The Experts below are selected from a list of 16971 Experts worldwide ranked by ideXlab platform
N Chovichien - One of the best experts on this subject based on the ideXlab platform.
-
minimizing Fuel and environmental costs for a variable load power plant co firing Fuel oil and natural gas part 1 modeling of gaseous emissions from Boiler units
Fuel Processing Technology, 2006Co-Authors: W Kaewboonsong, Vladimir I Kuprianov, N ChovichienAbstract:A model for determining an optimum load distribution over distinct Boiler units of a variable-load power plant co-firing Fuel oil and natural gas is discussed. The objective function of the unit load optimization was aimed at minimizing of total operational costs for the entire power plant, including "internal" Boiler costs (i.e. associated with the Fuel consumption) as well as "external" costs (i.e. the cost equivalent of the damage done by the power plant units to the environment and humans). Models for the predicting of the Boiler Fuel consumption and emissions took into account the changes in Boiler key operating variables (excess air, flue gas recirculation factor, waste gas temperature, etc.) affecting the Boiler thermal efficiency with variations in the unit load. Effects of the Fuel gas energy fraction (i.e. contribution of the natural gas to the Boiler heat input) in cases of co-firing Fuel oil and natural gas were included in the model as well. A 1330-MW Fuel oil/gas-fired power plant (consisting of three 310-MW units and two 200-MW units) was the focus of this study. For this power plant, the unit load optimization was carried out based on the typical daily load (electricity demand) curves for three climatic seasons in Thailand. The optimized time-domain daily loads for distinct power plant units for the basic Fuel option (when co-firing medium-sulfur Fuel oil and natural gas in the 310-MW Boilers whilst the 200-MW Boilers were Fuelled with low-sulfur Fuel oil) are presented in this paper. The optimum loading of the power plant units was strongly affected by the pattern of the daily electricity demand as well as by the Fuel option. As shown in this work, application of the optimization method could reduce the total operational costs of this power plant, and the cost reductions (or savings) were dependent upon the daily load patterns, Fuel option, Fuel oil/gas prices as well as the specific "external" costs. Thus, for the basic Fuel option at the 80% Fuel gas energy fraction, the daily cost savings of 0.38 to 1.12% could be achieved for different climatic seasons when switching the power plant Boilers to the optimized loading.
Qing Liu - One of the best experts on this subject based on the ideXlab platform.
-
nox emission from a circulating fluidized bed Boiler cofiring coal and corn stalk pellets
Energy & Fuels, 2012Co-Authors: Hairui Yang, Hai Zhang, Xiaolong Qiu, Shi Yang, Qing LiuAbstract:The NOx emission from a circulating fluidized bed (CFB) Boiler with 50 MW rated thermal output (50 MWth) during the cofiring of anthracite coal and pelletized corn stalk biomass was investigated. Cofiring could improve combustion efficiency and, thus, the thermal efficiency of the Boiler. However, contrary to most results found in bubbling fluidized bed (BFB) combustors and the one found in a CFB Boiler burning rice husk, NOx concentration in flue gas and Fuel nitrogen conversion ratio increased with the biomass mass fraction. Several causes for such a contradiction were discussed and the configuration in combination with feedstock location of biomass was regarded as the most important one. In a CFB Boiler, Fuel is mostly burnt above the dense bed, opposite to that in a BFB Boiler, and, thus, the average oxygen concentration above the dense bed, where biomass was fed, was higher. High bed temperature and high primary air ratio used for burning the anthracite coal increased NOx emission and enhanced the va...
Muhammad Yazid - One of the best experts on this subject based on the ideXlab platform.
-
emission factors of biodiesel combustion in industrial Boiler a comparison to fossil Fuel
Journal of Renewable and Sustainable Energy, 2013Co-Authors: Leily Nurul Komariah, Susila Arita, Soni Solistia Wirawan, Muhammad YazidAbstract:Boiler is one of industrial facilities, which has energy intensive in producing steam or hot water, through Fuel combustion. The large use of industrial Boilers contributes to large emission. Emission factor is one of the most common methods to quantify emissions from combustion appliances such as Boilers. As the biodiesel is an alternative Fuel that has great potential to reduce emissions, it can be potentially used as Boiler Fuel. In this study, biodiesel combustion emission factor is determined through Fuel analysis and direct measurements (stack sampling). A series of test was performed on a fire tube Boiler, in which pressure of 3 bar, using palm biodiesel and its blend with petrodiesel in a variety of composition of biodiesel of 10%, 20%, and 30%. It is known that SO2 and CO emission factors in biodiesel combustion in Boiler was significantly lower than petrodiesel, while CO2 and NOx emission factors tend to higher. Inconsistently, the stack sampling data showed that the emission of CO and CO2 was h...
-
emission factors of biodiesel combustion in industrial Boiler a comparison to fossil Fuel
Journal of Renewable and Sustainable Energy, 2013Co-Authors: Leily Nurul Komariah, Susila Arita, Soni Solistia Wirawan, Muhammad YazidAbstract:Boiler is one of industrial facilities, which has energy intensive in producing steam or hot water, through Fuel combustion. The large use of industrial Boilers contributes to large emission. Emission factor is one of the most common methods to quantify emissions from combustion appliances such as Boilers. As the biodiesel is an alternative Fuel that has great potential to reduce emissions, it can be potentially used as Boiler Fuel. In this study, biodiesel combustion emission factor is determined through Fuel analysis and direct measurements (stack sampling). A series of test was performed on a fire tube Boiler, in which pressure of 3 bar, using palm biodiesel and its blend with petrodiesel in a variety of composition of biodiesel of 10%, 20%, and 30%. It is known that SO2 and CO emission factors in biodiesel combustion in Boiler was significantly lower than petrodiesel, while CO2 and NOx emission factors tend to higher. Inconsistently, the stack sampling data showed that the emission of CO and CO2 was higher than petrodiesel, instead NOx emission of biodiesel combustion was 10% and 27% lower than petrodiesel.
W Kaewboonsong - One of the best experts on this subject based on the ideXlab platform.
-
minimizing Fuel and environmental costs for a variable load power plant co firing Fuel oil and natural gas part 1 modeling of gaseous emissions from Boiler units
Fuel Processing Technology, 2006Co-Authors: W Kaewboonsong, Vladimir I Kuprianov, N ChovichienAbstract:A model for determining an optimum load distribution over distinct Boiler units of a variable-load power plant co-firing Fuel oil and natural gas is discussed. The objective function of the unit load optimization was aimed at minimizing of total operational costs for the entire power plant, including "internal" Boiler costs (i.e. associated with the Fuel consumption) as well as "external" costs (i.e. the cost equivalent of the damage done by the power plant units to the environment and humans). Models for the predicting of the Boiler Fuel consumption and emissions took into account the changes in Boiler key operating variables (excess air, flue gas recirculation factor, waste gas temperature, etc.) affecting the Boiler thermal efficiency with variations in the unit load. Effects of the Fuel gas energy fraction (i.e. contribution of the natural gas to the Boiler heat input) in cases of co-firing Fuel oil and natural gas were included in the model as well. A 1330-MW Fuel oil/gas-fired power plant (consisting of three 310-MW units and two 200-MW units) was the focus of this study. For this power plant, the unit load optimization was carried out based on the typical daily load (electricity demand) curves for three climatic seasons in Thailand. The optimized time-domain daily loads for distinct power plant units for the basic Fuel option (when co-firing medium-sulfur Fuel oil and natural gas in the 310-MW Boilers whilst the 200-MW Boilers were Fuelled with low-sulfur Fuel oil) are presented in this paper. The optimum loading of the power plant units was strongly affected by the pattern of the daily electricity demand as well as by the Fuel option. As shown in this work, application of the optimization method could reduce the total operational costs of this power plant, and the cost reductions (or savings) were dependent upon the daily load patterns, Fuel option, Fuel oil/gas prices as well as the specific "external" costs. Thus, for the basic Fuel option at the 80% Fuel gas energy fraction, the daily cost savings of 0.38 to 1.12% could be achieved for different climatic seasons when switching the power plant Boilers to the optimized loading.
Hairui Yang - One of the best experts on this subject based on the ideXlab platform.
-
nox emission from a circulating fluidized bed Boiler cofiring coal and corn stalk pellets
Energy & Fuels, 2012Co-Authors: Hairui Yang, Hai Zhang, Xiaolong Qiu, Shi Yang, Qing LiuAbstract:The NOx emission from a circulating fluidized bed (CFB) Boiler with 50 MW rated thermal output (50 MWth) during the cofiring of anthracite coal and pelletized corn stalk biomass was investigated. Cofiring could improve combustion efficiency and, thus, the thermal efficiency of the Boiler. However, contrary to most results found in bubbling fluidized bed (BFB) combustors and the one found in a CFB Boiler burning rice husk, NOx concentration in flue gas and Fuel nitrogen conversion ratio increased with the biomass mass fraction. Several causes for such a contradiction were discussed and the configuration in combination with feedstock location of biomass was regarded as the most important one. In a CFB Boiler, Fuel is mostly burnt above the dense bed, opposite to that in a BFB Boiler, and, thus, the average oxygen concentration above the dense bed, where biomass was fed, was higher. High bed temperature and high primary air ratio used for burning the anthracite coal increased NOx emission and enhanced the va...