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1

Selected aspects of operation of supercritical (transcritical) organic Rankine cycle

Mocarski S., Borsukiewicz-Gozdur A.

Archives of Thermodynamics

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2015

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Vol. 36, no. 2

85--103

EN

The paper presents a literature review on the topic of vapour power plants working according to the two-phase thermodynamic cycle with supercritical parameters. The main attention was focused on a review of articles and papers on the vapour power plants working using organic circulation fluids powered with low- and medium-temperature heat sources. Power plants with water-steam cycle supplied with a high-temperature sources have also been shown, however, it has been done mainly to show fundamental differences in the efficiency of the power plant and applications of organic and water-steam cycles. Based on a review of available literature references a comparative analysis of the parameters generated by power plants was conducted, depending on the working fluid used, the type and parameters of the heat source, with particular attention to the needs of power plant internal load.

2

Numerical thermodynamic optimization of supercritical coal fired power plant with support of IPSEpro software

Elsner W., Kowalczyk Ł., Marek M.

Archives of Thermodynamics

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2012

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Vol. 33, no. 3

101-110

EN

The paper presents a thermodynamic optimization of supercritical coal fired power plant. The aim of the study was to optimize part of the thermal cycle consisted of high-pressure turbine and two chosen high-pressure feed water heaters. Calculations were carried out using IPSEpro software combined with MATLAB, where thermal efficiency and gross power generation efficiency were chosen as objective functions. It was shown that the optimization with newly developed framework is sufficiently precise and its main advantage is the reduction of computation time on comparison to the classical method. The calculations have shown the tendency of the increase in efficiency, with the rise of a number of function variables.

3

Utylizacja ciepła odpadowego z procesu wypalania klinkieru cementowego w elektrowni z nadkrytyczną siłownią organiczną

Borsukiewicz-Gozdur A., Nowak W.

Rynek Energii

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2009

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nr 6

75-81

PL

W pracy przeprowadzono analizę możliwości i opłacalności zasilania elektrowni z organiczną siłownią nadkrytyczną energią odpadową z procesu wytwarzania klinkieru cementowego. Proces ten charakteryzuje się stosunkowo wysoką energochłonnością a szczególnie korzystne parametry, pod kątem zagospodarowania ciepła odpadowego posiada powietrze nadmiarowe z chłodnika klinkieru. W ramach tej pracy przeanalizowano możliwość przetwarzania ciepła odpadowego o temperaturze 270°C na prąd elektryczny z zastosowaniem siłowni na paramenty nadkrytyczne tzw. S-ORC. Dla wybranych czterech organicznych czynników roboczych: R41, R152a, R245fa i R365mfc wykonano obliczenia wielkości charakterystycznych sprawności i pracy jednostkowej. Przeprowadzono także uproszczoną analizę ekonomiczną stosowania siłowni S-ORC w oparciu o wskaźniki oceny ekonomicznej: wartość obecną netto (NPV) oraz indeks zyskowności (PI).

EN

At the work analysis of the possibility and profitability of supplying the power station with the supercritical, organic power plant supplied by waste energy from the process of producing the cement clinker have been conducted. This process is characterized relatively high energy consumption, particularly beneficial parameters has excess air from process of cooling the clinker. As part of this work a possibility of converting the waste heat with temperature 270°C was analysed to the electricity production using the supercritical organic cycle so-called S-ORC. For four chosen organic working substances: R 41, R 152a, R245fa and R356 mfc were carried out calculation of characteristic parameters: the efficiency and the specific work. Also a simplified economic analysis of applying the S-ORC in the cement industry was conducted based on indicators of the economic appraisal: net present value (NPV) and index of the profitability (PI).