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O V Nazarova - One of the best experts on this subject based on the ideXlab platform.

  • hydrogen air energy storage Gas Turbine System
    Thermal Engineering, 2016
    Co-Authors: A I Schastlivtsev, O V Nazarova
    Abstract:

    A hydrogen–air energy storage Gas-Turbine unit is considered that can be used in both nuclear and centralized power industries. However, it is the most promising when used for power-generating plants based on renewable energy sources (RES). The basic feature of the energy storage System in question is combination of storing the energy in compressed air and hydrogen and oxygen produced by the water electrolysis. Such a process makes the energy storage more flexible, in particular, when applied to RES-based power-generating plants whose generation of power may considerably vary during the course of a day, and also reduces the specific cost of the System by decreasing the required volume of the reservoir. This will allow construction of such Systems in any areas independent of the local topography in contrast to the compressed-air energy storage Gas-Turbine plants, which require large-sized underground reservoirs. It should be noted that, during the energy recovery, the air that arrives from the reservoir is heated by combustion of hydrogen in oxygen, which results in the Gas-Turbine exhaust Gases practically free of substances hazardous to the health and the environment. The results of analysis of a hydrogen–air energy storage Gas-Turbine System are presented. Its layout and the principle of its operation are described and the basic parameters are computed. The units of the System are analyzed and their costs are assessed; the recovery factor is estimated at more than 60%. According to the obtained results, almost all main components of the hydrogen–air energy storage Gas-Turbine System are well known at present; therefore, no considerable RD a difficulty in manufacturing it is the necessity of ensuring the combustion of hydrogen in oxygen as complete as possible and preventing formation of nitric oxides.

  • Hydrogen–air energy storage Gas-Turbine System
    Thermal Engineering, 2016
    Co-Authors: A I Schastlivtsev, O V Nazarova
    Abstract:

    A hydrogen–air energy storage Gas-Turbine unit is considered that can be used in both nuclear and centralized power industries. However, it is the most promising when used for power-generating plants based on renewable energy sources (RES). The basic feature of the energy storage System in question is combination of storing the energy in compressed air and hydrogen and oxygen produced by the water electrolysis. Such a process makes the energy storage more flexible, in particular, when applied to RES-based power-generating plants whose generation of power may considerably vary during the course of a day, and also reduces the specific cost of the System by decreasing the required volume of the reservoir. This will allow construction of such Systems in any areas independent of the local topography in contrast to the compressed-air energy storage Gas-Turbine plants, which require large-sized underground reservoirs. It should be noted that, during the energy recovery, the air that arrives from the reservoir is heated by combustion of hydrogen in oxygen, which results in the Gas-Turbine exhaust Gases practically free of substances hazardous to the health and the environment. The results of analysis of a hydrogen–air energy storage Gas-Turbine System are presented. Its layout and the principle of its operation are described and the basic parameters are computed. The units of the System are analyzed and their costs are assessed; the recovery factor is estimated at more than 60%. According to the obtained results, almost all main components of the hydrogen–air energy storage Gas-Turbine System are well known at present; therefore, no considerable R&D costs are required. A new component of the System is the H_2–O_2 combustion chamber; a difficulty in manufacturing it is the necessity of ensuring the combustion of hydrogen in oxygen as complete as possible and preventing formation of nitric oxides.

  • Hydrogen–air energy storage Gas-Turbine System
    Thermal Engineering, 2016
    Co-Authors: A I Schastlivtsev, O V Nazarova
    Abstract:

    A hydrogen–air energy storage Gas-Turbine unit is considered that can be used in both nuclear and centralized power industries. However, it is the most promising when used for power-generating plants based on renewable energy sources (RES). The basic feature of the energy storage System in question is combination of storing the energy in compressed air and hydrogen and oxygen produced by the water electrolysis. Such a process makes the energy storage more flexible, in particular, when applied to RES-based power-generating plants whose generation of power may considerably vary during the course of a day, and also reduces the specific cost of the System by decreasing the required volume of the reservoir. This will allow construction of such Systems in any areas independent of the local topography in contrast to the compressed-air energy storage Gas-Turbine plants, which require large-sized underground reservoirs. It should be noted that, during the energy recovery, the air that arrives from the reservoir is heated by combustion of hydrogen in oxygen, which results in the Gas-Turbine exhaust Gases practically free of substances hazardous to the health and the environment. The results of analysis of a hydrogen–air energy storage Gas-Turbine System are presented. Its layout and the principle of its operation are described and the basic parameters are computed. The units of the System are analyzed and their costs are assessed; the recovery factor is estimated at more than 60%. According to the obtained results, almost all main components of the hydrogen–air energy storage Gas-Turbine System are well known at present; therefore, no considerable RD a difficulty in manufacturing it is the necessity of ensuring the combustion of hydrogen in oxygen as complete as possible and preventing formation of nitric oxides.

Jacob Brouwer - One of the best experts on this subject based on the ideXlab platform.

  • Stall/surge dynamics of a multi-stage air compressor in response to a load transient of a hybrid solid oxide fuel cell-Gas Turbine System
    Journal of Power Sources, 2017
    Co-Authors: Mohammad Ali Azizi, Jacob Brouwer
    Abstract:

    Abstract A better understanding of turbulent unsteady flows in Gas Turbine Systems is necessary to design and control compressors for hybrid fuel cell-Gas Turbine Systems. Compressor stall/surge analysis for a 4 MW hybrid solid oxide fuel cell-Gas Turbine System for locomotive applications is performed based upon a 1.7 MW multi-stage air compressor. Control strategies are applied to prevent operation of the hybrid SOFC-GT beyond the stall/surge lines of the compressor. Computational fluid dynamics tools are used to simulate the flow distribution and instabilities near the stall/surge line. The results show that a 1.7 MW System compressor like that of a Kawasaki Gas Turbine is an appropriate choice among the industrial compressors to be used in a 4 MW locomotive SOFC-GT with topping cycle design. The multi-stage radial design of the compressor enhances the ability of the compressor to maintain air flow rate during transient step-load changes. These transient step-load changes are exhibited in many potential applications for SOFC/GT Systems. The compressor provides sustained air flow rate during the mild stall/surge event that occurs due to the transient step-load change that is applied, indicating that this type of compressor is well-suited for this hybrid application.

  • Parametric Thermodynamic Analysis of a Solid Oxide Fuel Cell Gas Turbine System Design Space
    Volume 2: Controls Diagnostics and Instrumentation; Cycle Innovations; Electric Power, 2008
    Co-Authors: Brian Tarroja, Jim Maclay, Fabian Mueller, Jacob Brouwer
    Abstract:

    A parametric study of Solid Oxide Fuel Cell – Gas Turbine (SOFC-GT) hybrid System design is conducted with the intention of determining the thermodynamically-based design space constrained by modern material and operating limits. The analysis is performed using a thermodynamic model of a generalized SOFC-GT System where the sizing of all components, except the fuel cell, is allowed to vary. Effects of parameters such as pressure ratio, fuel utilization, oxygen utilization, and current density are examined. Operational limits are discussed in terms of maximum combustor exit temperature, maximum heat exchanger effectiveness, limiting current density, maximum hydrogen utilization, and fuel cell temperature rise. It was found that the maximum hydrogen utilization and combustor exit temperature were the most significant constraints on the System design space. The design space includes the use of cathode flow recycle and air preheat via a recuperator (heat exchanger). The effect on System efficiency of exhaust Gas recirculation using an ejector versus the use of a blower is discussed, while both are compared to the base case of using a heat exchanger only. It was found that use of an ejector for exhaust Gas recirculation caused the highest efficiency loss, and the base case was found to exhibit the highest overall System efficiency. The use of a cathode recycle blower allowed the largest downsizing of the heat exchanger, although avoiding cathode recycling achieved the highest efficiency. Efficiencies in the range of 50 – 75% were found for variations in pressure ratio, fuel utilization, oxygen utilization, and current density. The best performing Systems that fell within all design constraints were those that used a heat exchanger only to preheat air, moderate pressure ratios, low oxygen utilizations and high fuel utilizations.Copyright © 2008 by ASME

  • Simulation of a 220 kW hybrid SOFC Gas Turbine System and data comparison
    ECS Proceedings Volumes, 2003
    Co-Authors: Thomas P. Smith, Jacob Brouwer, Ashok Rao, G. Scott Samuelsen
    Abstract:

    The advancement of efficient hybrid fuel cell Systems requires the evolution of analysis strategies for evaluating and developing cycle design. This paper addresses the performance of a recently developed simulation tool for the analysis of tubular SOFC power Systems as compared to observed hybrid operation data. Descriptions of the Advanced Power Systems Analyses Tools (APSAT) modeling package and of the world's first hybrid SOFC Gas Turbine System are presented. Through simulation of the Siemens Westinghouse 220 kW hybrid the analysis program is evaluated to verify the simulation capability and accuracy of the tool. Results show that the APSAT program predicts electrical power generation and efficiency (net AC/LHV) that are in line with observed performance data. In addition, the tool accurately predicts key process temperatures throughout the System. Finally, sensitivity analyses of several major System parameters were accomplished to identifying key development needs and improvement potential for hybrid SOFC Gas Turbine cycles.

A I Schastlivtsev - One of the best experts on this subject based on the ideXlab platform.

  • hydrogen air energy storage Gas Turbine System
    Thermal Engineering, 2016
    Co-Authors: A I Schastlivtsev, O V Nazarova
    Abstract:

    A hydrogen–air energy storage Gas-Turbine unit is considered that can be used in both nuclear and centralized power industries. However, it is the most promising when used for power-generating plants based on renewable energy sources (RES). The basic feature of the energy storage System in question is combination of storing the energy in compressed air and hydrogen and oxygen produced by the water electrolysis. Such a process makes the energy storage more flexible, in particular, when applied to RES-based power-generating plants whose generation of power may considerably vary during the course of a day, and also reduces the specific cost of the System by decreasing the required volume of the reservoir. This will allow construction of such Systems in any areas independent of the local topography in contrast to the compressed-air energy storage Gas-Turbine plants, which require large-sized underground reservoirs. It should be noted that, during the energy recovery, the air that arrives from the reservoir is heated by combustion of hydrogen in oxygen, which results in the Gas-Turbine exhaust Gases practically free of substances hazardous to the health and the environment. The results of analysis of a hydrogen–air energy storage Gas-Turbine System are presented. Its layout and the principle of its operation are described and the basic parameters are computed. The units of the System are analyzed and their costs are assessed; the recovery factor is estimated at more than 60%. According to the obtained results, almost all main components of the hydrogen–air energy storage Gas-Turbine System are well known at present; therefore, no considerable RD a difficulty in manufacturing it is the necessity of ensuring the combustion of hydrogen in oxygen as complete as possible and preventing formation of nitric oxides.

  • Hydrogen–air energy storage Gas-Turbine System
    Thermal Engineering, 2016
    Co-Authors: A I Schastlivtsev, O V Nazarova
    Abstract:

    A hydrogen–air energy storage Gas-Turbine unit is considered that can be used in both nuclear and centralized power industries. However, it is the most promising when used for power-generating plants based on renewable energy sources (RES). The basic feature of the energy storage System in question is combination of storing the energy in compressed air and hydrogen and oxygen produced by the water electrolysis. Such a process makes the energy storage more flexible, in particular, when applied to RES-based power-generating plants whose generation of power may considerably vary during the course of a day, and also reduces the specific cost of the System by decreasing the required volume of the reservoir. This will allow construction of such Systems in any areas independent of the local topography in contrast to the compressed-air energy storage Gas-Turbine plants, which require large-sized underground reservoirs. It should be noted that, during the energy recovery, the air that arrives from the reservoir is heated by combustion of hydrogen in oxygen, which results in the Gas-Turbine exhaust Gases practically free of substances hazardous to the health and the environment. The results of analysis of a hydrogen–air energy storage Gas-Turbine System are presented. Its layout and the principle of its operation are described and the basic parameters are computed. The units of the System are analyzed and their costs are assessed; the recovery factor is estimated at more than 60%. According to the obtained results, almost all main components of the hydrogen–air energy storage Gas-Turbine System are well known at present; therefore, no considerable R&D costs are required. A new component of the System is the H_2–O_2 combustion chamber; a difficulty in manufacturing it is the necessity of ensuring the combustion of hydrogen in oxygen as complete as possible and preventing formation of nitric oxides.

  • Hydrogen–air energy storage Gas-Turbine System
    Thermal Engineering, 2016
    Co-Authors: A I Schastlivtsev, O V Nazarova
    Abstract:

    A hydrogen–air energy storage Gas-Turbine unit is considered that can be used in both nuclear and centralized power industries. However, it is the most promising when used for power-generating plants based on renewable energy sources (RES). The basic feature of the energy storage System in question is combination of storing the energy in compressed air and hydrogen and oxygen produced by the water electrolysis. Such a process makes the energy storage more flexible, in particular, when applied to RES-based power-generating plants whose generation of power may considerably vary during the course of a day, and also reduces the specific cost of the System by decreasing the required volume of the reservoir. This will allow construction of such Systems in any areas independent of the local topography in contrast to the compressed-air energy storage Gas-Turbine plants, which require large-sized underground reservoirs. It should be noted that, during the energy recovery, the air that arrives from the reservoir is heated by combustion of hydrogen in oxygen, which results in the Gas-Turbine exhaust Gases practically free of substances hazardous to the health and the environment. The results of analysis of a hydrogen–air energy storage Gas-Turbine System are presented. Its layout and the principle of its operation are described and the basic parameters are computed. The units of the System are analyzed and their costs are assessed; the recovery factor is estimated at more than 60%. According to the obtained results, almost all main components of the hydrogen–air energy storage Gas-Turbine System are well known at present; therefore, no considerable RD a difficulty in manufacturing it is the necessity of ensuring the combustion of hydrogen in oxygen as complete as possible and preventing formation of nitric oxides.

Gang Xiao - One of the best experts on this subject based on the ideXlab platform.

  • solar hybrid steam injected Gas Turbine System with novel heat and water recovery
    Journal of Cleaner Production, 2020
    Co-Authors: Shupeng Zheng, Gang Xiao
    Abstract:

    Abstract For concentrating solar power, Brayton cycle offers a more attractive method than Rankine cycle to improve the flexibility and the efficiency of electricity production and peak-load regulation. Therefore, in this study, a solar hybrid steam-injected Gas Turbine System with novel heat and water recovery is proposed. The new System injects steam at the inlet of a Turbine and recovers waste heat and water from exhaust Gas. Thermodynamic models of the novel System are built to analyze main factors that affect the performance and characteristics. The System efficiency is improved by 17% under an optimal steam injection rate of 0.065. Water recovery rates reach up to 98%, which is associated with a high waste heat recovery rate from the exhaust Gas. Compared with a single-stage absorption refrigeration unit, the heat recovery rate and refrigeration capacity of the System with a double-stage absorption refrigeration unit are increased by 109% and 63%, respectively. Furthermore, the models are applied to analyze the annual performance and environmental sustainability of the novel System in Lhasa and Dunhuang, western China. The maximum efficiency and peak power output of the novel System are increased by 21.8% and 37.9%, respectively. The consumption of fuels and emissions of CO2 is lower than conventional Gas Turbine. These results indicate that the proposed System shows high efficiency possibility and environmental sustainability with a near-zero water consumption.

  • thermodynamic analysis of a Gas Turbine cycle combined with fuel reforming for solar thermal power generation
    Energy, 2017
    Co-Authors: Tianfeng Yang, Gang Xiao, Xin Zhou, Huanlei Liu, Umair Sultan, Jinli Chen, Zhongyang Luo, Kefa Cen
    Abstract:

    There is insufficient literature about solarized Gas Turbines that achieved high efficiency and solar share simultaneously. It is because the outlet temperature of a solar receiver is always much lower than a combustor and it is difficult to design a high-efficiency exhaust-heat recovery System except for a complicated Rankine cycle. A solar-assisted chemically recuperated Gas Turbine System is proposed and expected to achieve a good performance by combining with two-stage fuel-steam reforming. The first stage is a low-temperature reformer, recovering exhaust Gas heat, and the second stage is a high-temperature one, absorbing concentrated solar radiation. Thermodynamic analyses and comparisons are conducted. This System is expected to have a competitive thermal efficiency of 47.7%, which is 10.6 percentage points higher than that of a solarized Gas Turbine System without reformers. Meanwhile, it has a solar share of 75.0%, which is 12.8 percentage points higher than that of a solarized Gas Turbine System with a low-temperature reformer. In the viewpoint of energy level, the two-stage fuel reforming upgrades low-level thermal energy of the Turbine exhaust and solar receiver into high-level chemical energy, reducing exergy destruction. The relative upgrade of energy level is 38.2% for Turbine exhaust and 17.4% for solar thermal energy.

P.v. Aravind - One of the best experts on this subject based on the ideXlab platform.

  • Design, modelling and techno-economic analysis of a solid oxide fuel cell-Gas Turbine System with CO2 capture fueled by Gases from steel industry
    Applied Thermal Engineering, 2019
    Co-Authors: Megha Rao, A. Fernandes, P. Pronk, P.v. Aravind
    Abstract:

    Abstract The steel industry is one of the major sources of CO2 emissions that are released in the manufacture and process of steel as well as in related power production. Focused on reduction of CO2 emissions in the power production, this paper presents a novel solid oxide fuel cell-Gas Turbine combined heat and power System fed by coke oven Gas. The solid oxide fuel cell-Gas Turbine System design consists of an adequate Gas cleaning section for contaminants removal, solid oxide fuel cell as the main power producer and an anode offGas pressure swing adsorption based CO2 capture unit. This System is thermodynamically and techno-economically analyzed and compared with a reheat steam Turbine. Furthermore, the reheat steam Turbine is retrofitted with a CO2 capture unit. It is then compared to the solid oxide fuel cell-Gas Turbine System to analyse the difference in System efficiencies. The solid oxide fuel cell-Gas Turbine System yields an electrical efficiency of 64%, which is significantly higher than electrical efficiency achieved by both, a conventional reheat steam cycle (34.1%) and the retrofitted System (27.0%). Moreover, it depicts a combined heat and power efficiency of 73%. Results also reveal that the solid oxide fuel cell-Gas Turbine System can achieve a reduction of 50% in CO2 emissions for equal power production. Furthermore, techno-economic analysis lead to a payback period of 9 years, taking into account state-of-the-art taxes and variation in the cost of components over the lifetime, without taking into account the fuel cost.