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Sobolewski A.,Instytut Chemicznej Przerobki Wegla | Bartela L.,Instytucie Maszyn i Urzadzen Energetycznych | Skorek-Osikowska A.,Instytucie Maszyn i Urzadzen Energetycznych | Iluk T.,Instytutu Chemicznej Przerobki Wegla w Zabrzu
Rynek Energii | Year: 2012

This paper presents the results of an economic analysis of the combined heat and power plants, based on a biomass gasification process. The analysis is based on the results of the research conducted at the Institute for Chemical Processing of Coal in Zabrze on the innovative gasifier GazEla. The results of the research demonstrate the possibility of the effective production of gas with the quality enabling for its use in a piston engine or even in a gas turbine. The purpose of the analysis, the results of which are presented in this paper, was to compare the systems that integrate the process gas production based on the use of the generator GazEla with a piston engine and a gas turbine. A comparison of the two systems was based on the obtained values of NPV indicator. In addition, the impact of changes in the economic environment by changing a break-even price of electricity, heat and prices of certificate given for electricity produced from biomass and so-called high-efficiency cogeneration system was analyzed.

In this article the economic efficiency of an IGCC power plant was analyzed. This system consists of a gas generator, CO2 membrane installation (CCS) and a combined cycle. The investment cost was assumed for the selected IGCC systems integrated with the CCS installation. The basic indicators of economic analysis were determined. For the conducted analysis it is essential to determine the break-even price of electricity, as well as the cost of CO2 avoided emission. The effect of changes of the efficiency of the system and the auxiliary power rate on the price of 1 MWh of electricity was analyzed. Also, the effect of the availability, the investment cost, the price of fuel, the cost of individual elements and the size of macroeconomic factors was analyzed.

Bartela L.,Instytucie Maszyn i Urzadzen Energetycznych | Skorek-Osikowska A.,Instytucie Maszyn i Urzadzen Energetycznych | Kotowicz J.,Instytucie Maszyn i Urzadzen Energetycznych
Rynek Energii | Year: 2014

This paper presents selected results of a risk analysis concerning the integration of a combined heat and power plant working at supercritical parameters with an absorption CO2 separation installation. The analysis was performed for two variants of the CHP plant, i.e., for a unit without integration and for a unit integrated with an absorption separation, using the Monte Carlo method. Prior to analysis, the technical and economic risk factors were selected. The quantities preselected as random variables for the risk analysis in the first place were subjected to the sensitivity analysis, in order to demonstrate the influence of their changes on the economic efficiency indicator, for which the break-even price of electricity was selected. In order to perform the risk analysis, for each random variable the expected values and ranges of relative changes in value were assumed, which may be due to changes in the environment of operation of the CHP plant, and which today represents the degree of uncertainty as to the assumptions. Two selected indicators of risk assessment were defined in this paper, of which the determination for the subjected investment constituted the basis for the conclusions drawn in the summary of the paper.

This paper presents an analysis of the thermal cycle of a supercritical 900 MWe condensing power plant which meets the "CCS ready" requirements. This means that once CO2 capture installations become commercially available, they will be added to the thermal cycle. The C0 2 separation method selected for the analysis is chemical absorption using MEA as sorbent with different energy consumption. The analysis also takes into account the operation of an eight-stage geared compressor which satisfies the needs of CO2 transport. The calculations are performed for a power unit fired with hard and brown coal. The change in the power plant operation indices after its integration with a separation installation is presented as a function of the sorbent energy consumption.

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