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20 kW Turbine Aerodynamic Design for EP-OTEC System

20 kW EP-OTEC 터빈 공력 설계

  • Received : 2016.07.25
  • Accepted : 2016.11.10
  • Published : 2017.04.01

Abstract

In the present study, 20 kW turbine for OTEC with a ejector and a motive pump is designed and performance prediction is implemented by means of CFD. The meridional analysis for initial geometry and CFD for detail design are used to design the turbine. This turbine has about 90.9% efficiency and 28.47 kW power at 15,000 rpm and pressure ratio of 1.53. Homogeneous mixture model is used because two phase flow can be occurred in the turbine. Performance evaluation is carried out and then results are presented by plotting of power, mass flow rate and efficiency as varying pressure ratio and rotational speed.

Keywords

References

  1. Nihous, G. C., 2007, "A preliminary assessment of ocean thermal energy conversion resources," Journal of Energy Resources Technology, Vol. 129, No.1, pp. 10-17. https://doi.org/10.1115/1.2424965
  2. Rajagopalan, K. and Nihous, G. C., 2013, "Estimates of global Ocean Thermal Energy Conversion (OTEC) resources using an ocean general circulation model," Renewable Energy, Vol. 50, pp. 532-540. https://doi.org/10.1016/j.renene.2012.07.014
  3. Oh, C. and Song, Y. U., 2012, "A Optimization of the ORC for Ship's Power Generation System," Journal of Navigation and Port Research, Vol. 36, No. 5, pp. 349-355. https://doi.org/10.5394/KINPR.2012.36.5.349
  4. Tchanche, B. F., Loonis, P., Petrissans, M., and Ramenah, H., 2013, "Organic Rankine cycle systems Principles, opportunities and challenges. In Microelectronics (ICM)," 2013 25th International Conference on IEEE. pp. 1-4.
  5. Uehara, H., Dilao, C. O., and Nakaoka, T., 1988, "Conceptual design of ocean thermal energy conversion (OTEC) power plants in the Philippines," Solar energy, Vol. 41, No. 5, pp. 431-441. https://doi.org/10.1016/0038-092X(88)90017-5
  6. Straatman, P. J. and van Sark, W. G., 2008, "A new hybrid ocean thermal energy conversion-Offshore solar pond (OTEC-OSP) design: A cost optimization approach," Solar Energy, Vol. 82, No. 6, pp. 520-527. https://doi.org/10.1016/j.solener.2007.12.002
  7. Bombarda, P., Invernizzi, C., and Gaia, M., 2013, "Performance analysis of OTEC plants with multilevel organic Rankine cycle and solar hybridization." Journal of Engineering for Gas Turbines and Power, Vol. 135, No. 4, 042302. https://doi.org/10.1115/1.4007729
  8. Kim, N. J., Ng, K. C., and Chun, W., 2009, "Using the condenser effluent from a nuclear power plant for Ocean Thermal Energy Conversion (OTEC)," International Communications in Heat and Mass Transfer, Vol. 36, No. 10, pp. 1008-1013. https://doi.org/10.1016/j.icheatmasstransfer.2009.08.001
  9. Drescher, U. and Bruggemann, D., 2007, "Fluid selection for the Organic Rankine Cycle (ORC) in biomass power and heat plants," Applied Thermal Engineering, Vol. 27, No. 1, pp. 223-228. https://doi.org/10.1016/j.applthermaleng.2006.04.024
  10. Wang, S. K. and Hung, T. C., 2010, "Renewable energy from the sea-organic Rankine Cycle using ocean thermal energy conversion. In Energy and Sustainable Development: Issues and Strategies (ESD)," 2010 Proceedings of the International Conference on IEEE. pp. 1-8
  11. Yoon, J. I., Son, C. H., Baek, S. M., Kim, H. J., and Lee, H. S., 2014, "Efficiency comparison of subcritical OTEC power cycle using various working fluids," Heat and Mass Transfer, Vol. 50, No. 7, pp 985-996. https://doi.org/10.1007/s00231-014-1310-8
  12. Yang, M. H. and Yeh, R. H., 2014, "Analysis of optimization in an OTEC plant using organic Rankine cycle," Renewable Energy, Vol. 68, pp. 25-34. https://doi.org/10.1016/j.renene.2014.01.029
  13. Sami, S. M., 2012, "ORC for low temperature power generation with low GWP refrigerants," International Journal of Ambient Energy, Vol.33, No. 1, pp. 2-8. https://doi.org/10.1080/01430750.2011.626945
  14. Yoon, J. I., Son, C. H., Seol, S. H., Kim, H. U., Ha, S. J., Jung, S. H., ... and Lee, H. S., 2015, "Performance analysis of OTEC power cycle with a liquid-vapor ejector using R32/R152a," Heat and Mass Transfer, Vol. 51, No. 11, pp. 1597-1605. https://doi.org/10.1007/s00231-015-1526-2
  15. R134a, R152a, R32 MSDS available at https://www.airgas.com/, ODP, GWP available at http://www.engineeringtoolbox.com/Refrigerants-Environment-Properties-d_1220.html
  16. Chen, H. and Baines, N. C., 1994, "The aerodynamic loading of radial and mixed-flow turbines," International journal of mechanical sciences, Vol. 36, No. 1, pp. 63-79. https://doi.org/10.1016/0020-7403(94)90007-8
  17. Han, S. J. and Seo, J. B., 2014, "20 kW Turbine development for OTEC system," The KSFM Journal of Fluid Machinery, Vol. 17, No. 6, pp. 39-43.

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