The Experts below are selected from a list of 1614 Experts worldwide ranked by ideXlab platform
Matteo Vincenzo Rocco - One of the best experts on this subject based on the ideXlab platform.
-
conceptual design exergoeconomic analysis and multi objective optimization for a novel integration of biomass Fueled Power Plant with mcfc cryogenic co2 separation unit for low carbon Power production
Energy, 2021Co-Authors: Ehsan Akrami, Mohammad Ameri, Matteo Vincenzo RoccoAbstract:Abstract In the present study, the low-Carbon Power production concept is proposed to introduce a novel integration. In the Bio-Energy Carbon Capture and Storage framework, Municipal Solid Waste is regarded as the main fuel for the system. To administer the analysis, a combination of a downdraft gasifier, a directly fired-gas turbine, Molten Carbonate Fuel Cell, Organic Rankine Cycle, and cryogenic CO2 separation unit is considered. The proposed integration is investigated from themodynamic, exergoeconomic, and environmental points of view. The multi-objective optimization is also conducted to minimize the CO2 emission and cost of electricity besides maximizing the overall exergy efficiency. By applying the optimum values for decision parameters, exergetic and economic results indicate that the combustion chamber and downdraft gasifier are identified as the component with maximum exergy destruction rate (17.44% and 14.59% of the total, respectively) due to high combustion and chemical reactions inefficiencies. Also, the net energy and exergy efficiency, cost of electricity, and specific CO2 emission result as 51.65%, 45.98%, 80.59 USD/MWh, and 101.20 kgCO2/kWh for the proposed system, respectively. The optimization results reveal that the CO2 emission was reduced by 33%. However, the exergy efficiency and cost of electricity will increase by 3% and 1.6%, respectively.
-
integration of biomass Fueled Power Plant and mcfc cryogenic co2 separation unit for low carbon Power production thermodynamic and exergoeconomic comparative analysis
Energy Conversion and Management, 2020Co-Authors: Ehsan Akrami, Mohammad Ameri, Matteo Vincenzo RoccoAbstract:Abstract Bio-Energy with Carbon Capture and Storage (BECCS) system is emerging as a promising technology to support the development of low carbon Power systems. In this context, the present research proposes two scenarios to obtain a biomass-Fueled Power Plant with limited CO2 emissions. A novel combination of a downdraft gasifier (DG), internally fired gas turbine, Molten Carbonate Fuel Cell (MCFC), Organic Rankine Cycle (ORC), and cryogenic separation unit, is proposed (named scenario 1) and it is compared to a system in which a bottoming steam cycle (SBC) was used instead of the ORC (named scenario 2). To have a deeper insight into the performance of the integrations, a sensitivity analysis and comparative study have been developed in this research in terms of their thermodynamic and economic performance. Sensitivity analysis explores the effects of significant variables on the proposed system performance: fuel cell current density, fuel cell steam to carbon ratio, gas turbine inlet temperature, and CO2 and fuel utilization factors. Exergy and exergoeconomic analyses reveal that the air-preheater in scenario 1 and gasifier in scenario 2 are identified as the component with maximum exergy destruction rate (21% and 14% of total respectively) and HRU in scenario 1 and SBC condenser have the lowest value of the exergoeconomic factor (3.76% and 0.01% respectively) due to high thermodynamic inefficiencies, while MCFC in both scenarios has the highest exergoeconomic factor 87.29% and 80.67% respectively due to its high investment cost. Also, scenario 1 achieves the amount of 83.86 (USD/MWeh) for LCOE that is 55.76 (USD/MWeh) more than the reference case and 3.55 (USD/MWeh) less than the scenario 2.
Tsuichun Tsou - One of the best experts on this subject based on the ideXlab platform.
-
characteristics of heavy metals emitted from a heavy oil Fueled Power Plant in northern taiwan
Aerosol and Air Quality Research, 2010Co-Authors: Yafen Wang, Howran Chao, Linchi Wang, Guoping Changchien, Tsuichun TsouAbstract:The characteristics and distribution of metal contents emitted from a Power Plant Fueled by heavy oil and its impact to the ambient atmosphere near the Power Plant was investigated. The current investigation measured toxic (As, Cd, Cr, Hg, Ni and Pb), anthropogenic (Ba, Cu, Mn, Sb, Se, Sr, Ti, V and Zn) and crust (Al, Ca, Fe, K and Mg) elements from a 2,000 MW heavy oil-fired Power Plant. Results showed the emission concentration from the Power Plant contributed to 17,976 kg/yr annual emission of anthropogenic elements, which was significantly higher than those from some electrical arc furnaces and coke ovens in Taiwan. For toxic metals, As, Cd or Ni concentration do not exceed target values established by the European Council (2004/107/EC) for As (6 ng/m 3 ), Cd (5 ng/m 3 ) and Ni (20 ng/m 3 ). This study also applies nonparametric statistical analyses for evaluating the relationship between metal concentrations and operational parameters (including emitted CO2, O2, flue gas emission temperature, flue gas velocity, moisture, heavy oil consumption rate, boiler steam temperature, boiler operational pressure, and electricity). Findings show negative correlations between most toxic metals (As, Cd, Cr and Hg) and operational parameters, though some pairs were not statistically significant. The current study provides only preliminary statistical results between metal concentrations and operational parameters due to small sample sizes. Further investigation requires larger sample sizes.
-
emissions of polychlorinated dibenzo p dioxins and dibenzofurans from a heavy oil Fueled Power Plant in northern taiwan
Journal of Hazardous Materials, 2009Co-Authors: Yafen Wang, Howran Chao, Linchi Wang, Guoping Changchien, Hsihsien Yang, Ding Yan Lin, Tsuichun TsouAbstract:Abstract We measured the concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) from the flue gas and the ambient atmosphere of a Power Plant Fueled by heavy oil in northern Taiwan. The mean emission concentration and I-TEQ concentration of total PCDD/Fs were 0.292 ng/N m3 and 0.016 ng I-TEQ/N m3, respectively. All PCDD/F emission concentrations in the flue gas were supposed to meet the Environmental Protection Administration Executive Yuan, R.O.C. standard (1.0 ng I-TEQ/N m3 from 2008). Furthermore, the mean I-TEQ concentration in the ambient atmosphere was 0.011 pg I-TEQ/N m3, which was much lower than the environmental quality standards for dioxins in Japan (0.6 pg TEQ/N m3). Also, the PCDD/F emission factor was 0.188 ng I-TEQ/L fuel, which was comparable to the data issued in US EPA [EPA, Locating and estimating air emissions from sources of dioxins and furans, Office of Air Quality Planning and Standards, Research Triangle Park, NC, DCN No. 95-298130-54-01, 1997] (0.2 ng I-TEQ/L of fuel). Also, the result of the correlations of PCDD/Fs and operational parameters illustrated that the positively significant correlation (r = 0.502, p = 0.048) was found only between PCDD/Fs (I-TEQ) and the flue gas emission temperature (125–157 °C). However, PCDD-TEQ/PCDF-TEQ ratios were statistically significantly associated with the decreased flue gas flow (r = −0.659, p = 0.006), moisture (r = −0.612, p = 0.012) and flue gas temperature (r = −0.503, p = 0.047). For proper environmental management of dioxins, it is necessary to establish a complete emission inventory of PCDD/Fs, and, in particular, the government should pay more attention to Power Plants to address the information shortage.
Ehsan Akrami - One of the best experts on this subject based on the ideXlab platform.
-
conceptual design exergoeconomic analysis and multi objective optimization for a novel integration of biomass Fueled Power Plant with mcfc cryogenic co2 separation unit for low carbon Power production
Energy, 2021Co-Authors: Ehsan Akrami, Mohammad Ameri, Matteo Vincenzo RoccoAbstract:Abstract In the present study, the low-Carbon Power production concept is proposed to introduce a novel integration. In the Bio-Energy Carbon Capture and Storage framework, Municipal Solid Waste is regarded as the main fuel for the system. To administer the analysis, a combination of a downdraft gasifier, a directly fired-gas turbine, Molten Carbonate Fuel Cell, Organic Rankine Cycle, and cryogenic CO2 separation unit is considered. The proposed integration is investigated from themodynamic, exergoeconomic, and environmental points of view. The multi-objective optimization is also conducted to minimize the CO2 emission and cost of electricity besides maximizing the overall exergy efficiency. By applying the optimum values for decision parameters, exergetic and economic results indicate that the combustion chamber and downdraft gasifier are identified as the component with maximum exergy destruction rate (17.44% and 14.59% of the total, respectively) due to high combustion and chemical reactions inefficiencies. Also, the net energy and exergy efficiency, cost of electricity, and specific CO2 emission result as 51.65%, 45.98%, 80.59 USD/MWh, and 101.20 kgCO2/kWh for the proposed system, respectively. The optimization results reveal that the CO2 emission was reduced by 33%. However, the exergy efficiency and cost of electricity will increase by 3% and 1.6%, respectively.
-
integration of biomass Fueled Power Plant and mcfc cryogenic co2 separation unit for low carbon Power production thermodynamic and exergoeconomic comparative analysis
Energy Conversion and Management, 2020Co-Authors: Ehsan Akrami, Mohammad Ameri, Matteo Vincenzo RoccoAbstract:Abstract Bio-Energy with Carbon Capture and Storage (BECCS) system is emerging as a promising technology to support the development of low carbon Power systems. In this context, the present research proposes two scenarios to obtain a biomass-Fueled Power Plant with limited CO2 emissions. A novel combination of a downdraft gasifier (DG), internally fired gas turbine, Molten Carbonate Fuel Cell (MCFC), Organic Rankine Cycle (ORC), and cryogenic separation unit, is proposed (named scenario 1) and it is compared to a system in which a bottoming steam cycle (SBC) was used instead of the ORC (named scenario 2). To have a deeper insight into the performance of the integrations, a sensitivity analysis and comparative study have been developed in this research in terms of their thermodynamic and economic performance. Sensitivity analysis explores the effects of significant variables on the proposed system performance: fuel cell current density, fuel cell steam to carbon ratio, gas turbine inlet temperature, and CO2 and fuel utilization factors. Exergy and exergoeconomic analyses reveal that the air-preheater in scenario 1 and gasifier in scenario 2 are identified as the component with maximum exergy destruction rate (21% and 14% of total respectively) and HRU in scenario 1 and SBC condenser have the lowest value of the exergoeconomic factor (3.76% and 0.01% respectively) due to high thermodynamic inefficiencies, while MCFC in both scenarios has the highest exergoeconomic factor 87.29% and 80.67% respectively due to its high investment cost. Also, scenario 1 achieves the amount of 83.86 (USD/MWeh) for LCOE that is 55.76 (USD/MWeh) more than the reference case and 3.55 (USD/MWeh) less than the scenario 2.
Salajka Elisabeth - One of the best experts on this subject based on the ideXlab platform.
-
Grobauslegung von Hochtemperatur- Wärmespeichern für den Wärmeknoten Dürnrohr
2019Co-Authors: Salajka ElisabethAbstract:Die Firma EVN AG ist für ein Wärmenetz am Standort Dürnrohr zuständig. Dieses versorgt unter anderem die umliegenden Industriebetriebe mit Prozessdampf und das örtliche Fernwärmenetz. Zur Dampferzeugung stehen eine Müllverbrennungsanlage und ein Kohlekraftwerk bereit. Der zuküftige Betrieb des Kohlekraftwerkes ist nicht gesichert. Es gibt daher zwei mögliche Zukunftsvarianten: a) Errichtung eines gasbefeuerten Hilfskessels b) Erweiterung der Müllverbrennungsanlage um einen thermischen Energiespeicher Ein thermischer Energiespeicher (TES) soll das Kohlekraftwerk bzw. Hilfskessel ablösen, somit die Energiebereitstellung wirtschaftlicher machen und den CO2-Ausstoß reduzieren. Dieser Energiespeicher wird in Zusammenarbeit mit der TU Wien, die auf diesem Gebiet nicht nur theoretische, sondern auch praktische Erfahrung in Form von erprobten Modellanlagen besitzt, ausgewählt. Die Auffindung des optimalen Speichers wird von einem staatlich geförderten Projekt begleitet. Als TES kommen mehrere verschiedene Technologien in Frage, von denen drei in dieser Arbeit hinsichtlich Dimensionierung und involvierter Materialien für eine Speicherkapazität von 70 MWh und konkreter Dampfparameter zum Laden und Entladen untersucht wurden. Diese Technologien sind ein Dampfgefällespeicher (Typ Ruthsspeicher), ein durchströmter Festbettregenerator, welcher Luft als Wärmeüberträgermedium und Gestein als Speichermedium verwendet, und ein Latentwärmespeicher. Dieser nimmt die thermische Energie durch einen Phasenwechsel auf und die Wärmeübertragung in das Phasenwechselmaterial wird mit Hilfe eines eigens von der TU entwickelten Rippenrohrgeometrie realisiert. Für den Ruthsspeicher wurde ein Simulationsmodell in Apros erstellt, um die errechneten Ergebnisse zu belegen und die Betriebsbedingungen über einen Zyklus darzustellen.The company EVN AG is responsible for a heat grid located at Dürnrohr. It supplies among others the surrounding industry with process steam and the local district heating network. For steam generation a waste incinerator and a coal-Fueled Power Plant are available. The Power Plant will have to be shut down in the future. That is why two future variants are possible: a) Construction of a gas-fired auxiliary boiler b) Expansion of the waste incineration Plant by a thermal energy storage unit A thermal energy storage unit (TES) shall detach the coal-Fueled Power Plant or auxiliary boiler, consequently making energy supplying more economic and reducing the CO2-emissions. This energy storage unit is selected in cooperation with TU Wien, whose knowledge at this topic is not only theoretical but also practical in the form of field-tested demonstration Plants. Finding the ideal storage unit is accompanied by a governmental-sponsored project. Different technologies are possible for the TES. Three of them have been investigated in this thesis in respect to their dimensions and involved materials for a storage capacity of 70 MWh and specific steam parameters for charging and discharging. This technologies are a steam accumulator, a fixed bed regenerator, which uses air as heat transfer fluid and rock as storage material and a latent heat storage system. It absorbs the thermal energy through a phase change. Heat transfer into phase change material is achieved by a specially built finned tube geometry. For the steam accumulator a simulation model in Apros was built to verify the calculated results and illustrate operating conditions over a cycle.von Elisabeth SalajkaZusammenfassung in englischer SpracheTechnische Universität Wien, Diplomarbeit, 2019(VLID)339354
-
Grobauslegung von Hochtemperatur- Wärmespeichern für den Wärmeknoten Dürnrohr
'Universidad Norbert Wiener', 2019Co-Authors: Salajka ElisabethAbstract:Die Firma EVN AG ist für ein Wärmenetz am Standort Dürnrohr zuständig. Dieses versorgt unter anderem die umliegenden Industriebetriebe mit Prozessdampf und das örtliche Fernwärmenetz. Zur Dampferzeugung stehen eine Müllverbrennungsanlage und ein Kohlekraftwerk bereit. Der zuküftige Betrieb des Kohlekraftwerkes ist nicht gesichert. Es gibt daher zwei mögliche Zukunftsvarianten: a) Errichtung eines gasbefeuerten Hilfskessels b) Erweiterung der Müllverbrennungsanlage um einen thermischen Energiespeicher Ein thermischer Energiespeicher (TES) soll das Kohlekraftwerk bzw. Hilfskessel ablösen, somit die Energiebereitstellung wirtschaftlicher machen und den CO2-Ausstoß reduzieren. Dieser Energiespeicher wird in Zusammenarbeit mit der TU Wien, die auf diesem Gebiet nicht nur theoretische, sondern auch praktische Erfahrung in Form von erprobten Modellanlagen besitzt, ausgewählt. Die Auffindung des optimalen Speichers wird von einem staatlich geförderten Projekt begleitet. Als TES kommen mehrere verschiedene Technologien in Frage, von denen drei in dieser Arbeit hinsichtlich Dimensionierung und involvierter Materialien für eine Speicherkapazität von 70 MWh und konkreter Dampfparameter zum Laden und Entladen untersucht wurden. Diese Technologien sind ein Dampfgefällespeicher (Typ Ruthsspeicher), ein durchströmter Festbettregenerator, welcher Luft als Wärmeüberträgermedium und Gestein als Speichermedium verwendet, und ein Latentwärmespeicher. Dieser nimmt die thermische Energie durch einen Phasenwechsel auf und die Wärmeübertragung in das Phasenwechselmaterial wird mit Hilfe eines eigens von der TU entwickelten Rippenrohrgeometrie realisiert. Für den Ruthsspeicher wurde ein Simulationsmodell in Apros erstellt, um die errechneten Ergebnisse zu belegen und die Betriebsbedingungen über einen Zyklus darzustellen.The company EVN AG is responsible for a heat grid located at Dürnrohr. It supplies among others the surrounding industry with process steam and the local district heating network. For steam generation a waste incinerator and a coal-Fueled Power Plant are available. The Power Plant will have to be shut down in the future. That is why two future variants are possible: a) Construction of a gas-fired auxiliary boiler b) Expansion of the waste incineration Plant by a thermal energy storage unit A thermal energy storage unit (TES) shall detach the coal-Fueled Power Plant or auxiliary boiler, consequently making energy supplying more economic and reducing the CO2-emissions. This energy storage unit is selected in cooperation with TU Wien, whose knowledge at this topic is not only theoretical but also practical in the form of field-tested demonstration Plants. Finding the ideal storage unit is accompanied by a governmental-sponsored project. Different technologies are possible for the TES. Three of them have been investigated in this thesis in respect to their dimensions and involved materials for a storage capacity of 70 MWh and specific steam parameters for charging and discharging. This technologies are a steam accumulator, a fixed bed regenerator, which uses air as heat transfer fluid and rock as storage material and a latent heat storage system. It absorbs the thermal energy through a phase change. Heat transfer into phase change material is achieved by a specially built finned tube geometry. For the steam accumulator a simulation model in Apros was built to verify the calculated results and illustrate operating conditions over a cycle.8
Yafen Wang - One of the best experts on this subject based on the ideXlab platform.
-
characteristics of heavy metals emitted from a heavy oil Fueled Power Plant in northern taiwan
Aerosol and Air Quality Research, 2010Co-Authors: Yafen Wang, Howran Chao, Linchi Wang, Guoping Changchien, Tsuichun TsouAbstract:The characteristics and distribution of metal contents emitted from a Power Plant Fueled by heavy oil and its impact to the ambient atmosphere near the Power Plant was investigated. The current investigation measured toxic (As, Cd, Cr, Hg, Ni and Pb), anthropogenic (Ba, Cu, Mn, Sb, Se, Sr, Ti, V and Zn) and crust (Al, Ca, Fe, K and Mg) elements from a 2,000 MW heavy oil-fired Power Plant. Results showed the emission concentration from the Power Plant contributed to 17,976 kg/yr annual emission of anthropogenic elements, which was significantly higher than those from some electrical arc furnaces and coke ovens in Taiwan. For toxic metals, As, Cd or Ni concentration do not exceed target values established by the European Council (2004/107/EC) for As (6 ng/m 3 ), Cd (5 ng/m 3 ) and Ni (20 ng/m 3 ). This study also applies nonparametric statistical analyses for evaluating the relationship between metal concentrations and operational parameters (including emitted CO2, O2, flue gas emission temperature, flue gas velocity, moisture, heavy oil consumption rate, boiler steam temperature, boiler operational pressure, and electricity). Findings show negative correlations between most toxic metals (As, Cd, Cr and Hg) and operational parameters, though some pairs were not statistically significant. The current study provides only preliminary statistical results between metal concentrations and operational parameters due to small sample sizes. Further investigation requires larger sample sizes.
-
emissions of polychlorinated dibenzo p dioxins and dibenzofurans from a heavy oil Fueled Power Plant in northern taiwan
Journal of Hazardous Materials, 2009Co-Authors: Yafen Wang, Howran Chao, Linchi Wang, Guoping Changchien, Hsihsien Yang, Ding Yan Lin, Tsuichun TsouAbstract:Abstract We measured the concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) from the flue gas and the ambient atmosphere of a Power Plant Fueled by heavy oil in northern Taiwan. The mean emission concentration and I-TEQ concentration of total PCDD/Fs were 0.292 ng/N m3 and 0.016 ng I-TEQ/N m3, respectively. All PCDD/F emission concentrations in the flue gas were supposed to meet the Environmental Protection Administration Executive Yuan, R.O.C. standard (1.0 ng I-TEQ/N m3 from 2008). Furthermore, the mean I-TEQ concentration in the ambient atmosphere was 0.011 pg I-TEQ/N m3, which was much lower than the environmental quality standards for dioxins in Japan (0.6 pg TEQ/N m3). Also, the PCDD/F emission factor was 0.188 ng I-TEQ/L fuel, which was comparable to the data issued in US EPA [EPA, Locating and estimating air emissions from sources of dioxins and furans, Office of Air Quality Planning and Standards, Research Triangle Park, NC, DCN No. 95-298130-54-01, 1997] (0.2 ng I-TEQ/L of fuel). Also, the result of the correlations of PCDD/Fs and operational parameters illustrated that the positively significant correlation (r = 0.502, p = 0.048) was found only between PCDD/Fs (I-TEQ) and the flue gas emission temperature (125–157 °C). However, PCDD-TEQ/PCDF-TEQ ratios were statistically significantly associated with the decreased flue gas flow (r = −0.659, p = 0.006), moisture (r = −0.612, p = 0.012) and flue gas temperature (r = −0.503, p = 0.047). For proper environmental management of dioxins, it is necessary to establish a complete emission inventory of PCDD/Fs, and, in particular, the government should pay more attention to Power Plants to address the information shortage.
