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Item type:Publication, Access status: without files , Derivation of correlations to evaluate the impact of retrofitted post-combustion CO2 capture processes on steam power plant performanceWhen integrating a post-combustion CO2 capture process and CO2 compression into a steam power plant, the three interface quantities heat, electricity and cooling duty must be satisfied by the power plant, leading to a loss in net efficiency. The heat duty shows to be the largest contributor to the overall net efficiency penalty of the power plant. Additional energy penalty results from the cooling and electric power duty of the capture and compression units.In this work, the dependency of the energy penalty on the quantity and quality of the heat duty is analyzed and quantified for a state-of-the-art hard coal fired power plant. Furthermore, the energy penalty attributed to the additional cooling and power duty is quantified. As a result correlations are provided which enable to predict the impact of the heat, cooling and electricity duty of post-combustion CO2 capture processes on the net output of a steam power plant in a holistic approach.Publicationtype: Journal Article5 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Post-combustion CO₂ capture : energetic evaluation of chemical absorption processes in coal-fired steam power plants(2011); In this work, a semi-empirical column model is developed to represent absorber and desorber columns of post-combustion CO2 capture processes in coal-fired steam power plants. The chemical solvents are represented by empirical correlations on the basis of fundamental measurement data (CO2 solubility, heat capacity, density). The model of a CO2 capture process including the column model is coupled to detailed models of a hard-coal-fired steam power plant and of a CO2 compressor to evaluate and compare the impact of CO2 capture using six different solvents on the overall power plant process. This version is different from the original version on pages 171 and 172. Exchanged on 2011/06/03.Publicationtype: Doctoral Thesis1664 1811 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Derivation of power loss factors to evaluate the impact of post-combustion CO₂ capture processes on steam power plant performanceWhen integrating a post-combustion CO2capture process and a CO2compressor into a steam power plant, the heat duty for the regeneration of the solvent (and the corresponding steam extraction) shows to be the largest contributor to the overall net efficiency penalty of the power plant. One parameter which varies from plant to plant and which significantly affects the impact of steam extraction from the steam turbine on the power plant efficiency is the pressure in the IP/LP crossover. In this work, the dependency of the energy penalty on the quantity and quality of the heat duty is analysed and quantified for three state-of-the-art hard coal fired power plant configurations with different pressure levels in the IP/LP crossover.Publicationtype: Journal ArticleScopus© Citations 17 275 443 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Semi-empirical model for the direct simulation of power plant with integrated post-combustion CO₂ capture processes by wet chemical absorptionIn this work, a semi-empirical column model is developed to represent post-combustion CO2capture processes with chemical solvents in coal-fired steam power plants. The solvents are represented by empirical correlations on the basis of fundamental measurement data (CO2 solubility, heat capacity, density). The model of a CO2 capture process including the column model is coupled to detailed models of a hard-coal-fired steam power plant and of a CO2 compressor to evaluate and compare the impact of CO2 capture on the overall power plant process using six different solvents.Publicationtype: Conference PaperScopus© Citations 11 322 418 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Optimised integration of post-combustion CO2 capture process in greenfield power plants(2010-07-20); ; Newly built (greenfield) power plant offer the advantage of optimised integration measures to reduce the efficiency penalty associated with the application of a post-combustion CO capture process by wet chemical absorption. Especially, the integration of waste heat from the desorber overhead condenser of the CO capture unit (CCU) and from the CO compressor into the water-steam-cycle of the power plant offers optimisation potential.In this work, the adaptation of pressure levels in the water-steam-cycle regarding the steam requirements of the CCU is evaluated. Particular focus is put on waste heat integration by condensate pre-heating and combustion air pre-heating for minimisation of the overall net efficiency loss. The efficiency potential of the available options as well as the limits of integration, especially with respect to a power plant in commercial operation, are discussed.EBSILON Professional is used to develop a model of the overall process including power plant, CO compressor and CCU. The power plant represents a state-of-the-art hard-coal-fired power plant with 600 MW power output (gross). The CCU is modelled as a black box, where the interface quantities of the black box are determined by a detailed model of the capture process in ASPEN Plus using monoethanolamine (MEA) as solvent.Publicationtype: Journal Article43 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Post-combustion CO₂ capture in coal-fired power plants : comparison of integrated chemical absorption processes with piperazine promoted potassium carbonate and MEAA thermodynamic and economic comparison of post-combustion CO2capture processes using aqueous solutions of piperazine (PZ) promoted potassium carbonate (K2CO3) and monoethanolamine (MEA) based on fair boundary conditions and constant assumptions using rigorous thermodynamic models is described. In contrast to a first preliminary comparison, it is shown that under the stated assumptions and considered boundary conditions, a 7 m MEA solution performs better in both thermodynamic and economic terms than aqueous solutions of K2CO3and PZ.Publicationtype: Conference PaperScopus© Citations 62 515 343