle (ORC) for low grade waste heat recovery [J]. Energy Conversion and Management, 2009, 50(3): 576–582.

    Article  Google Scholar 

  5. HUANG X Y, WANG H Y, WU Z, ZHU T, WU J Z. Selection of working fluids for organic Rankine cycle (ORC) in waste heat power generation system [C]// International Conference on Materials for Renewable Energy and Environment (ICMREE). Beijing: China Academic Journal Electronec Publishing House, 2013: 774–779.

    Google Scholar 

  6. WANG E H, ZHANG H G, FAN B Y, OUYANG M G, ZHAO Y, MU Q H. Study of working fluid selection of organic Rankine cycle (ORC) for engine waste heat recovery [J]. Energy, 2011, 36: 3406–3418.

    Article  Google Scholar 

  7. WANG D Y, PEI G, LI J, LI Y Z, JI J. Analysis of working fluid for organic Rankine cycle [C]// International Conference on Materials for Renewable Energy and Environment. Beijing: China Academic Journal Electronec Publishing House, 2011: 109–114.

    Google Scholar 

  8. DANIËL W, BEN L, WILLIAM D. Comparison of shell-and-tube with plate heat exchangers for the use in low-temperature organic Rankine cycles [J]. Energy Conversion and Management, 2014, 87: 227–237.

    Article  Google Scholar 

  9. HSIEH Y Y, LIN T F. Evaporation heat transfer and pressure drop of refrigerant R-410A flow in a vertical plate heat exchanger [J]. ASME J Heat Transfer, 2003, 125: 852–857.

    Article  Google Scholar 

  10. HSIEH Y Y, LIN T F. Saturated flow boiling heat transfer and pressure drop of refrigerant R-410A in a vertical plate heat exchanger [J]. International Journal of Heat and Mass Transfer, 2002, 45: 1033–1044.

    Article  Google Scholar 

  11. YAN Y Y, LIN T F. Evaporation heat transfer and pressure drop of refrigerant R-134a in a plate heat exchanger [J]. ASME J Heat Transfer, 1999, 121: 118–127.

    Article  Google Scholar 

  12. KHAN T S, KHAN M S, CHYU M C, AYUB Z H. Experimental investigation of evaporation heat transfer and pressure drop of ammonia in a 60°chevron plate heat exchanger [J]. International Journal of Refrigeration, 2012, 35: 336–348.

    Article  Google Scholar 

  13. RUTH S, BRYNHILDUR D, GUÐNI A. Geothermal energy for sustainable development: A review of sustainability impacts and assessment frameworks [J]. Renewable and Sustainable Energy Reviews, 2015, 44: 391–406.

    Article  Google Scholar 

  14. WANG Zhi-qi, LIU Li-wen, XIA Xiao-xia, ZHOU Nai-jun. Dynamic test on waste heat recovery system with organic Rankine cycle [J]. Journal of Central South University, 2014, 21(12): 4607–4612.

    Article  Google Scholar 

  15. LI Tai-lu, ZHU Jia-ling, ZHANG Wei. Performance analysis and improvement of geothermal binary cycle power plant in oilfield [J]. Journal of Central South University, 2013, 20: 457–465.

    Article  Google Scholar 

  16. VLASOGIANNIS P, KARAGIANNIS G, ARGYROPOULOS P, BONTOZOGLOU V. Air–water two-phase flow and heat transfer in a plate heat exchanger [J]. International Journal of Multiphase Flow, 2002, 28: 757–772.

    Article  MATH  Google Scholar 

  17. COLLIER J G. Convective boiling and condensation [M]. 2nd ed. New York: McGraw-Hill, 1982.

    Google Scholar 

  18. SHAH R K, FOCKE W W. Plate heat exchangers and their design theory [M]// Heat Transfer Equipment Design. Washington, DC: Hemisphere, 1988: 227–254.

    Google Scholar 

Download references

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Authors and Affiliations

  1. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, Tianjin, 300072, China

    Ke-tao Liu  (刘克涛), Jia-ling Zhu  (朱家玲), Kai-yong Hu  (胡开永) & Xiu-jie Wu  (吴秀杰)

  2. Tianjin Geothermal Research and Training Center, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, China

    Ke-tao Liu  (刘克涛), Jia-ling Zhu  (朱家玲), Kai-yong Hu  (胡开永) & Xiu-jie Wu  (吴秀杰)

Authors
  1. Ke-tao Liu  (刘克涛)
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  2. Jia-ling Zhu  (朱家玲)
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  3. Kai-yong Hu  (胡开永)
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  4. Xiu-jie Wu  (吴秀杰)
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Corresponding author

Correspondence to Jia-ling Zhu  (朱家玲).

Additional information

Foundation item: Project(2012AA053001) supported by High-tech Research and Development Program of China

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Liu, Kt., Zhu, Jl., Hu, Ky. et al. Analysis on optimal working fluid flowrate and unstable power generation for miniaturized ORC systems. J. Cent. South Univ. 23, 1224–1231 (2016). https://doi.org/10.1007/s11771-016-0372-9

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  • DOI: https://doi.org/10.1007/s11771-016-0372-9

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