The Experts below are selected from a list of 78 Experts worldwide ranked by ideXlab platform
Salman Raza Naqvi - One of the best experts on this subject based on the ideXlab platform.
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Off-grid electricity generation using Mixed Biomass compost: A scenario-based study with sensitivity analysis
Applied Energy, 2017Co-Authors: Muhammad Naqvi, Jinyue Yan, Erik Dahlquist, Salman Raza NaqviAbstract:Abstract The aim of the study is to investigate the viability of waste gasification based off-grid electricity generation utilizing Mixed Biomass composts (Mixture of rice hulls with cow/poultry manure compost). The economic viability is studied on the different scenarios with considerations of (1) levels of electricity demand and utilization, (2) costs of variable Biomass Mix, (3) combined domestic and cottage industry business model, and (4) influence of governmental investments. The levelized cost of electricity (LCOE) is used as an indicator to measure the competitiveness of gasification based off-grid electricity generation. The plant loading and the capacity factor have been used to assess the impacts of different scenarios. A sensitivity analysis of key parameters based on variations in annual operational hours, plant efficiency, plant cost and Biomass supply cost is conducted. Based on levels of electricity demand and utilization, the LCOE ranged between 40 US cents/kW h and 29 US cents/kW h based on the plant loading and the capacity factor. The business revenue would not change considerably despite better plant utilization and reduced levelized cost of electricity if all the consumers, both basic or medium, are charged with the flat tariff. The part load operation will be costly despite considerably low capital investment per kW in comparison with PV or solar based plants. There is a large potential of off-grid electricity generation but the estimated off-grid electricity price is found to be higher in all scenarios than average grid-based electricity tariff. Moreover, the challenges for the implementation of the real off-grid electricity generation plant are discussed.
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Waste Biomass Gasification Based off-grid Electricity Generation: A Case Study in Pakistan
Energy Procedia, 2016Co-Authors: Muhammad Naqvi, Jinyue Yan, Erik Dahlquist, Salman Raza NaqviAbstract:Abstract The objective is to investigate the waste gasification based off-grid electricity generation in developing countries like Pakistan utilizing Mixed Biomass composts (Mixture of agricultural wastes including rice hulls and wheat straw with cow/poultry manure compost). Different scenarios are compared; (1) levels of electricity demand and utilization, (2) costs for variable Biomass Mix, (3) combined domestic and cottage industry business model. The levelized cost of electricity (LCOE) is used as an indicator to measure the competitiveness of off-grid electricity generation. There is a large potential of off-grid electricity generation. However, the estimated off-grid electricity price is found to be higher in all scenarios than average governmental electricity tariff.
Mona Wells - One of the best experts on this subject based on the ideXlab platform.
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improvement in ch4 co2 ratio and ch4 yield as related to Biomass Mix composition during anaerobic co digestion
Waste Management, 2017Co-Authors: Tjalfe G. Poulsen, Laetitia Adelard, Mona WellsAbstract:Sixteen data sets (two of which were measured in this study) with a combined total of 145 measurements of ultimate methane yield (UMY) during mono- and co-digestion of ternary Biomass Mixtures were used to assess impact of co-digestion on the relative change in UMY (ΔUMY) as a function of Biomass Mix composition. The data involved 9 Biomass materials (brewery spent grains, chicken manure, cow manure, fresh grass clippings, pig manure, primary sewage sludge, vegetable food waste, wheat straw, and rice straw). Results of the assessment shows that co-digestion in 85% of yields positive values of ΔUMY regardless of the Biomass materials used, however, a smaller fraction (15%) resulted in negative ΔUMY during co-digestion. The data further indicate that for each set of ternary Biomass material Mixtures there exists an optimal Biomass Mix composition at which ΔUMY is at a maximum. Statistical analyses based on the data used here indicate that the maximum value of ΔUMY (ΔUMYmax) is always positive regardless of Biomass materials being co-digested.
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Improvement in CH4/CO2 ratio and CH4 yield as related to Biomass Mix composition during anaerobic co-digestion.
Waste management (New York N.Y.), 2016Co-Authors: Tjalfe G. Poulsen, Laetitia Adelard, Mona WellsAbstract:Sixteen data sets (two of which were measured in this study) with a combined total of 145 measurements of ultimate methane yield (UMY) during mono- and co-digestion of ternary Biomass Mixtures were used to assess impact of co-digestion on the relative change in UMY (ΔUMY) as a function of Biomass Mix composition. The data involved 9 Biomass materials (brewery spent grains, chicken manure, cow manure, fresh grass clippings, pig manure, primary sewage sludge, vegetable food waste, wheat straw, and rice straw). Results of the assessment shows that co-digestion in 85% of yields positive values of ΔUMY regardless of the Biomass materials used, however, a smaller fraction (15%) resulted in negative ΔUMY during co-digestion. The data further indicate that for each set of ternary Biomass material Mixtures there exists an optimal Biomass Mix composition at which ΔUMY is at a maximum. Statistical analyses based on the data used here indicate that the maximum value of ΔUMY (ΔUMYmax) is always positive regardless of Biomass materials being co-digested.
Muhammad Naqvi - One of the best experts on this subject based on the ideXlab platform.
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Off-grid electricity generation using Mixed Biomass compost: A scenario-based study with sensitivity analysis
Applied Energy, 2017Co-Authors: Muhammad Naqvi, Jinyue Yan, Erik Dahlquist, Salman Raza NaqviAbstract:Abstract The aim of the study is to investigate the viability of waste gasification based off-grid electricity generation utilizing Mixed Biomass composts (Mixture of rice hulls with cow/poultry manure compost). The economic viability is studied on the different scenarios with considerations of (1) levels of electricity demand and utilization, (2) costs of variable Biomass Mix, (3) combined domestic and cottage industry business model, and (4) influence of governmental investments. The levelized cost of electricity (LCOE) is used as an indicator to measure the competitiveness of gasification based off-grid electricity generation. The plant loading and the capacity factor have been used to assess the impacts of different scenarios. A sensitivity analysis of key parameters based on variations in annual operational hours, plant efficiency, plant cost and Biomass supply cost is conducted. Based on levels of electricity demand and utilization, the LCOE ranged between 40 US cents/kW h and 29 US cents/kW h based on the plant loading and the capacity factor. The business revenue would not change considerably despite better plant utilization and reduced levelized cost of electricity if all the consumers, both basic or medium, are charged with the flat tariff. The part load operation will be costly despite considerably low capital investment per kW in comparison with PV or solar based plants. There is a large potential of off-grid electricity generation but the estimated off-grid electricity price is found to be higher in all scenarios than average grid-based electricity tariff. Moreover, the challenges for the implementation of the real off-grid electricity generation plant are discussed.
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Waste Biomass Gasification Based off-grid Electricity Generation: A Case Study in Pakistan
Energy Procedia, 2016Co-Authors: Muhammad Naqvi, Jinyue Yan, Erik Dahlquist, Salman Raza NaqviAbstract:Abstract The objective is to investigate the waste gasification based off-grid electricity generation in developing countries like Pakistan utilizing Mixed Biomass composts (Mixture of agricultural wastes including rice hulls and wheat straw with cow/poultry manure compost). Different scenarios are compared; (1) levels of electricity demand and utilization, (2) costs for variable Biomass Mix, (3) combined domestic and cottage industry business model. The levelized cost of electricity (LCOE) is used as an indicator to measure the competitiveness of off-grid electricity generation. There is a large potential of off-grid electricity generation. However, the estimated off-grid electricity price is found to be higher in all scenarios than average governmental electricity tariff.
Ayhan Demirbas - One of the best experts on this subject based on the ideXlab platform.
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Biomass Co-Firing for Boilers Associated with Environmental Impacts
Energy Sources, 2005Co-Authors: Ayhan DemirbasAbstract:This article is presented to discuss general combustion and emissions issues with Biomass co-firing, as well as specific issues with particular Biomass fuels, such as fouling. The tests of co-firing were carried out in a lab-scale bubbling fluidized bed combustor. Biomass is an attractive and sustainable renewable fuel to supplement coal combustion in utility boilers. Coal and Biomass fuels are quite different in composition. Ash composition for the Biomass is fundamentally different from ash composition for coal. Chlorine in the Biomass may affect operation by corrosion. Ash deposits reduce heat transfer and may also result in severe corrosion at high temperatures. Biomass and coal blend combustion is a promising combustion technology; however, significant development work is required before large-scale implementation can be realized. Coal co-firing was successful with up to a 20% Biomass Mix boilers. Issues related to successful implementation of coal Biomass blend combustion are identified. Co-firing o...
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Sustainable cofiring of Biomass with coal
Energy Conversion and Management, 2003Co-Authors: Ayhan DemirbasAbstract:Biomass is an attractive renewable fuel to supplement coal combustion in utility boilers. Coal cofiring was successful with up to a 20% Biomass Mix. Results of extensive applications have shown that cofiring of Biomass with coal have accomplished the following: (1) increased boiler efficiency, (2) reduced fuel costs and (3) reduced emissions of NOx and fossil CO2. Every ton of Biomass cofired directly reduces fossil CO2 emissions by over 1 ton. Woody Biomass contains virtually no sulfur, so SO2 emissions are reduced in direct proportion to the coal replacement. Biomass is a regenerable biofuel. When a fossil fuel is replaced by a biofuel, there is a net reduction in CO2 emissions. Biomass can contain considerable alkali and alkaline earth elements and chlorine, which, when Mixed with other gas components derived from coal such as sulfur compounds, promotes a different array of vapor and fine particulate deposition in coal fired boilers.
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Biomass Co-firing for Coal-Fired Boilers
Energy Exploration & Exploitation, 2003Co-Authors: Ayhan DemirbasAbstract:In this study ground Biomass and pulverized coal were used for co-firing test. The tests of co-firing of coal and Biomass were carried out in a bench-scale bubbling fluidized bed combustor. Biomass is an attractive and sustainable renewable fuel to supplement coal combustion in utility boilers. Coal co-firing was successful with up to a 20% Biomass Mix boilers. Coal and Biomass fuels are quite different in composition. Ash composition for the Biomass is fundamentally different from ash composition for the coal. Chlorine in the Biomass may affect operation by corrosion. Ash deposits reduce heat transfer and may also result in severe corrosion at high temperatures. Biomass and coal blend combustion is a promising combustion technology; however, significant development work is required before large-scale implementation can be realized. Issues related to successful implementation of coal Biomass blend combustion are identified. Co-firing of coal and Biomass is an effective method of control NOx. Formation of ...
Tjalfe G. Poulsen - One of the best experts on this subject based on the ideXlab platform.
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improvement in ch4 co2 ratio and ch4 yield as related to Biomass Mix composition during anaerobic co digestion
Waste Management, 2017Co-Authors: Tjalfe G. Poulsen, Laetitia Adelard, Mona WellsAbstract:Sixteen data sets (two of which were measured in this study) with a combined total of 145 measurements of ultimate methane yield (UMY) during mono- and co-digestion of ternary Biomass Mixtures were used to assess impact of co-digestion on the relative change in UMY (ΔUMY) as a function of Biomass Mix composition. The data involved 9 Biomass materials (brewery spent grains, chicken manure, cow manure, fresh grass clippings, pig manure, primary sewage sludge, vegetable food waste, wheat straw, and rice straw). Results of the assessment shows that co-digestion in 85% of yields positive values of ΔUMY regardless of the Biomass materials used, however, a smaller fraction (15%) resulted in negative ΔUMY during co-digestion. The data further indicate that for each set of ternary Biomass material Mixtures there exists an optimal Biomass Mix composition at which ΔUMY is at a maximum. Statistical analyses based on the data used here indicate that the maximum value of ΔUMY (ΔUMYmax) is always positive regardless of Biomass materials being co-digested.
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Improvement in CH4/CO2 ratio and CH4 yield as related to Biomass Mix composition during anaerobic co-digestion.
Waste management (New York N.Y.), 2016Co-Authors: Tjalfe G. Poulsen, Laetitia Adelard, Mona WellsAbstract:Sixteen data sets (two of which were measured in this study) with a combined total of 145 measurements of ultimate methane yield (UMY) during mono- and co-digestion of ternary Biomass Mixtures were used to assess impact of co-digestion on the relative change in UMY (ΔUMY) as a function of Biomass Mix composition. The data involved 9 Biomass materials (brewery spent grains, chicken manure, cow manure, fresh grass clippings, pig manure, primary sewage sludge, vegetable food waste, wheat straw, and rice straw). Results of the assessment shows that co-digestion in 85% of yields positive values of ΔUMY regardless of the Biomass materials used, however, a smaller fraction (15%) resulted in negative ΔUMY during co-digestion. The data further indicate that for each set of ternary Biomass material Mixtures there exists an optimal Biomass Mix composition at which ΔUMY is at a maximum. Statistical analyses based on the data used here indicate that the maximum value of ΔUMY (ΔUMYmax) is always positive regardless of Biomass materials being co-digested.