The Experts below are selected from a list of 62805 Experts worldwide ranked by ideXlab platform
J M Beer - One of the best experts on this subject based on the ideXlab platform.
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high efficiency Electric Power Generation the environmental role
Progress in Energy and Combustion Science, 2007Co-Authors: J M BeerAbstract:Abstract Electric Power Generation system development is reviewed with special attention to plant efficiency. It is generally understood that efficiency improvement that is consistent with high plant reliability and low cost of Electricity is economically beneficial, but its effect upon reduction of all plant emissions without installation of additional environmental equipment, is less well appreciated. As CO 2 emission control is gaining increasing acceptance, efficiency improvement, as the only practical tool capable of reducing CO 2 emission from fossil fuel plant in the short term, has become a key concept for the choice of technology for new plant and upgrades of existing plant. Efficiency is also important for longer-term solutions of reducing CO 2 emission by carbon capture and sequestration (CCS); it is essential for the underlying plants to be highly efficient so as to mitigate the energy penalty of CCS technology application. Power generating options, including coal-fired Rankine cycle steam plants with advanced steam parameters, natural gas-fired gas turbine-steam, and coal gasification combined cycle plants are discussed and compared for their efficiency, cost and operational availability. Special attention is paid to the timeline of the various technologies for their development, demonstration and commercial availability for deployment.
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high efficiency Electric Power Generation the environmental role
Progress in Energy and Combustion Science, 2007Co-Authors: J M BeerAbstract:Abstract Electric Power Generation system development is reviewed with special attention to plant efficiency. It is generally understood that efficiency improvement that is consistent with high plant reliability and low cost of Electricity is economically beneficial, but its effect upon reduction of all plant emissions without installation of additional environmental equipment, is less well appreciated. As CO 2 emission control is gaining increasing acceptance, efficiency improvement, as the only practical tool capable of reducing CO 2 emission from fossil fuel plant in the short term, has become a key concept for the choice of technology for new plant and upgrades of existing plant. Efficiency is also important for longer-term solutions of reducing CO 2 emission by carbon capture and sequestration (CCS); it is essential for the underlying plants to be highly efficient so as to mitigate the energy penalty of CCS technology application. Power generating options, including coal-fired Rankine cycle steam plants with advanced steam parameters, natural gas-fired gas turbine-steam, and coal gasification combined cycle plants are discussed and compared for their efficiency, cost and operational availability. Special attention is paid to the timeline of the various technologies for their development, demonstration and commercial availability for deployment.
Martin O Saar - One of the best experts on this subject based on the ideXlab platform.
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combining natural gas recovery and co2 based geothermal energy extraction for Electric Power Generation
Applied Energy, 2020Co-Authors: Justin Ezekiel, Martin O Saar, Anozie Ebigbo, Benjamin M AdamsAbstract:Abstract We investigate the potential for extracting heat from produced natural gas and utilizing supercritical carbon dioxide (CO2) as a working fluid for the dual purpose of enhancing gas recovery (EGR) and extracting geothermal energy (CO2-Plume Geothermal – CPG) from deep natural gas reservoirs for Electric Power Generation, while ultimately storing all of the subsurface-injected CO2. Thus, the approach constitutes a CO2 capture double-utilization and storage (CCUUS) system. The synergies achieved by the above combinations include shared infrastructure and subsurface working fluid. We integrate the reservoir processes with the wellbore and surface Power-Generation systems such that the combined system’s Power output can be optimized. Using the subsurface fluid flow and heat transport simulation code TOUGH2, coupled to a wellbore heat-transfer model, we set up an anticlinal natural gas reservoir model and assess the technical feasibility of the proposed system. The simulations show that the injection of CO2 for natural gas recovery and for the establishment of a CO2 plume (necessary for CPG) can be conveniently combined. During the CPG stage, following EGR, a CO2-circulation mass flowrate of 110 kg/s results in a maximum net Power output of 2 MWe for this initial, conceptual, small system, which is scalable. After a decade, the net Power decreases when thermal breakthrough occurs at the production wells. The results confirm that the combined system can improve the gas field’s overall energy production, enable CO2 sequestration, and extend the useful lifetime of the gas field. Hence, deep (partially depleted) natural gas reservoirs appear to constitute ideal sites for the deployment of not only geologic CO2 storage but also CPG.
Chuanshan Tian - One of the best experts on this subject based on the ideXlab platform.
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mechanism of Electric Power Generation from ionic droplet motion on polymer supported graphene
Journal of the American Chemical Society, 2018Co-Authors: Shanshan Yang, Yuanbo Zhang, Markus B Raschke, Mengxin Ren, Yan Chen, Jianlu Wang, Wanlin Guo, Ron Y Shen, Chuanshan TianAbstract:Graphene-based Electric Power Generation that converts mechanical energy of flow of ionic droplets over the device surface into Electricity has emerged as a promising candidate for blue-energy network. Yet the lack of a microscopic understanding of the underlying mechanism has prevented ability to optimize and control the performance of such devices. This requires information on interfacial structure and charging behavior at the molecular level. Here, we use sum-frequency vibrational spectroscopy to study the roles of solvated ions, graphene, surface moiety on substrate and water molecules at the aqueous solution/graphene/polymer interface. We discover that the surface dipole layer of the neutral polymer is responsible for ion attraction toward and adsorption at the graphene surface that leads to Electricity Generation in graphene. Graphene itself does not attract ions and only acts as a conducting sheet for the induced carrier transport. Replacing the polymer by an organic ferroElectric substrate could allow switching of the Electricity Generation with long durability. Our microscopic understanding of the Electricity Generation process paves the way for the rational design of scalable and more efficient droplet-motion-based energy transducer devices.
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mechanism of Electric Power Generation from ionic droplet motion on polymer supported graphene
arXiv: Applied Physics, 2018Co-Authors: Shanshan Yang, Yuanbo Zhang, Markus B Raschke, Mengxin Ren, Yan Chen, Jianlu Wang, Wanlin Guo, Ron Y Shen, Chuanshan TianAbstract:Graphene-based Electric Power Generation that converts mechanical energy of flow of ionic droplets over the device surface into Electricity has emerged as promising candidate for a blue-energy network. Yet the lack of a microscopic understanding of the underlying mechanism has prevented ability to optimize and control the performance of such devices. This requires information on interfacial structure and charging behavior at the molecular level. Here, we use sum-frequency vibrational spectroscopy (SFVS) to probe the interfaces of devices composed of aqueous solution, graphene and supporting polymer substrate. We discover that the surface dipole layer of the polymer is responsible for ion attraction toward and adsorption at the graphene surface that leads to Electricity Generation in graphene. Graphene itself does not attract ions and only acts as a conducting sheet for the induced carrier transport. Replacing the polymer by an organic ferroElectric substrate could enhance the efficiency and allow switching of the Electricity Generation. Our microscopic understanding of the Electricity Generation process paves the way for the rational design of scalable and more efficient droplet-motion-based energy transducer devices.
Sura Tundee - One of the best experts on this subject based on the ideXlab platform.
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Electric Power Generation from solar pond using combination of thermosyphon and thermoElectric modules
Energy Procedia, 2014Co-Authors: Sura Tundee, Narong Srihajong, Suparerk CharmongkolpraditAbstract:Salinity-gradient solar pond is one type of solar collector with the ability to store thermal energy for long period of time and lower cost of construction compared with the other type of solar collector. It can collect and store solar heat at temperatures up to 80°C. A system in which heat from the lower zone is transferred to the hot surface of the thermoElectric modules using gravityassisted heat pipes as thermosyphons has been investigated experimentally.The temperature difference between the lower convective zone and the upper convective zone is applied across the hot and cold surfaces of the thermoElectric modules. In the salinity gradient solar pond, a insulated solar pond with a surface area of 7 m2and a depth of 1.3 m was built at Rajamangala University of Technology Isan Khon Kaen Campus,Thailand to conduct performance experiments. From the results of experiment by using water as working fluid, the temperature of the solar pond in lower convective zone is at 50 °C.It can be seen that the thermoElectric is able to generate Electricity at 36.25 mV. Using R134a as a working fluid, the temperature of heat pond in lower convective zone is at 41 °C.Due to this, thermoElectric generates Electricity at 234.25 mV. Research results in the present work indicate that there is a significant potential for Electric Power Generation from small solar ponds through a simple and passive device incorporating thermosyphons and thermoElectric cells.
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Electric Power Generation from solar pond using combined thermosyphon and thermoElectric modules
Solar Energy, 2011Co-Authors: Randeep Singh, Sura Tundee, Aliakbar AkbarzadehAbstract:Abstract Salinity-gradient solar ponds can collect and store solar heat at temperatures up to 80 °C. As a result, these water bodies act as a renewable source of low grade heat which can be utilized for heating and Power Generation applications. In this paper, design and test result of the combined system of thermosyphon and thermoElectric modules (TTMs) for the Generation of Electricity from low grade thermal sources like solar pond is discussed. In solar ponds, temperature difference in the range 40–60 °C is available between the lower convective zone (LCZ) and the upper convective zone (UCZ) which can be applied across the hot and cold surfaces of the thermoElectric modules to make it work as a Power generator. The designed system utilizes gravity assisted thermosyphon to transfer heat from the hot bottom to the cold top of the solar pond. ThermoElectric cells (TECs) are attached to the top end of the thermosyphon which lies in the UCZ thereby maintaining differential temperature across them. A laboratory scale model based on the proposed combination of thermosyphon and thermoElectric cells was fabricated and tested under the temperature differences that exist in the solar ponds. Result outcomes from the TTM prototype have indicated significant prospects of such system for Power Generation from low grade heat sources particularly for remote area Power supply. A potential advantage of such a system is its ability to continue to provide useful Power output at night time or on cloudy days because of the thermal storage capability of the solar pond.
Shanshan Yang - One of the best experts on this subject based on the ideXlab platform.
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mechanism of Electric Power Generation from ionic droplet motion on polymer supported graphene
Journal of the American Chemical Society, 2018Co-Authors: Shanshan Yang, Yuanbo Zhang, Markus B Raschke, Mengxin Ren, Yan Chen, Jianlu Wang, Wanlin Guo, Ron Y Shen, Chuanshan TianAbstract:Graphene-based Electric Power Generation that converts mechanical energy of flow of ionic droplets over the device surface into Electricity has emerged as a promising candidate for blue-energy network. Yet the lack of a microscopic understanding of the underlying mechanism has prevented ability to optimize and control the performance of such devices. This requires information on interfacial structure and charging behavior at the molecular level. Here, we use sum-frequency vibrational spectroscopy to study the roles of solvated ions, graphene, surface moiety on substrate and water molecules at the aqueous solution/graphene/polymer interface. We discover that the surface dipole layer of the neutral polymer is responsible for ion attraction toward and adsorption at the graphene surface that leads to Electricity Generation in graphene. Graphene itself does not attract ions and only acts as a conducting sheet for the induced carrier transport. Replacing the polymer by an organic ferroElectric substrate could allow switching of the Electricity Generation with long durability. Our microscopic understanding of the Electricity Generation process paves the way for the rational design of scalable and more efficient droplet-motion-based energy transducer devices.
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mechanism of Electric Power Generation from ionic droplet motion on polymer supported graphene
arXiv: Applied Physics, 2018Co-Authors: Shanshan Yang, Yuanbo Zhang, Markus B Raschke, Mengxin Ren, Yan Chen, Jianlu Wang, Wanlin Guo, Ron Y Shen, Chuanshan TianAbstract:Graphene-based Electric Power Generation that converts mechanical energy of flow of ionic droplets over the device surface into Electricity has emerged as promising candidate for a blue-energy network. Yet the lack of a microscopic understanding of the underlying mechanism has prevented ability to optimize and control the performance of such devices. This requires information on interfacial structure and charging behavior at the molecular level. Here, we use sum-frequency vibrational spectroscopy (SFVS) to probe the interfaces of devices composed of aqueous solution, graphene and supporting polymer substrate. We discover that the surface dipole layer of the polymer is responsible for ion attraction toward and adsorption at the graphene surface that leads to Electricity Generation in graphene. Graphene itself does not attract ions and only acts as a conducting sheet for the induced carrier transport. Replacing the polymer by an organic ferroElectric substrate could enhance the efficiency and allow switching of the Electricity Generation. Our microscopic understanding of the Electricity Generation process paves the way for the rational design of scalable and more efficient droplet-motion-based energy transducer devices.