Performance Simulation to Understand the Effects of Multifluid Scaling of Gas Turbine Components for Generation IV Nuclear Power Plants

Osigwe, Emmanuel O.; Gad-Briggs, Arnold; Nikolaidis, Theoklis; Pilidis, Pericles; Sampath, Suresh

doi:10.1115/1.4044406

Cited by 4 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The conditions for hydrogen production were modelled and simulated using an inhouse tool proprietary to EGB Engineering, which has been used in numerous studies [14][15][16][17][18][19]. The tool calculates each station parameter based on inlet conditions and the reactor core-outlet temperature (COT) in order to determine the NPP power output and cycle efficiency.…”

Section: Materials and Methods-modelling And Simulation Of Nuclear Po...mentioning

confidence: 99%

Analysis of Control-System Strategy and Design of a Small Modular Reactor with Different Working Fluids for Electricity and Hydrogen Production as Part of a Decentralised Mini Grid

Gad-Briggs¹,

Osigwe²,

Jafari

et al. 2022

Energies

Self Cite

View full text Add to dashboard Cite

Hydrogen is increasingly being viewed as a significant fuel for future industrial processes as it offers pathways to zero emission. The UK sees hydrogen as one of a handful of low-carbon solutions for transition to net zero. Currently, most hydrogen production is from steam reforming of natural gas or coal gasification, both of which involve the release of carbon dioxide. Hydrogen production from mini decentralised grids via a thermochemical process, coupled with electricity production, could offer favourable economics for small modular reactors (SMRs), whereby demand or grid management as a solution would include redirecting the power for hydrogen production when electricity demand is low. It also offers a clean-energy alternative to the aforementioned means. SMRs could offer favourable economics due to their flexible power system as part of the dual-output function. This study objective is to investigate the critical performance parameters associated with the nuclear power plant (NPP), the cycle working fluids, and control-system design for switching between electricity and hydrogen demand to support delivery as part of a mini grid system for a reactor power delivering up to approximately 600 MWth power. The novelty of the work is in the holistic parametric analysis undertaken using a novel in-house tool, which analyses the NPP using different working fluids, with a control function bolt-on at the offtake for hydrogen production. The results indicate that the flow conditions at the offtake can be maintained. The choice of working fluids affects the pressure component. However, the recuperator and heat-exchanger effectiveness are considered as efficiency-limiting factors for hydrogen production and electricity generation. As such, the benefit of high-technology heat exchangers cannot be underestimated. This is also true when deciding on the thermochemical process to bolt onto the plant. The temperature of the gas at the end of the pipeline should also be considered to ensure that the minimum temperature-requirement status for hydrogen production is met.

show abstract

Section: Materials and Methods-modelling And Simulation Of Nuclear Po...mentioning

confidence: 99%

Analysis of Control-System Strategy and Design of a Small Modular Reactor with Different Working Fluids for Electricity and Hydrogen Production as Part of a Decentralised Mini Grid

Gad-Briggs¹,

Osigwe²,

Jafari

et al. 2022

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…The turbofan engine is a three-shaft configuration variant of a typical Rolls-Royce engine in terms of shaft configuration [40] In general, the use of liquefied hydrogen as one of the promising fuel options for aero engines is promising and feasible. The foremost consideration in the successful development and deployment of this technology is performance simulation and assessment [24]. Performance assessment is necessary to minimize the risks and costs associated with the test to analyze and evaluate the feasibility of LH 2 at the various technology readiness levels (TRL).…”

Section: System Descriptionmentioning

confidence: 99%

“…The off-design cycle performance is computed with the non-dimensional representation of the component maps, which is discussed in detail by Osigwe et al [24,39]. Tables 2 and 3 provide the turbofan engine performance at the component/station level as used for the exergy assessment.…”

Section: Cycle Performance Calculationsmentioning

confidence: 99%

Thermodynamic Performance and Creep Life Assessment Comparing Hydrogen- and Jet-Fueled Turbofan Aero Engine

et al. 2021

Self Cite

View full text Add to dashboard Cite

There is renewed interest in hydrogen as an alternative fuel for aero engines, due to their perceived environmental and performance benefits compared to jet fuel. This paper presents a cycle, thermal performance, energy and creep life assessment of hydrogen compared with jet fuel, using a turbofan aero engine. The turbofan cycle performance was simulated using a code developed by the authors that allows hydrogen and jet fuel to be selected as fuel input. The exergy assessment uses both conservations of energy and mass and the second law of thermodynamics to understand the impact of the fuels on the exergy destruction, exergy efficiency, waste factor ratio, environmental effect factor and sustainability index for a turbofan aero engine. Finally, the study looks at a top-level creep life assessment on the high-pressure turbine hot section influenced by the fuel heating values. This study shows performance (64% reduced fuel flow rate, better SFC) and more extended blade life (15% increase) benefits using liquefied hydrogen fuel, which corresponds with other literary work on the benefits of LH2 over jet fuel. This paper also highlights some drawbacks of hydrogen fuel based on previous research work, and gives recommendations for future work, aimed at maturing the hydrogen fuel concept in aviation.

show abstract

“…A new compressor performance curve for compressor station 2 was obtained from the scaling of an existing original equipment manufacturer (OEM) curve. There is a need for correction of both the mass flow rate and rotational speed [ 10 , 27 ]. Albusaidi [ 28 ] suggested that the corrected speed is obtained by maintaining a fixed tip Mach number and considering the variation in gasses properties.…”

Section: Theory Of Modelmentioning

confidence: 99%

“…New compressor maps were obtained by scaling the corrected values using the factors defined below [ 10 , 27 ].

…”

Section: Theory Of Modelmentioning

confidence: 99%

A model for booster station matching of gas turbine and gas compressor power under different ambient conditions

Tukur

Osigwe

2021

Heliyon

Self Cite

View full text Add to dashboard Cite

Transporting natural gas across different locations require compressor stations to provide the pressure needed to keep the gas moving. This paper presents a model for matching the gas turbine and gas compressor power required under different environmental conditions to support the continuous gas transmission across other locations. The trans-Saharan gas pipeline (TSGP) project proposed to transport gas from Nigeria to Algeria has been used as a case study in this paper. The TSGP project is a Nigerian Government initiative to rejig its gas development and transportation infrastructure to meet its internal and external market demand. The numerical method used in this paper integrates the effect of the ambient temperature in the power matching of the gas turbine and gas compressors. There are 18 compressor stations across the TSGP network, and compressor station 2 is used as the reference point. The daily temperature fluctuation is segmented into hours of the day, emphasising considerable ambient temperature variation at 3:00 h, 9:00 h, 15:00 h. One benefit of the model against others in the open literature is accounting for changes in the ambient temperature along the pipeline network and gas compression stations. Accounting for changes in ambient temperature provides accuracy to near real-life operational experience for gas distribution via pipelines. The model also accounts for variations in turbine entry temperature (TET) to compensate for changes in the ambient conditions to meet the power requirements of the gas turbine and the gas compressor. The results show that for every 1% increase in ambient temperature, a 3.5% increase in power is required to drive the gas compressor and a 1% decrease in gas turbine output power. The effect of the 1% increase in ambient would require a 3.5% increase in TET to meet both the gas turbine and gas compressor requirement.

show abstract

Performance Simulation to Understand the Effects of Multifluid Scaling of Gas Turbine Components for Generation IV Nuclear Power Plants

Cited by 4 publications

References 15 publications

Analysis of Control-System Strategy and Design of a Small Modular Reactor with Different Working Fluids for Electricity and Hydrogen Production as Part of a Decentralised Mini Grid

Analysis of Control-System Strategy and Design of a Small Modular Reactor with Different Working Fluids for Electricity and Hydrogen Production as Part of a Decentralised Mini Grid

Thermodynamic Performance and Creep Life Assessment Comparing Hydrogen- and Jet-Fueled Turbofan Aero Engine

A model for booster station matching of gas turbine and gas compressor power under different ambient conditions

Contact Info

Product

Resources

About