THERMODYNAMIC ANALYSIS OF A KALINA POWER UNIT DRIVEN BY LOW TEMPERATURE HEAT SOURCES

Abstract

In this paper the operation of a reversible Kalina power cycle driven by low temperature heat sources has been studied. A numerical model has been developed to analyze thermodynamically the proposed cycle and to represent it in temperature-entropy and temperature-enthalpy diagrams. A parametric study has been conducted in order to specify the optimum values of the main parameters, i. e. low pressure, condensation and heat source temperature with respect to thermal performance. An improved configuration using a counter-current absorber instead of the conventional condenser (co-current absorber) has been proposed which has significantly higher efficiency and work output. Finally, simple equations have been derived which link the main parameters of the unit with the theoretical thermal efficiency.

Keywords

Dates

  • Submission Date2008-07-17
  • Revision Date2009-03-26
  • Acceptance Date2009-03-31

DOI Reference

10.2298/TSCI0904021L

References

  1. Kalina, A. I., Combined Cycle and Waste Heat Recovery Power Systems Based on a Novel Thermodynamic Energy Cycle Utilizing Low-Temperature Heat for Power Generation, Proceedings, Joint Power Generation Conference, Indianapolis, Ind., USA, 1983, ASME Paper No. 83-JPGC-GT-3.
  2. Rogdakis, E. D., Thermodynamic Analysis, Parametric Study and Optimun Operation of the Kalina Cycle, International Journal of Energy Research, 20 (1996), 4, pp. 359-370
  3. Rogdakis, E. D., Antonopoulos, K. A., A High Efficiency NH3-H2O Absorption Power Cycle, Heat Recovery Systems and CHP, 11 (1991), 4, pp. 263-275
  4. Kalina, A. I., Leibowitz, H. M., Application of the Kalina Cycle Technology to Geothermal Power Generation, Geothermal Resources Council Transactions, 13 (1989), pp. 605-611
  5. Leibowitz, H. M., Mlcak, H. A., Design of a 2 MW Kalina Cycle Binary Module for Installation in Husavik, Iceland, Proceedings, Geothermal Resources Council Annual Meeting, Reno, Nev., USA, 1999, Vol. 23, pp. 75-80
  6. Ziegler, B., Trepp, C., Equation of State for Ammonia-Water Mixtures, International Journal of Refrigeration, 7 (1984), 2, pp. 101-106
  7. Kouremenos, D. A., Rogdakis, E. D., The Temperature - Entropy (or Enthalpy) and the Enthalpy-Entropy (Mollier) Diagrams of the Kalina Cycle., ASME Advanced Energy Systems Division, New York, USA, 1990, Vol. 19, pp. 13-19
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