Thermodynamic Performance Analysis of Ammonia-Water Rankine Cycles Using Heat Sources of High and Low Temperatures

Abstract:

In this study, thermodynamic performances of ammonia-water Rankine (AWR) cycle and regenerative Rankine (AWRR) cycle are comparatively investigated. Special attention is focused on the effects of ammonia concentration and turbine inlet pressure on the performance of system using heat sources of high temperature of 300 oC and low temperature of 150 oC. The behavior of important system variables including mass flow ratio of working fluid, net work production, and thermal efficiency are closely examined. Results show that performance characteristics for heat sources of high and low temperatures are quite different each other. For the high-temperature source, the thermal efficiency has a minimum in AWR system while it has a maximum in AWRR with respect to ammonia concentration in the range of 65% to 75%. For low-temperature source, however, the thermal efficiency decreases with ammonia concentration in the range of ammonia concentration higher than 95% for both AWR system and AWRR system and the effect of regenerator is negligible.

• Periodical: Applied Mechanics and Materials (Volumes 249-250)
• Pages: 278-283
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.249-250.278
• Online since: December 2012
• Authors: Kyoung Hoon Kim, Hyung Jong Ko, Se Woong Kim
• Keywords: Ammonia Concentration, Ammonia-Water, Cogeneration System, Rankine Cycle, Thermodynamic Performance

References

[1] R. A. Hinrichs, M. Kleinbach, Energy; Its use and the environment, 4th Ed., Thomson, (2006).

[2] M. Jonsson and J. Yan, Humidified gas turbines – a review of proposed and implemented cycles, Energy 30 (2005) 1013-1078.

DOI: 10.1016/j.energy.2004.08.005

[3] K.H. Kim, H. Perez-Blanco, Potential of regenerative gas-turbine systems with high fogging compression, App. Energy 84 (2007) 16-28.

DOI: 10.1016/j.apenergy.2006.04.008

[4] H. Perez-Blanco, K.H. Kim, S. Ream, Evaporatively-cooled compression using a high-pressure refrigerant, App. Energy 84 (2007) 1028-1043.

DOI: 10.1016/j.apenergy.2007.02.013

[5] K.H. Kim, H.J. Ko, H. Perez-Blanco, Analytical modeling of wet compression of gas turbine systems, App. Therm. Eng. 31 (2011) 834-840.

DOI: 10.1016/j.applthermaleng.2010.11.002

[6] K.H. Kim, H.J. Ko, K. Kim, H. Perez-Blanco, Analysis of water droplet evaporation in a gas turbine inlet fogging process, App. Therm. Eng. 33-34 (2012) 62-69.

DOI: 10.1016/j.applthermaleng.2011.09.012

[7] O. M. Ibrahim, S. A. Klein, Absorption power cycles, Energy 21 (1996) 21-27.

[8] C. Zamfirescu, I. Dincer, Thermodynamic analysis of a novel ammonia-water trilateral Rankine cycle , Thermochim. Acta 477 7 (2008).

DOI: 10.1016/j.tca.2008.08.002

[9] P. Roy, M. Désilets, N. Galanis, H. Nesreddine, 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. 49 (2010) 48-58.

DOI: 10.1016/j.ijthermalsci.2009.05.014

[10] W. R. Wagar, C. Zamfirescu, I. Dincer, Thermodynamic performance assessment of an ammonia-water Rankine cycle for power and heat production Energy Conversion and Mgmt. 51 (2010) 2501-2509.

DOI: 10.1016/j.enconman.2010.05.014

[11] K.H. Kim, C.H. Han, K. Kim, Effects of ammonia concentration on the thermodynamic performance of ammonia-water based on power cycles, Thermochemica Acta 530 (2012) 7-16.

DOI: 10.1016/j.tca.2011.11.028

[12] F. Xu, D. Y. Goswami, Thermodynamic properties of ammonia-water mixtures for power-cycle applications, Energy 24 (1999) 525-536.

DOI: 10.1016/s0360-5442(99)00007-9