The Experts below are selected from a list of 51 Experts worldwide ranked by ideXlab platform

Yongping Yang - One of the best experts on this subject based on the ideXlab platform.

  • parametric analysis and process optimization of Steam Cycle in double Reheat ultra supercritical power plants
    Applied Thermal Engineering, 2016
    Co-Authors: Luyao Zhou, Shifei Zhao, Gang Xu, Cheng Xu, Yongping Yang
    Abstract:

    Abstract Parametric analysis and process optimization of Steam Cycle in double Reheat ultra-supercritical power plants were performed in this study. Thermal and economic analyses were presented to reveal the benefits brought from the parametric analysis and process optimization. Parametric analysis of Reheat pressure was firstly carried out to improve thermal performance of the double Reheat Steam Cycle with eight-stage regenerative heaters. An optimized process of Steam Cycle with ten-stage regenerative heaters was put forward to further improve thermal performance of the double Reheat power plant. The results showed that the power generation efficiency of the double Reheat power plant could increase by 0.49 percentage point by parametric and process optimization. The economic analysis revealed that the cost of electricity of the double Reheat power plant with both optimized process and parameters will decrease from 49.55 $/MWh to 49.07 $/MWh. This study could indicate that parametric analysis and process optimization of the Steam Cycle can both improve thermal and economic performances of double Reheat ultra-supercritical power plants.

Luyao Zhou - One of the best experts on this subject based on the ideXlab platform.

  • parametric analysis and process optimization of Steam Cycle in double Reheat ultra supercritical power plants
    Applied Thermal Engineering, 2016
    Co-Authors: Luyao Zhou, Shifei Zhao, Gang Xu, Cheng Xu, Yongping Yang
    Abstract:

    Abstract Parametric analysis and process optimization of Steam Cycle in double Reheat ultra-supercritical power plants were performed in this study. Thermal and economic analyses were presented to reveal the benefits brought from the parametric analysis and process optimization. Parametric analysis of Reheat pressure was firstly carried out to improve thermal performance of the double Reheat Steam Cycle with eight-stage regenerative heaters. An optimized process of Steam Cycle with ten-stage regenerative heaters was put forward to further improve thermal performance of the double Reheat power plant. The results showed that the power generation efficiency of the double Reheat power plant could increase by 0.49 percentage point by parametric and process optimization. The economic analysis revealed that the cost of electricity of the double Reheat power plant with both optimized process and parameters will decrease from 49.55 $/MWh to 49.07 $/MWh. This study could indicate that parametric analysis and process optimization of the Steam Cycle can both improve thermal and economic performances of double Reheat ultra-supercritical power plants.

Jonshagen Klas - One of the best experts on this subject based on the ideXlab platform.

  • A Novel Approach of Retrofitting a Combined Cycle With Post Combustion CO2 Capture
    'ASME International', 2011
    Co-Authors: Jonshagen Klas, Sipocz Nikolett, Genrup Magnus
    Abstract:

    Most state-of-the-art natural gas-fired combined Cycle (NGCC) plants are triple-pressure Reheat Cycles with efficiencies close to 60%. However, with carbon capture and storage, the efficiency will be penalized by almost 10% units. To limit the energy consumption for a carbon capture NGCC plant, exhaust gas recirculation (EGR) is necessary. Utilizing EGR increases the CO2 content in the gas turbine exhaust while it reduces the flue gas flow to be treated in the capture plant. Nevertheless, due to EGR, the gas turbine will experience a different media with different properties compared with the design case. This study looks into how the turbomachinery reacts to EGR. The work also discusses the potential of further improvements by utilizing pressurized water rather than extraction Steam as the heat source for the CO2 stripper. The results show that the required low-pressure level should be elevated to a point close to the intermediate-pressure to achieve optimum efficiency, hence, one pressure level can be omitted. The main tool used for this study is an in-house off-design model based on fully dimensionless groups programmed in the commercially available heat and mass balance program IPSEPRO. The model is based on a GE 109FB machine with a triple-pressure Reheat Steam Cycle. [DOI: 10.1115/1.4001988

  • Optimal Combined Cycle For Co2 Capture With EGR
    'ASME International', 2010
    Co-Authors: Jonshagen Klas, Sipocz Nikolett, Genrup Magnus
    Abstract:

    Most state-of-the-art natural gas fired combined Cycle (NGCC) plants are triple-pressure Reheat Cycles with efficiencies close to 60 percent. However, with carbon capture and storage, the efficiency will be penalized by almost 10 percent units. To limit the energy consumption for a carbon capture NGCC plant, exhaust gas recirculation (EGR) is necessary. Utilizing EGR increases the CO2 content in the gas turbine exhaust while it reduces the flue gas flow to be treated in the capture plant. Nevertheless, due to EGR, the gas turbine will experience a different: media with different properties compared to the design case. This study looks into how the turbo machinery reacts to EGR. The work also discusses the potential of further improvements by utilizing pressurized water rather than extraction Steam as the heat source for the CO2 stripper. The results show that the required low-pressure level should be elevated to a point close to the intermediate-pressure to achieve optimum efficiency; hence one pressure level can be omitted. The main tool used for this study is an in-house off-design model based on fully dimensionless groups programmed in the commercially-available heat and mass balance program IPSEpro. The model is based on a GE 109FB machine with a triple-pressure Reheat Steam Cycle

  • Low-Calorific Fuel Mix In A Large Size Combined Cycle Plant
    'ASME International', 2009
    Co-Authors: Jonshagen Klas, Genrup Magnus, Eriksson Pontus
    Abstract:

    This paper will address the effects of mixing low-calorific fuel in to a natural gas fuelled large size combined Cycle plant. Three different biofuels are tested namely; air blown gasification gas, indirect gasification gas and digestion gas. Simulations have been performed from 0-100% biofuel natural gas mixtures. The biofuel impacts on the full Cycle performance are discussed. Some more in-depth discussion about turbo-machinery components will be introduced when needed for the discussion. The compressors pressure ratio will increase in order to push the inert ballast of the low calorific fuels trough the turbine. Despite the increased expansion ratio in the gas turbine, the exhaust temperature raises slightly which derives from changed gas properties. The work is based on an in-house advanced off-design model within the software package IPSEPro. Sweden's newest plant "Oresundsverket", which is a combined heat and power (CHP) plant, is used as a basis for the Investigation. The plant is based on a GE Frame-9 gas turbine and has a triple-pressure Reheat Steam Cycle

Genrup Magnus - One of the best experts on this subject based on the ideXlab platform.

  • A Novel Approach of Retrofitting a Combined Cycle With Post Combustion CO2 Capture
    'ASME International', 2011
    Co-Authors: Jonshagen Klas, Sipocz Nikolett, Genrup Magnus
    Abstract:

    Most state-of-the-art natural gas-fired combined Cycle (NGCC) plants are triple-pressure Reheat Cycles with efficiencies close to 60%. However, with carbon capture and storage, the efficiency will be penalized by almost 10% units. To limit the energy consumption for a carbon capture NGCC plant, exhaust gas recirculation (EGR) is necessary. Utilizing EGR increases the CO2 content in the gas turbine exhaust while it reduces the flue gas flow to be treated in the capture plant. Nevertheless, due to EGR, the gas turbine will experience a different media with different properties compared with the design case. This study looks into how the turbomachinery reacts to EGR. The work also discusses the potential of further improvements by utilizing pressurized water rather than extraction Steam as the heat source for the CO2 stripper. The results show that the required low-pressure level should be elevated to a point close to the intermediate-pressure to achieve optimum efficiency, hence, one pressure level can be omitted. The main tool used for this study is an in-house off-design model based on fully dimensionless groups programmed in the commercially available heat and mass balance program IPSEPRO. The model is based on a GE 109FB machine with a triple-pressure Reheat Steam Cycle. [DOI: 10.1115/1.4001988

  • Optimal Combined Cycle For Co2 Capture With EGR
    'ASME International', 2010
    Co-Authors: Jonshagen Klas, Sipocz Nikolett, Genrup Magnus
    Abstract:

    Most state-of-the-art natural gas fired combined Cycle (NGCC) plants are triple-pressure Reheat Cycles with efficiencies close to 60 percent. However, with carbon capture and storage, the efficiency will be penalized by almost 10 percent units. To limit the energy consumption for a carbon capture NGCC plant, exhaust gas recirculation (EGR) is necessary. Utilizing EGR increases the CO2 content in the gas turbine exhaust while it reduces the flue gas flow to be treated in the capture plant. Nevertheless, due to EGR, the gas turbine will experience a different: media with different properties compared to the design case. This study looks into how the turbo machinery reacts to EGR. The work also discusses the potential of further improvements by utilizing pressurized water rather than extraction Steam as the heat source for the CO2 stripper. The results show that the required low-pressure level should be elevated to a point close to the intermediate-pressure to achieve optimum efficiency; hence one pressure level can be omitted. The main tool used for this study is an in-house off-design model based on fully dimensionless groups programmed in the commercially-available heat and mass balance program IPSEpro. The model is based on a GE 109FB machine with a triple-pressure Reheat Steam Cycle

  • Low-Calorific Fuel Mix In A Large Size Combined Cycle Plant
    'ASME International', 2009
    Co-Authors: Jonshagen Klas, Genrup Magnus, Eriksson Pontus
    Abstract:

    This paper will address the effects of mixing low-calorific fuel in to a natural gas fuelled large size combined Cycle plant. Three different biofuels are tested namely; air blown gasification gas, indirect gasification gas and digestion gas. Simulations have been performed from 0-100% biofuel natural gas mixtures. The biofuel impacts on the full Cycle performance are discussed. Some more in-depth discussion about turbo-machinery components will be introduced when needed for the discussion. The compressors pressure ratio will increase in order to push the inert ballast of the low calorific fuels trough the turbine. Despite the increased expansion ratio in the gas turbine, the exhaust temperature raises slightly which derives from changed gas properties. The work is based on an in-house advanced off-design model within the software package IPSEPro. Sweden's newest plant "Oresundsverket", which is a combined heat and power (CHP) plant, is used as a basis for the Investigation. The plant is based on a GE Frame-9 gas turbine and has a triple-pressure Reheat Steam Cycle

Shifei Zhao - One of the best experts on this subject based on the ideXlab platform.

  • parametric analysis and process optimization of Steam Cycle in double Reheat ultra supercritical power plants
    Applied Thermal Engineering, 2016
    Co-Authors: Luyao Zhou, Shifei Zhao, Gang Xu, Cheng Xu, Yongping Yang
    Abstract:

    Abstract Parametric analysis and process optimization of Steam Cycle in double Reheat ultra-supercritical power plants were performed in this study. Thermal and economic analyses were presented to reveal the benefits brought from the parametric analysis and process optimization. Parametric analysis of Reheat pressure was firstly carried out to improve thermal performance of the double Reheat Steam Cycle with eight-stage regenerative heaters. An optimized process of Steam Cycle with ten-stage regenerative heaters was put forward to further improve thermal performance of the double Reheat power plant. The results showed that the power generation efficiency of the double Reheat power plant could increase by 0.49 percentage point by parametric and process optimization. The economic analysis revealed that the cost of electricity of the double Reheat power plant with both optimized process and parameters will decrease from 49.55 $/MWh to 49.07 $/MWh. This study could indicate that parametric analysis and process optimization of the Steam Cycle can both improve thermal and economic performances of double Reheat ultra-supercritical power plants.