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Research Papers

Analyses of Simple and Intercooled Recuperated Direct Brayton Helium Gas Turbine Cycles for Generation IV Reactor Power Plants

[+] Author and Article Information
A. Gad-Briggs

Gas Turbine Engineering Group, Cranfield University,
Cranfield, Bedfordshire MK43 0AL, UK
e-mail: a.a.gadbriggs@cranfield.ac.uk

P. Pilidis

Gas Turbine Engineering Group, Cranfield University,
Cranfield, Bedfordshire MK43 0ALUK
e-mail: p.pilidis@cranfield.ac.uk

Manuscript received October 2, 2015; final manuscript received April 5, 2016; published online December 20, 2016. Assoc. Editor: Yasuo Koizumi.

ASME J of Nuclear Rad Sci 3(1), 011017 (Dec 20, 2016) (8 pages) Paper No: NERS-15-1213; doi: 10.1115/1.4033398 History: Received October 02, 2015; Accepted April 07, 2016

As a nongreenhouse gas-emitting source, the benefits of nuclear as a main power-generation alternative are yet to be fully explored; part of the reason is due to the significant implementation costs. However, with cycle efficiencies of 45–50% in current studies, it can be argued that the long-term benefits outweigh the initial costs, if developed under the Generation-IV (Gen-IV) framework. The main objective of this study is to analyze the effects of pressure and temperature ratios (TRs) including sensitivity analyses of component efficiencies, ambient temperature, component losses and pressure losses on cycle efficiency and specific work. The results obtained indicate that pressure losses and recuperator effectiveness have the greatest impact on cycle efficiency and specific work. The analyses intend to aid development of the simple cycle recuperated (SCR) and intercooled cycle recuperated (ICR) cycles, applicable to gas-cooled fast reactors (GFRs) and very-high-temperature reactors (VHTRs), in which helium is the coolant.

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References

Figures

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Fig. 1

Typical simple cycle with recuperator [9]

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Fig. 2

Typical intercooled cycle with recuperator [10]

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Fig. 3

Performance simulation tool structure for SCR

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Fig. 4

PR versus efficiency for given TRs (SCR)

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Fig. 5

PR versus efficiency for given TRs (ICR)

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Fig. 6

PR versus specific work for given TRs (SCR)

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Fig. 7

PR versus specific work for given TRs (ICR)

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Fig. 8

Sensitivity analysis—effect of component efficiencies on cycle efficiency (SCR)

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Fig. 9

Sensitivity analysis—effect of component efficiencies on cycle efficiency (ICR)

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Fig. 10

Sensitivity analysis—effect of component efficiencies on specific work (SCR)

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Fig. 11

Sensitivity analysis—effect of component efficiencies on specific work (ICR)

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Fig. 12

Sensitivity analysis—effect of compressor inlet temperature on cycle efficiency

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Fig. 13

Sensitivity analysis—pressure losses

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