Wyniki wyszukiwania - BazTech

1

Repowering a coal-fired power plant with a gas turbine to supply heat for the desorption process

Bartela Ł., Mikosz D.

Journal of Power Technologies

|

2014

|

Vol. 94, nr 4

329–-338

EN

This paper presents the results of an analysis for a 900MWsupercritical coal-fired power plant integrated with an absorption CO2 separation installation and a gas turbine unit. In this unit the gas turbine with evaporator is the heat source for the desorption process, which is realized in a CO2 separation installation. The aim of the analysis was to determine the thermodynamic, ecological and economic evaluation indicators, which are defined in the paper. Analyzes were carried out for the variable heat demand required for the desorption process. Additionally, the impact of a change in emission allowance price on selected economic evaluation indicators was analyzed.

2

Analysis of thermodynamics of two-fuel power unit integrated with a carbon dioxide separation plant

Kotowicz J., Bartela Ł., Mikosz D.

Archives of Thermodynamics

|

2014

|

Vol. 35, no. 4

55--68

EN

The article presents the results of thermodynamic analysis of the supercritical coal-fired power plant with gross electrical output of 900 MW and a pulverized coal boiler. This unit is integrated with the absorption-based CO2 separation installation. The heat required for carrying out the desorption process, is supplied by the system with the gas turbine. Analyses were performed for two variants of the system. In the first case, in addition to the gas turbine there is an evaporator powered by exhaust gases from the gas turbine expander. The second expanded variant assumes the application of gas turbine combined cycle with heat recovery steam generator and backpressure steam turbine. The way of determining the efficiency of electricity generation and other defined indicators to assess the energy performance of the test block was showed. The size of the gas turbine system was chosen because of the need for heat for the desorption unit, taking the value of the heat demand 4 MJ/kg CO2. The analysis results obtained for the both variants of the installation with integrated CO2 separation plant were compared with the results of the analysis of the block where the separation is not conducted.

3

Produkcja energii elektrycznej o ujemnym wskaźniku emisji dwutlenku węgla

Bartela Ł., Mikosz D.

Rynek Energii

|

2012

|

Nr 6

40--45

PL

W artykule przedstawiono wyniki analizy mającej na celu wykazać możliwości uzyskiwania tzw. emisji ujemnych dwutlenku węgla przy produkcji energii elektrycznej w dużych blokach energetycznych. Podstawą takich rozważań jest tzw. bilans zerowy dwutlenku węgla pochłanianego przez roślinę podczas procesu fotosyntezy, a następnie generowanego podczas jej spalania. Dla uzyskania ujemnych wartości dla zdefiniowanego w treści artykułu wskaźnika emisji jednostkowej warunkiem koniecznym jest prowadzenie procesu separacji oraz składowania dwutlenku węgla. W artykule przedstawiono rezultaty analizy przeprowadzonej dla układu o mocy brutto wynoszącej 900 MW. Założono, że blok jest zintegrowany z układem separacji membranowej. Wskaźniki emisji jednostkowych badano dla różnych udziałów masowych biomasy współspalanej z węglem oraz różnych stopni odzysku generowanego dwutlenku węgla. Dodatkowo określono wartości dla energetycznych wskaźników pracy elektrowni, tj. sprawności kotła, wskaźników potrzeb własnych, czy też sprawności wytwarzania energii elektrycznej netto.

EN

In this paper the results of a theoretical analysis aiming to examine the possibility of obtaining of a so-called negative emission of carbon dioxide in the production of electricity in a large power plant are presented. The basis of such considerations is a so-called zero carbon dioxide balance, which is absorbed by a plant during photosynthesis and generated during combustion. An indispensible condition required to obtain a negative value of the defined in the paper unit emission is to carry out the carbon capture and storage process. In the paper a results for the analysis for a 900 MW power plant are shown. It was assumed, that the power plant is integrated with a membrane separation unit. The carbon capture unit emission rates were calculated for different shares of biomass co-fired with coal and different recovery rates of carbon dioxide capture. Additionally, the values of several energy indicators, i.e. boiler efficiency, auxiliary power rates and net efficiency of the power plant were determined.