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The use of organic zeotropic mixture with high temperature glide as a working fluid in medium-temperature vapour power plant

The paper presents first the idea of using organic substances as working fluids in vapour power plants, in order to convert the low and medium temperature thermal energy sources into electrical energy. The next part of the work shows the calculation results of the power plant efficiency for butane-ethane zeotropic mixtures of different mass compositions, for the power plant supplied with hot water having a temperature of 120°C. Based on the results of thermal-flow calculations it was found that the use of zeotropic mixture does not allow to increase the efficiency and output of the power plant (these values appeared as slightly lower ones). However, it was found that, through the selection of a mixture of sufficiently large temperature glide, the heat exchange surface of the condenser can be reduced or a co-generation system can be implemented.
PAPER REVISED: 2016-03-03
PAPER ACCEPTED: 2016-03-19
  1. Boyarski M Yu, Nikolski AI, Sapozhnikov MB, Shipkov AA. Comparative performance of working fluids in low-temperature vapor-turbine cycle. CD Proceedings of International Geothermal Workshop, Sochi, Russia, 2003.
  2. Liu, X., Wang, X., Zhang, C. Sensitivity analysis of system parameters on the performance of the Organic Rankine Cycle system for binary-cycle geothermal power plants. Applied Thermal Engineering 71 (1), pp. 175-183, 2014.
  3. Algieri, A., Morrone, P. Comparative energetic analysis of high-temperature subcritical and transcritical Organic Rankine Cycle (ORC). A biomass application in the Sibari district. Applied Thermal Engineering 36 (1), pp. 236-244, 2012.
  4. Tchanche, B.F., Papadakis, G., Lambrinos, G., Frangoudakis, A. Fluid selection for a low-temperature solar organic Rankine cycle. Applied Thermal Engineering, 29 (11-12), pp. 2468-2476, 2009.
  5. Cataldo, F., Mastrullo, R., Mauro, A.W., Vanoli, G.P. Fluid selection of Organic Rankine Cycle for low-temperature waste heat recovery based on thermal optimization. Energy 72, pp. 159-167, 2014.
  6. Lemmon, E.W., Huber, M.L., McLinden M.O. NIST Standard Reference Database 23, Refprop 9.1, USA, 2013.
  7. Angelino G, Colonna di Paliano P. Multicomponent working fluids for Organic Rankine Cycles, Energy; 23 (6), pp. 449-463, 1998.
  8. Wang J.L., Zhao L. , Wang X.D.: A comparative study of pure and zeotropic mixtures in low-temperature solar Rankine cycle. Applied Energy 87, pp. 3366-3373, 2010.
  9. Chen, H, Goswami, D.Y., Rahman, M.M., Stefanakos, E.K. A supercritical Rankine cycle using zeotropic mixture working fluids for the conversion of low-grade heat into power. Energy 36, pp. 549-555, 2011.
  10. Algieri A., Morrone, P. Energy Analysis of Organic Rankine Cycles For Biomass Applications. Thermal Science 19, No. 1, pp. 193-205, 2015.
  11. Bišcan, D., Filipan, V. Potential of Waste Heat in Croatian Industrial Sector, Thermal Science 16, No. 3, pp. 747-758, 2012.