A Second Law Assessment of Organic Rankine Cycle Depending on Source Temperature
Authors: Kyoung Hoon Kim
Organic Rankine Cycle (ORC) has potential in reducing fossil fuels and relaxing environmental problems. In this work performance analysis of ORC is conducted based on the second law of thermodynamics for recovery of low temperature heat source from 100oC to 140oC using R134a as the working fluid. Effects of system parameters such as turbine inlet pressure or source temperature are theoretically investigated on the exergy destructions (anergies) at various components of the system as well as net work production or exergy efficiency. Results show that the net work or exergy efficiency has a peak with respect to the turbine inlet pressure when the source temperature is low, however, increases monotonically with increasing turbine inlet pressure when the source temperature is high.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1092784Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1427
 K. H. Kim, C. H. Han and K. Kim, "Effects of ammonia concentration on the thermodynamic performances of ammonia-water based power cycles,” Thermochimica Acta, vol. 530, pp. 7-16, 2012
 K. H. Kim, H. J. Ko and K. Kim, "Assessment of pinch point characteristics in heat exchangers and condensers of ammonia-water based power cycles,” Applied Energy, Vol. 113, pp. 970-981, 2014.
 K. H. Kim and C. H. Han, "Analysis of transcritical organic Rankine cycles for low-grade heat conversion,” Adv. Sci. Lett., vol. 8, pp. 216-221, 2012.
 U. Drescher and D. Brueggemann, "Fluid selection for the organic Rankine cycle (ORC) in biomass power and heat plants,” App. Therm. Eng., vol. 27, pp. 223-228, 2007.
 T. C. Hung, S. K. Wang, C. H. Kuo, B. S. Pei, and K. F. Tsai, "A study of organic working fluids on system efficiency of an ORC using low-grade energy sources,” Energy, vol. 35, pp. 1403-1411, 2010.
 A. Schuster, S. Karellas, and H. Splithoff, "Energytic and economic investigation of innovative Organic Rankine Cycle applications,” App. Therm. Eng., vol. 29, pp. 1809-1817, 2008.
 F. Heberle and D. Brueggemann, "Exergy based fluid selection for a geothermal organic Rankine cycle for combined heat and power generation, App. Therm. Eng., vol. 30, pp. 1326-1332, 2010.
 Y. Dai, J. Wang, and L. Gao, "Parametric optimization and comparative study of organic Rankine cycle (ORC) for low grade waste heat recovery,” Energy Convs. Mgmt., vol. 50, pp. 576-582, 2009.
 B. F. Tchanche, G. Papadakis, and A. Frangoudakis, "Fluid selection for a low-temperature solar organic Rankine cycle," App. Therm. Eng. vol. 29, pp. 2468-2476, 2009.
 T. Ho, S. S. Mao and R. Greif, "Comparison of the Organic Flash Cycle (OFC) to other advanced vapor cycles for intermediate and high temperature waste heat reclamation and solar thermal energy,” Energy, vol. 42, pp. 213-223, 2012.
 T. Ho, S. S. Mao and R. Greif, "Increased power production through enhancements to the Organic Flash Cycle (OFC),” Energy, vol. 45, pp. 686-695, 2012.
 A. Bejan, G. Tsatsaronis and M. Moran, "Thermal design and optimization,” John Wiley & Sons, 1996.
 K. H. Kim, H. J. Ko and H. Perez-Blanco, "Exergy analysis of gas-turbine systems with high fogging compression,” Int. J. Exergy, vol. 8, pp. 16-32, 2011.
 K. H. Kim and K. Kim, "Exergy analysis of overspray process in gas turbine systems,” Energies, vol. 5, pp. 2745-2758, 2012.
 K. H. Kim, C. H. Han and K. Kim, "Comparative Exergy Analysis of Ammonia-Water based Rankine Cycles with and without Regeneration,” Int. J. Exergy, in press, 2013.
 T. Yang, G. J. Chen, and T. M. Guo, "Extension of the Wong- Sandler mixing rule to the three-parameter Patel-Teja equation of state: Application up to the near-critical region,” Chem. Eng. J. vol. 67, pp. 27-36, 1997.
 J. Gao, L. D. Li, Z. Y. Zhu, and S. G. Ru, "Vapor-liquid equilibria calculation for asymmetric systems using Patel-Teja equation of state with a new mixing rule,” Fluid Phase Equilibria, vol. 224, pp. 213- 219, 2004.
 C. L. Yaws, Chemical properties handbook, McGraw- Hill, 1999.