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Entropy Generation Analysis of Heat Recovery Vapor Generator for Ammonia-Water Mixture

Authors: Kyoung Hoon Kim, Chul Ho Han


This paper carries out a performance analysis based on the first and second laws of thermodynamics for heat recovery vapor generator (HRVG) of ammonia-water mixture when the heat source is low-temperature energy in the form of sensible heat. In the analysis, effects of the ammonia mass concentration and mass flow ratio of the binary mixture are investigated on the system performance including the effectiveness of heat transfer, entropy generation, and exergy efficiency. The results show that the ammonia concentration and the mass flow ratio of the mixture have significant effects on the system performance of HRVG.

Keywords: Exergy, Entropy, ammonia-water mixture, heat exchanger

Digital Object Identifier (DOI):

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[1] A. B. Little and S. Garimella, "Comparative assessment of alternative cycles for waste heat recovery and upgrade,” Energy, vol. 36, pp. 4492-4504, 2011.
[2] C. Zamfirescu and I. Dincer, "Thermodynamic analysis of a novel ammonia–water trilateral Rankine cycle,” Thermochimica Acta, vol. 477, pp. 7-15, 2008.
[3] A. Khaliq, "Exergy analysis of gas turbine trigeneration system for combined production of power and heat and refrigeration,” Int. J. Refrig., vol. 32, pp. 534-545, 2009.
[4] O. M. Ibrahim, "Design consideration for ammonia–water Rankine cycle,” Energy, vol. 21, pp. 835-841, 1996.
[5] M. Jonsson and J. Yan, "Ammonia–water bottoming cycles: a comparison between gas engines and gas diesel engines as prime movers,” Energy, vol. 26, pp. 31-44, 2001.
[6] V. A. Prisyazhniuk, "Alternative trends in development of thermal power plant,” Appl. Therm. Eng., vol. 28, pp. 190-194, 2008.
[7] N. Kiani, A. Akisawa, and T. Kashiwagi, "Thermodynamic analysis of loadleveling hyper energy converting and utilization system,” Energy, vol. 33, pp. 400-409, 2008.
[8] P. Roy, M. Désilets, N. Galanis, H. Nesreddine, and E. Cayer, "Thermodynamic analysis of a power cycle using a low-temperature source and a binary NH3-H2O mixture as working fluid,” Int. J. Therm. Sci., vol. 49, pp. 48-58, 2010.
[9] P. Bombarda, C. M. Invernizzi, and C. Pietra, "Heat recovery from Diesel engines: A thermodynamic comparison between Kalina and ORC cycles,” App. Therm. Eng., vol. 30, pp. 212-219, 2010.
[10] X. Shi and D. Che, "A combined power cycle utilizing low-temperature waste heat and LNG cold energy,” Energy, vol. 50, pp. 567-575, 2009.
[11] J. Wang, Z. Yan, and M. Wang, "Thermodynamic analysis and optimization of an ammonia-water power system with LNG (liquefied natural gas) as its heat sink,” Energy, vol. 50, pp. 513-522, 2013.
[12] A. Bejan, Advanced Engineering Thermodynamics, 3rd ed., John Wiley & Sons, New York. NY, USA, 2006.
[13] A. Bejan, G. Tsatsaronis, and M. Moran, Thermal Design and Optimization, John Wiley & Sons, New York, NY, USA, 1996.
[14] N. Lior and N. Zhang, "Energy, exergy, and second law performance criteria,” Energy, vol. 32, pp. 281-296, 2007.
[15] D. Tarlet, Y. Fan, S. Roux, and L. Luo, "Entropy generation analysis of a mini heat exchanger for heat transfer intensification,” Exp. Therm. Fluid Sci., in press, 2013.
[16] E. A. Sciubba, "A minimum entropy generation procedure for the discrete pseudo-optimization of finned-tube heat exchangers,” Rev. Gen. Therm., vol. 35, pp. 517-525, 1996.
[17] P. Naphon, "Second law analysis on the heat transfer of the horizontal concentric tube heat exchanger,” Int. Commun. Heat Mass, vol. 33, pp. 1029-1041, 2006.
[18] J. Y. San, "Second-law performance of heat exchangers for waste heat recovery,” Energy, vol. 35, pp. 1936-1945, 2010.
[19] B. David, J. Ramousse, and L. Luo, "Optimization of thermoelectric heat pumps by operating condition management and heat exchanger design,” Energ. Convers. Manage., vol. 60, pp. 125-133, 2012.
[20] G. Giangaspero and E. Sciubba, "Application of the entropy generation minimization method to a solar heat exchanger: A pseudo-optimization design process based on the analysis of the local entropy generation maps,” Energy, vol. 58, pp. 52-65, 2013.
[21] 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.
[22] 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, vol. 12, pp. 344-361,2013
[23] K. H. Kim and K. C. Kim, "Thermodynamic performance analysis of a combined power cycle using low grade heat source and LNG cold energy,” App. Therm. Eng., in press, 2014.
[24] 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, Appl. Energy, vol. 113, pp. 970-981, 2014.
[25] K. H. Kim, K. Kim, and H. J. Ko, "Entropy and exergy analysis of a heat recovery vapor generator for ammonia-water mixtures,” Entropy, vol. 16, pp. 2056-2070, 2014.
[26] F. Xu and D. Y. Goswami, "Thermodynamic properties of ammonia– water mixtures for power-cycle application,” Energy, vol. 24, pp. 525-536, 1999.