The Experts below are selected from a list of 81 Experts worldwide ranked by ideXlab platform
D.g. Kröger - One of the best experts on this subject based on the ideXlab platform.
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Initial analysis on the novel Spiky Central Receiver Air Pre-Heater (SCRAP) pressurized Air receiver
Energy Procedia, 2015Co-Authors: Matti Lubkoll, T.w. Von Backström, T.m. Harms, D.g. KrögerAbstract:Abstract A combined cycle (CC) concentrating solar power (CSP) plant provides significant potential to achieve an efficiency increase and an electricity cost reduction compared to current single-cycle plants. A CC CSP system requires a receiver technology capable of effectively transferring heat from concentrated solar irradiation to a pressurized Air stream in a gas turbine. The small number of pressurized Air receivers demonstrated to date have practical limitations, when operating at high temperatures and pressures. As yet, a robust, scalable and efficient system has to be developed and commercialized. A novel receiver system, the Spiky Central Receiver Air Pre-Heater (SCRAP) concept has been proposed to comply with these requirements. The SCRAP system is conceived as a solution for an efficient and robust pressurized Air receiver that could be implemented in CC CSP concepts or standalone solar Brayton cycles without a bottoming Rankine cycle. The presented work forms part of an initial analysis intended to provide an answer to whether the proposed SCRAP concept can effectively absorb the concentrated solar radiation and transfer the captured heat into a pressurized Air stream in a robust and cost-effective manner, while maintaining an acceptable pressure-drop. A ray-tracing study was executed to identify the sensitivity of the SCRAP receiver to optical plant parameters, such as the heliostat size. A one-dimensional heat transfer analysis was initiated to develop initial understanding of the thermal system behavior and generate a tool for rapid geometry optimization.
Xuwei Zhang - One of the best experts on this subject based on the ideXlab platform.
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thermo economic analyses on a new conceptual system of waste heat recovery integrated with an s co2 cycle for coal fired power plants
Energy Conversion and Management, 2018Co-Authors: Xuwei ZhangAbstract:Abstract Waste heat recovery from boiler exhaust flue-gas is an effective way to save energy in coal-fired power plants. The integration of a low-pressure economizer (LPE) is a conventional choice for waste heat recovery. In this study, thermodynamic analyses of a coal-fired power plant (CFPP) integrated with an LPE is conducted on a 600 MW CFPP as reference case. Standard coal consumption rate (SCCR) of the power plant could be decreased by 1.76 g·(kW h) −1 by the LPE. Exergetic analysis reveals that significant irreversibility is exhibited by the Air Pre-Heater (APH) of the waste heat recovery system with an LPE. Guided by the exergetic analysis of the conventional waste heat recovery system, a new conceptual system for waste heat recovery integrated with an S-CO 2 cycle for CFPPs is designed in this study. In this novel system, the boiler flue-gas is split into two flows: one to heat Air in APH, and another to drive an S-CO 2 power cycle as the heat source. Parameters of the S-CO 2 power cycle are thermodynamically optimized with the help of Genetic Algorithm. Optimal initial pressure and pressure ratio are 9.136 MPa and 5.84, respectively. Maximum cycle efficiency of the S-CO 2 power cycle is 17.39%. With the optimal parameters, SCCR of the CFPP integrated with the S-CO 2 power cycle decreases by 3.80 g·(kW h) −1 . If the LPE is further integrated, the reduction of SCCR can reach 5.19 g·(kW h) −1 . The essential reason for the significant energy saving is revealed through exergetic analysis. Exergy losses and destructions also decrease significantly in the novel waste heat recovery system. Finally, the economic performance of the proposed system is evaluated. Results show that the novel waste heat recovery system is economically suitable, and that capital investment could be recycled in 3.067 years.
Matti Lubkoll - One of the best experts on this subject based on the ideXlab platform.
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Initial analysis on the novel Spiky Central Receiver Air Pre-Heater (SCRAP) pressurized Air receiver
Energy Procedia, 2015Co-Authors: Matti Lubkoll, T.w. Von Backström, T.m. Harms, D.g. KrögerAbstract:Abstract A combined cycle (CC) concentrating solar power (CSP) plant provides significant potential to achieve an efficiency increase and an electricity cost reduction compared to current single-cycle plants. A CC CSP system requires a receiver technology capable of effectively transferring heat from concentrated solar irradiation to a pressurized Air stream in a gas turbine. The small number of pressurized Air receivers demonstrated to date have practical limitations, when operating at high temperatures and pressures. As yet, a robust, scalable and efficient system has to be developed and commercialized. A novel receiver system, the Spiky Central Receiver Air Pre-Heater (SCRAP) concept has been proposed to comply with these requirements. The SCRAP system is conceived as a solution for an efficient and robust pressurized Air receiver that could be implemented in CC CSP concepts or standalone solar Brayton cycles without a bottoming Rankine cycle. The presented work forms part of an initial analysis intended to provide an answer to whether the proposed SCRAP concept can effectively absorb the concentrated solar radiation and transfer the captured heat into a pressurized Air stream in a robust and cost-effective manner, while maintaining an acceptable pressure-drop. A ray-tracing study was executed to identify the sensitivity of the SCRAP receiver to optical plant parameters, such as the heliostat size. A one-dimensional heat transfer analysis was initiated to develop initial understanding of the thermal system behavior and generate a tool for rapid geometry optimization.
T.m. Harms - One of the best experts on this subject based on the ideXlab platform.
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Initial analysis on the novel Spiky Central Receiver Air Pre-Heater (SCRAP) pressurized Air receiver
Energy Procedia, 2015Co-Authors: Matti Lubkoll, T.w. Von Backström, T.m. Harms, D.g. KrögerAbstract:Abstract A combined cycle (CC) concentrating solar power (CSP) plant provides significant potential to achieve an efficiency increase and an electricity cost reduction compared to current single-cycle plants. A CC CSP system requires a receiver technology capable of effectively transferring heat from concentrated solar irradiation to a pressurized Air stream in a gas turbine. The small number of pressurized Air receivers demonstrated to date have practical limitations, when operating at high temperatures and pressures. As yet, a robust, scalable and efficient system has to be developed and commercialized. A novel receiver system, the Spiky Central Receiver Air Pre-Heater (SCRAP) concept has been proposed to comply with these requirements. The SCRAP system is conceived as a solution for an efficient and robust pressurized Air receiver that could be implemented in CC CSP concepts or standalone solar Brayton cycles without a bottoming Rankine cycle. The presented work forms part of an initial analysis intended to provide an answer to whether the proposed SCRAP concept can effectively absorb the concentrated solar radiation and transfer the captured heat into a pressurized Air stream in a robust and cost-effective manner, while maintaining an acceptable pressure-drop. A ray-tracing study was executed to identify the sensitivity of the SCRAP receiver to optical plant parameters, such as the heliostat size. A one-dimensional heat transfer analysis was initiated to develop initial understanding of the thermal system behavior and generate a tool for rapid geometry optimization.
T.w. Von Backström - One of the best experts on this subject based on the ideXlab platform.
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Initial analysis on the novel Spiky Central Receiver Air Pre-Heater (SCRAP) pressurized Air receiver
Energy Procedia, 2015Co-Authors: Matti Lubkoll, T.w. Von Backström, T.m. Harms, D.g. KrögerAbstract:Abstract A combined cycle (CC) concentrating solar power (CSP) plant provides significant potential to achieve an efficiency increase and an electricity cost reduction compared to current single-cycle plants. A CC CSP system requires a receiver technology capable of effectively transferring heat from concentrated solar irradiation to a pressurized Air stream in a gas turbine. The small number of pressurized Air receivers demonstrated to date have practical limitations, when operating at high temperatures and pressures. As yet, a robust, scalable and efficient system has to be developed and commercialized. A novel receiver system, the Spiky Central Receiver Air Pre-Heater (SCRAP) concept has been proposed to comply with these requirements. The SCRAP system is conceived as a solution for an efficient and robust pressurized Air receiver that could be implemented in CC CSP concepts or standalone solar Brayton cycles without a bottoming Rankine cycle. The presented work forms part of an initial analysis intended to provide an answer to whether the proposed SCRAP concept can effectively absorb the concentrated solar radiation and transfer the captured heat into a pressurized Air stream in a robust and cost-effective manner, while maintaining an acceptable pressure-drop. A ray-tracing study was executed to identify the sensitivity of the SCRAP receiver to optical plant parameters, such as the heliostat size. A one-dimensional heat transfer analysis was initiated to develop initial understanding of the thermal system behavior and generate a tool for rapid geometry optimization.