The Closed-Cycle Turbine: Present and Future Prospectives for Fossil and Nuclear Heat Sources

McDonald, Colin F.

doi:10.1115/78-gt-102

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…A compromise between the cycle efficiency, turbomachinery design challenges, size of plant and plant cost is required to meet the Gen-IV expectations. In reality, a slightly lower pressure ratio has been proven to be easier in terms of aerodynamic design, mechanical stresses and satisfactory level of efficiency for closed-cycle gas turbine [15,26,[28][29][30]. Fig.…”

Section: Fig 3 Specific Power Against Pressure Ratiomentioning

confidence: 99%

Performance Analyses and Evaluation of Co2 and N2 as Coolants in a Recuperated Brayton Gas Turbine Cycle for a Generation IV Nuclear Reactor Power Plant

Osigwe

Gad-Briggs

Nikolaidis

et al. 2020

Journal of Nuclear Engineering and Radiation Science

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As demands for clean and sustainable energy renew interests in nuclear power to meet future energy demands, generation IV nuclear reactors are seen as having the potential to provide the improvements required for nuclear power generation. However, for their benefits to be fully realized, it is important to explore the performance of the reactors when coupled to different configurations of closed-cycle gas turbine power conversion systems. The configurations provide variation in performance due to different working fluids over a range of operating pressures and temperatures. The objective of this paper is to undertake analyses at the design and off-design conditions in combination with a recuperated closed-cycle gas turbine and comparing the influence of carbon dioxide and nitrogen as the working fluid in the cycle. The analysis is demonstrated using an in-house tool, which was developed by the authors. The results show that the choice of working fluid controls the range of cycle operating pressures, temperatures, and overall performance of the power plant due to the thermodynamic and heat properties of the fluids. The performance results favored the nitrogen working fluid over CO2 due to the behavior CO2 below its critical conditions. The analyses intend to aid the development of cycles for generation IV nuclear power plants (NPPs) specifically gas-cooled fast reactors (GFRs) and very high-temperature reactors (VHTRs).

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Section: Fig 3 Specific Power Against Pressure Ratiomentioning

confidence: 99%

Performance Analyses and Evaluation of Co2 and N2 as Coolants in a Recuperated Brayton Gas Turbine Cycle for a Generation IV Nuclear Reactor Power Plant

Osigwe

Gad-Briggs

Nikolaidis

et al. 2020

Journal of Nuclear Engineering and Radiation Science

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“…The above issues have been somewhat belabored because a strong distinction needs to be made between open-cycle and closed-cycle gas turbines. The closed-cycle gas turbine has not yet found acceptance in the U.S., but with emphasis now being placed on the utilization of coal and coal-derived fuels, this prime mover may well emerge in the foreseeable future as a major contributor to the U.S. electric utility industry (7). The major advantages of the closed cycle gas turbine are:…”

Section: Of Gas Turbine For Electrical Powermentioning

confidence: 99%

Maintenance Considerations in the Design of the Direct-Cycle Nuclear Gas Turbine Power Plant

McDonald

Paget

1979

Volume 1B: Gas Turbines

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In the integrated gas turbine high temperature gas cooled reactor (GT-HTGR) plant, all of the helium turbine power conversion machinery operates on the reactor coolant helium and is installed inside the reactor vessel; therefore, it is important that maintenance aspects be considered during the plant conceptual design phase. The primary objective of the GT-HTGR plant maintenance and inspection plan is to provide facilities, equipment, and component designs of reasonable cost that will yield good plant availability. It is, therefore, a matter of policy to design the reactor and the power conversion system installation, as well as the related maintenance facilities, for practical operation for both planned and unplanned maintenance. All primary system equipment is designed for full plant lifetime, with no limited-life parts, and the influence of maintenance considerations on the design of the major components and the plant configuration is discussed. Turbomachinery change-out is regarded as a planned maintenance activity and the sequence of events, together with the necessary equipment items, for removal and re-installation of helium gas turbine is discussed. The maintenance and repair of components such as the heat exchangers, ducting, and valves, which are designed to last throughout the plant lifetime but could fail due to unforeseen circumstances, are also discussed.

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“…The present and future pros pectives regarding the use of commercial CCGT yste ms. are described in detail in Ref . 1.…”

Section: Introductionmentioning

confidence: 99%

Core Design Considerations for a Large Gas Turbine HTGR

Rao

Baxter

1979

Volume 1B: Gas Turbines

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Advanced high-temperature gas-cooled reactor (HTGR) design concepts for energy production using gas turbine applications depend on cores capable of generating helium coolant outlet temperatures up to 900 C (1652 F). This paper describes a preliminary analysis of a large HTGR [4000 MW (t)] core using a prismatic fuel with coolant gas core outlet temperatures of 850 C (1562 F). This study provides core design considerations in the areas of radial fuel zoning, power distribution, fuel performance, fuel temperatures, and fission product release for a large HTGR core operating under high-temperature conditions. Though the work was performed on a 4000-MW(t) core, all design considerations developed are equally applicable to a 3000-MW(t) core. Potentials for upgrading the core performance and suggested improvements for implementation in future design work are cited.

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The Closed-Cycle Turbine: Present and Future Prospectives for Fossil and Nuclear Heat Sources

Cited by 7 publications

References 16 publications

Performance Analyses and Evaluation of Co2 and N2 as Coolants in a Recuperated Brayton Gas Turbine Cycle for a Generation IV Nuclear Reactor Power Plant

Performance Analyses and Evaluation of Co2 and N2 as Coolants in a Recuperated Brayton Gas Turbine Cycle for a Generation IV Nuclear Reactor Power Plant

Maintenance Considerations in the Design of the Direct-Cycle Nuclear Gas Turbine Power Plant

Core Design Considerations for a Large Gas Turbine HTGR

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