The possibility of exploiting low-temperature heat sources has been of great significance with ever increasing energy demand. Optimum and cost-effective design of the power cycles provide a means of utilization of low-temperature heat sources which might otherwise be discarded. In this analysis, the performance of the Kalina cycle system 11 (KCS11) is examined for low-temperature geothermal heat sources and is compared with an organic Rankine cycle. The effect of the ammonia fraction and turbine inlet pressure on the cycle performance is investigated in detail. Results show that for a given turbine inlet pressure, an optimum ammonia fraction can be found that yields the maximum cycle efficiency. Further, the maximum cycle efficiency does not necessarily yield the optimum operating conditions for the system. In addition, it is important to consider the utilization of the various circulating media (i.e., working fluid, cooling water, and heat resource) and heat exchanger area per unit power produced. For given conditions, an optimum range of operating pressure and ammonia fraction can be identified that result in optimum cycle performance. In general, the KCS11 has better overall performance at moderate pressures than that of the organic Rankine cycle.
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September 2007
Research Papers
The Performance of the Kalina Cycle System 11(KCS-11) With Low-Temperature Heat Sources
H. D. Madhawa Hettiarachchi,
H. D. Madhawa Hettiarachchi
Department of Mechanical and Industrial Engineering,
University of Illinois at Chicago
, 842 W. Taylor Street, Chicago, IL 60607
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Mihajlo Golubovic,
Mihajlo Golubovic
Department of Mechanical and Industrial Engineering,
University of Illinois at Chicago
, 842 W. Taylor Street, Chicago, IL 60607
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William M. Worek,
William M. Worek
Department of Mechanical and Industrial Engineering,
e-mail: wworek@uic.edu
University of Illinois at Chicago
, 842 W. Taylor Street, Chicago, IL 60607
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Yasuyuki Ikegami
Yasuyuki Ikegami
Institute of Ocean Energy,
Saga University
, Honjomachi 1, Saga 840-8502, Japan
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H. D. Madhawa Hettiarachchi
Department of Mechanical and Industrial Engineering,
University of Illinois at Chicago
, 842 W. Taylor Street, Chicago, IL 60607
Mihajlo Golubovic
Department of Mechanical and Industrial Engineering,
University of Illinois at Chicago
, 842 W. Taylor Street, Chicago, IL 60607
William M. Worek
Department of Mechanical and Industrial Engineering,
University of Illinois at Chicago
, 842 W. Taylor Street, Chicago, IL 60607e-mail: wworek@uic.edu
Yasuyuki Ikegami
Institute of Ocean Energy,
Saga University
, Honjomachi 1, Saga 840-8502, JapanJ. Energy Resour. Technol. Sep 2007, 129(3): 243-247 (5 pages)
Published Online: February 24, 2007
Article history
Received:
May 3, 2006
Revised:
February 24, 2007
Citation
Madhawa Hettiarachchi, H. D., Golubovic, M., Worek, W. M., and Ikegami, Y. (February 24, 2007). "The Performance of the Kalina Cycle System 11(KCS-11) With Low-Temperature Heat Sources." ASME. J. Energy Resour. Technol. September 2007; 129(3): 243–247. https://doi.org/10.1115/1.2748815
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