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Advanced Turbine Cycles with Organic Media

Abstract

Organic Rankine Cycle (ORC) power plants have become very popular and have found their applications in systems with renewable sources of energy. So far their overall efficiencies are not very impressive and only for the upper temperature of about 300 °C do they exceed 20%. A drawback of these cycles is the limitation of the cycle upper temperature due to the heat exchanger technology and the materials used. However, it is possible to overcome these difficulties by certain modifications of the thermodynamic cycles, a proper choice of the working medium and the optimization of cycle parameters. In the paper the problems of choosing the working medium and the question of higher temperature at the turbine inlet have been discussed. Different modifications of the schemas of the thermodynamic cycles have also been taken into account. The variants of power plants with regenerators, reheaters and heat exchangers have been considered. The proposed increase in temperature (in some cases up to 600 °C or higher) and innovative modifications of the thermodynamic cycles allow to obtain the power plant efficiency of above 50%. The modified cycles have been described in detail in the paper. The proposed cycles equipped with regenerators and reheaters can have the efficiency even slightly higher than classical steam turbine plants with a reheater and regenerators. Appropriate cycle and turbine calculations have been performed for the micro power plants of turbine output in the range of 10 kW–300 kW (up to several MW in some cases). The best arrangements achieved very high values of the overall cycle efficiency.

Citations

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
ENERGIES no. 13, pages 1327 - 1337,
ISSN: 1996-1073
Language:
English
Publication year:
2020
Bibliographic description:
Piwowarski M., Kosowski K.: Advanced Turbine Cycles with Organic Media// ENERGIES -Vol. 13,iss. 6 (2020), s.1327-1337
DOI:
Digital Object Identifier (open in new tab) 10.3390/en13061327
Verified by:
Gdańsk University of Technology

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