The Experts below are selected from a list of 52443 Experts worldwide ranked by ideXlab platform
A H Shamsuddin - One of the best experts on this subject based on the ideXlab platform.
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RePowering of existing AL-Hartha gas-fuelled conventional Steam Power plant with molten salt cavity tubular solar central receiver
Clean Technologies and Environmental Policy, 2014Co-Authors: Mahmood S Jamel, A. Abd Rahman, A H ShamsuddinAbstract:This paper introduces a new method to rePower the existing equipment of the AL-Hartha Steam plant located in Basra, Iraq, using a molten salt cavity tubular solar central receiver (SCR). Cycle Tempo is used to simulate the existing natural gas-fuelled conventional Steam Power cycle with consideration of the heat and pressure losses. The heliostat field and the central receiver subsystems are coded using MATLAB. The model couples the heat balance with the temperature computation of the receiver walls for calculation and analysis of the thermal losses. The proposed modified codes are capable of calculating heat losses, evaluating the integrated Power plant and satisfying a wide range of SCRs. The results are verified against plant data and previous works in the literature and good agreement is obtained. The results show the potential of using a molten salt cavity tubular SCR for low-range temperature feedwater preheating, as well as the optimum scheme for the integration of the existing plant with an SCR. It is observed that the maximum improvement for the existing AL-Hartha Steam plant and the integrated molten salt cavity tubular SCR is obtained by substituting the bleed Steam in all the high-pressure feedwater heaters. For this scheme, the obtained receiver energy efficiency reaches up to 94.1 % and the maximum reduction in instantaneous gas fuel consumption is about 10.1 % with a solar-electricity improvement of about 21.6 % over the design case.
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simulation of existing gas fuelled conventional Steam Power plant using cycle tempo
IOP Conference Series: Earth and Environmental Science, 2013Co-Authors: Mahmood S Jamel, Adlansyah Abd Rahman, A H ShamsuddinAbstract:Simulation of a 200 MW gas-fuelled conventional Steam Power plant located in Basra, Iraq was carried out. The thermodynamic performance of the considered Power plant is estimated by a system simulation. A flow-sheet computer program, "Cycle-Tempo" is used for the study. The plant components and piping systems were considered and described in detail. The simulation results were verified against data gathered from the log sheet obtained from the station during its operation hours and good results were obtained. Operational factors like the stack exhaust temperature and excess air percentage were studied and discussed, as were environmental factors, such as ambient air temperature and water inlet temperature. In addition, detailed exergy losses were illustrated and describe the temperature profiles for the main plant components. The results prompted many suggestions for improvement of the plant performance.
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Advantages of Integration Molten Salt Cavity Tubular Solar Central Receiver to the Boiler of Existing Gas-Fuelled Conventional Steam Power
2013Co-Authors: Mahmood S Jamel, Abd A Rahman, A H ShamsuddinAbstract:Abstract: This paper introduces a new method to integrate the economizer of the AL-Hartha Steam plant located in Basra, Iraq, using a molten salt cavity tubular solar central receiver (SCR). Cycle Tempo is used to simulate the existing natural gas-fuelled conventional Steam Power cycle with consideration of the heat and pressure losses. The heliostat field and the central receiver subsystems are coded using MATLAB. The model couples the heat balance with the temperature computation of the receiver walls for calculation and analysis of the thermal losses. The proposed modified codes are capable of calculating heat losses, evaluating the integrated Power plant and satisfying a wide range of SCRs. The results are verified against plant data and previous works in the literature and good agreement is obtained. The results show the potential of using a molten salt cavity tubular SCR for low-range temperature in boiling process in the plant boiler, the economizer part. It is observed that the obtained receiver energy efficiency can reaches up to 94.1% and the maximum reduction in instantaneous gas fuel consumption is about 9.1%
Ulrich Liebenthal - One of the best experts on this subject based on the ideXlab platform.
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post combustion co2 capture chemical absorption processes in coal fired Steam Power plants
Greenhouse Gases-Science and Technology, 2012Co-Authors: Jochen Oexmann, Sebastian Linnenberg, Alfons Kather, Ulrich LiebenthalAbstract:The integration of a post-combustion CO2 capture unit in a coal-fired Steam Power plant leads to a reduction in net Power output, where the largest contributors to the Power loss are the heat requirement for the regeneration of the chemical solvent in the desorber of the CO2 capture unit (approx. 2/3) and the auxiliary Power demand of the CO2 compressor (approx. 1/4). In this review, the layout of the overall process is explained and the interaction of the three sub-processes Power plant, CO2 capture process and CO2 compressor is discussed. The optimization of process parameters of the CO2 capture unit – such as solution flow rate and reboiler temperature – is intricate due to the complex interaction of the sub-processes. It is shown that although the heat requirement for solvent regeneration has the largest impact on the Power output of the overall process, the optimal process parameters that lead to the lowest possible heat requirement of the capture unit do not necessarily coincide with the optimal process parameters that make for the most energy efficient operation of the overall process. Therefore, when optimizing process parameters of CO2 absorption processes in Power plants, one should focus on the minimization of the overall Power loss instead of solely reducing the heat requirement for solvent regeneration. The described coherences are illustrated by the results of process simulations based on detailed models of a post-combustion CO2 capture unit using 7 m (30 wt.-%) monoethanolamine (MEA), of a supercritical, hard-coal-fired Steam Power plant and of a six-stage, intercooled CO2 compressor. © 2012 Society of Chemical Industry and John Wiley & Sons, Ltd
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derivation of correlations to evaluate the impact of retrofitted post combustion co2 capture processes on Steam Power plant performance
International Journal of Greenhouse Gas Control, 2011Co-Authors: Ulrich Liebenthal, Sebastian Linnenberg, Jochen Oexmann, Alfons KatherAbstract:Abstract When 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.
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derivation of Power loss factors to evaluate the impact of postcombustion co2 capture processes on Steam Power plant performance
Energy Procedia, 2011Co-Authors: Sebastian Linnenberg, Ulrich Liebenthal, Jochen Oexmann, Alfons KatherAbstract:Abstract When integrating a post-combustion CO 2 capture process and a CO 2 compressor 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.
Alfons Kather - One of the best experts on this subject based on the ideXlab platform.
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post combustion co2 capture chemical absorption processes in coal fired Steam Power plants
Greenhouse Gases-Science and Technology, 2012Co-Authors: Jochen Oexmann, Sebastian Linnenberg, Alfons Kather, Ulrich LiebenthalAbstract:The integration of a post-combustion CO2 capture unit in a coal-fired Steam Power plant leads to a reduction in net Power output, where the largest contributors to the Power loss are the heat requirement for the regeneration of the chemical solvent in the desorber of the CO2 capture unit (approx. 2/3) and the auxiliary Power demand of the CO2 compressor (approx. 1/4). In this review, the layout of the overall process is explained and the interaction of the three sub-processes Power plant, CO2 capture process and CO2 compressor is discussed. The optimization of process parameters of the CO2 capture unit – such as solution flow rate and reboiler temperature – is intricate due to the complex interaction of the sub-processes. It is shown that although the heat requirement for solvent regeneration has the largest impact on the Power output of the overall process, the optimal process parameters that lead to the lowest possible heat requirement of the capture unit do not necessarily coincide with the optimal process parameters that make for the most energy efficient operation of the overall process. Therefore, when optimizing process parameters of CO2 absorption processes in Power plants, one should focus on the minimization of the overall Power loss instead of solely reducing the heat requirement for solvent regeneration. The described coherences are illustrated by the results of process simulations based on detailed models of a post-combustion CO2 capture unit using 7 m (30 wt.-%) monoethanolamine (MEA), of a supercritical, hard-coal-fired Steam Power plant and of a six-stage, intercooled CO2 compressor. © 2012 Society of Chemical Industry and John Wiley & Sons, Ltd
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derivation of correlations to evaluate the impact of retrofitted post combustion co2 capture processes on Steam Power plant performance
International Journal of Greenhouse Gas Control, 2011Co-Authors: Ulrich Liebenthal, Sebastian Linnenberg, Jochen Oexmann, Alfons KatherAbstract:Abstract When 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.
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derivation of Power loss factors to evaluate the impact of postcombustion co2 capture processes on Steam Power plant performance
Energy Procedia, 2011Co-Authors: Sebastian Linnenberg, Ulrich Liebenthal, Jochen Oexmann, Alfons KatherAbstract:Abstract When integrating a post-combustion CO 2 capture process and a CO 2 compressor 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.
Mahmood S Jamel - One of the best experts on this subject based on the ideXlab platform.
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RePowering of existing AL-Hartha gas-fuelled conventional Steam Power plant with molten salt cavity tubular solar central receiver
Clean Technologies and Environmental Policy, 2014Co-Authors: Mahmood S Jamel, A. Abd Rahman, A H ShamsuddinAbstract:This paper introduces a new method to rePower the existing equipment of the AL-Hartha Steam plant located in Basra, Iraq, using a molten salt cavity tubular solar central receiver (SCR). Cycle Tempo is used to simulate the existing natural gas-fuelled conventional Steam Power cycle with consideration of the heat and pressure losses. The heliostat field and the central receiver subsystems are coded using MATLAB. The model couples the heat balance with the temperature computation of the receiver walls for calculation and analysis of the thermal losses. The proposed modified codes are capable of calculating heat losses, evaluating the integrated Power plant and satisfying a wide range of SCRs. The results are verified against plant data and previous works in the literature and good agreement is obtained. The results show the potential of using a molten salt cavity tubular SCR for low-range temperature feedwater preheating, as well as the optimum scheme for the integration of the existing plant with an SCR. It is observed that the maximum improvement for the existing AL-Hartha Steam plant and the integrated molten salt cavity tubular SCR is obtained by substituting the bleed Steam in all the high-pressure feedwater heaters. For this scheme, the obtained receiver energy efficiency reaches up to 94.1 % and the maximum reduction in instantaneous gas fuel consumption is about 10.1 % with a solar-electricity improvement of about 21.6 % over the design case.
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simulation of existing gas fuelled conventional Steam Power plant using cycle tempo
IOP Conference Series: Earth and Environmental Science, 2013Co-Authors: Mahmood S Jamel, Adlansyah Abd Rahman, A H ShamsuddinAbstract:Simulation of a 200 MW gas-fuelled conventional Steam Power plant located in Basra, Iraq was carried out. The thermodynamic performance of the considered Power plant is estimated by a system simulation. A flow-sheet computer program, "Cycle-Tempo" is used for the study. The plant components and piping systems were considered and described in detail. The simulation results were verified against data gathered from the log sheet obtained from the station during its operation hours and good results were obtained. Operational factors like the stack exhaust temperature and excess air percentage were studied and discussed, as were environmental factors, such as ambient air temperature and water inlet temperature. In addition, detailed exergy losses were illustrated and describe the temperature profiles for the main plant components. The results prompted many suggestions for improvement of the plant performance.
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Advantages of Integration Molten Salt Cavity Tubular Solar Central Receiver to the Boiler of Existing Gas-Fuelled Conventional Steam Power
2013Co-Authors: Mahmood S Jamel, Abd A Rahman, A H ShamsuddinAbstract:Abstract: This paper introduces a new method to integrate the economizer of the AL-Hartha Steam plant located in Basra, Iraq, using a molten salt cavity tubular solar central receiver (SCR). Cycle Tempo is used to simulate the existing natural gas-fuelled conventional Steam Power cycle with consideration of the heat and pressure losses. The heliostat field and the central receiver subsystems are coded using MATLAB. The model couples the heat balance with the temperature computation of the receiver walls for calculation and analysis of the thermal losses. The proposed modified codes are capable of calculating heat losses, evaluating the integrated Power plant and satisfying a wide range of SCRs. The results are verified against plant data and previous works in the literature and good agreement is obtained. The results show the potential of using a molten salt cavity tubular SCR for low-range temperature in boiling process in the plant boiler, the economizer part. It is observed that the obtained receiver energy efficiency can reaches up to 94.1% and the maximum reduction in instantaneous gas fuel consumption is about 9.1%
Omid Ali Akbari - One of the best experts on this subject based on the ideXlab platform.
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performance assessment and leakage analysis of feed water pre heaters in natural gas fired Steam Power plants
Journal of Power of Technologies, 2018Co-Authors: Gholamreza Ahmadi Sheikh Shabani, Mohammad Ameri, Omid Ali Akbari, Alireza SeifiAbstract:The performance of feed water pre-heaters (FWH) at a Steam Power plant with a capacity of 200 MW is evaluated in this paper. The main objective of this study is to investigate the behavior of these FWHs in various cases. The effect of leakage of condensates on the condenser was also studied in detail. To do this, each FWH was studied separately and also in groups (LP, HP and both groups). While some of the results are exclusive to the studied Power plant, others can be generalized to similar Power plants. The results show that although LPH-1 and LPH-2 have the lowest exergy efficiency, they have the greatest effect on the efficiency of the cycle. Whereas HPH-6 and LPH-4 have the highest heat exchange (31.3 and 21.73 MW), LPH-2 and LPH-1 deliver the greatest positive effect on energy efficiency (0.81% and 0.61/0%). Moreover, the results show the particular importance of preventing any leakage of heater condensate. In the event of leakage along the route to the condensate of heaters, the most negative effect will be due to the HP heaters: 20 kg/s leakage in the HPHs line will cause an increase in CO2 production p.a. of roughly 10150 metric tons. Furthermore, energy efficiency and Power produced will fall by 0.374% and 5.1 MW. In terms of the impact of leakages on the cooling tower, the study showed that LPH-1 and LPH-2 have the greatest effect. The effects of LP and HP FWHs on the energy efficiency of the cycle were 2.53% and 0.82%.
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evaluation of supply boiler rePowering of an existing natural gas fired Steam Power plant
Applied Thermal Engineering, 2017Co-Authors: Omid Ali Akbari, Ali Marzban, Gholamreza AhmadiAbstract:Abstract Using supply boiler to rePower existing Steam Power plants (also known as parallel rePowering) is one of the awesome rePowering methods for almost all types of Steam Power plants. In this way, the capacity of the gas turbine and heat recovery Steam generator (HRSG) can be designed in different ranges. Choosing the best number of HRSG pressure levels and the appropriate way to integrate the generated Steam in the HRSG with the existing cycle are important steps during the cycle design. In this paper, we analyse the effects of HRSG pressure levels on the performance of existing boiler and turbines for Montazeri Steam Power Plant in Iran. To do this, we present three separate HRSG configurations and a multi-parameter analysis is provided. For each case, the effects on existing boiler, Steam turbines and the condenser are examined. The results show that using HRSG with higher pressure levels (2 or 3) are caused an imbalance in mass flow rate of Steam in Steam turbines and different parts of the existing boiler. Therefore, using a single-pressure level HRSG with a reheat is recommended for this aim. If we use one HRSG and a gas turbine model Mitsubishi-701G2, net energy and exergy efficiencies and produced Power will increases %52.19, %50.9 and 485.8 MW, respectively.
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evaluation of synchronous execution of full rePowering and solar assisting in a 200 mw Steam Power plant a case study
Applied Thermal Engineering, 2017Co-Authors: Gholamreza Ahmadi, A. R. Azimian, Davood Toghraie, Omid Ali AkbariAbstract:Abstract This study investigates a full rePowering simultaneously with merging solar energy in 200 MW units of Montazeri Steam Power Plant in Iran. A 400 MW gas turbine has been used for full rePowering. A part of feed water in the solar field turns into saturated Steam. In the rePowered cycle without the involvement of solar energy, the energy and exergy efficiencies have increased by 76.8% and 73% reaching to 59.11% and 56.63%, respectively. In Power increase mode, the mass flow rate of water in solar field is not to be more than 31.3 kg/s. Under this condition, the Power of the Steam turbines will experience a 16.8 MW increase. In efficiency improvement mode, with 75 kg/s feed water in solar field and the generation Power of the Steam turbine to be fixed, the consumption of natural gas by the gas turbine will decrease 2.21 kg/s. This will reduce natural gas consumption and CO2 emissions by 21,481,200 kg and 43,392 ton per year, respectively. Considering the price of natural gas and CO2 to be 0.2 USD/kg and 100 USD/ton respectively, the rewarded profit due to a reduction in both fuel consumption and CO2 emission will be 8,635,440 USD per year.
