Characterization of Air Flow Management and Control in a Fuel Cell Turbine Hybrid Power System Using Hardware Simulation

Tucker, David; Lawson, Larry; Gemmen, Randall

doi:10.1115/pwr2005-50127

Cited by 47 publications

(44 citation statements)

References 3 publications

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“…Closing the bleed air valve from 90% to 100% the turbine speed and mass flow increase is not completely linear and the surge margin reduction also seems nonlinear. In this experiment, a certain discrepancy from previous studies [12] between the mass flow increasing and the surge margin reduction is noticed, and summarized for dynamic conditions in Table 2.…”

Section: Table 1 Initial Actuators Position In Bleed Air Testcontrasting

confidence: 70%

“…FV-432 = 48.5% opened FV-38O= 10% opened E-105 =40kW FV-170 = 40% opened present a substantial difference with previous works performed in closed loop [12].…”

Section: Table 1 Initial Actuators Position In Bleed Air Testcontrasting

confidence: 67%

“…Even though the compressor discharge pressure is immediately decreased, the turbine inlet pressure actually increases. As shown in previous work [12], this is due to the reduction in system pressure loss.…”

Section: Ramp-down Strategy With Load No Variation In Cold Air or Blmentioning

confidence: 67%

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Avoiding Compressor Surge During Emergency Shutdown Hybrid Turbine Systems

Pezzini¹,

Tucker

Traverso³

2013

Journal of Engineering for Gas Turbines and Power

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A new emergency shutdown procedure for a direct-flred fuel cell turbine hybrid power system was evaluated using a hardware-based simulation of an integrated gasiflerlfuel celllturhine hybrid cycle (IGFC), implemented through the Hybrid Performance (Hyper) project at the National Energy Technology Laboratory, U.S. Department of Energy (NETL). The Hyper facility is designed to explore dynamic operation vf hyhrid systems and quantitatively characterize such transient hehavior. It is possihle to model, test, and evaluate the effects of different parameters on the design and operation of a gasiflerlfuel celllgas turbine hyhrid system and provide a means of quantifying risk mitigation strategies. An open-loop system analysis regarding the dynamic effect of bleed air, cold air bypass, and load hank is presented in order to evaluate the comhination of these three main actuators during emergency shutdown. In the previous Hyhrid control system architecture, catastrophic compressor failures were ohserved when the fuel and load hank were cut off during emergency shutdown strategy. Improvements were achieved using a nonlinear fuel valve ramp down when the load bank was not operating. Experiments in load hank operation show compressor surge and stall after emergency shutdown activation. The difficulties inflnding an optimal compressor and cathode mass flow for mitigation of surge and stall using these actuators are illustrated.

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Section: Table 1 Initial Actuators Position In Bleed Air Testcontrasting

confidence: 70%

“…FV-432 = 48.5% opened FV-38O= 10% opened E-105 =40kW FV-170 = 40% opened present a substantial difference with previous works performed in closed loop [12].…”

Section: Table 1 Initial Actuators Position In Bleed Air Testcontrasting

confidence: 67%

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Avoiding Compressor Surge During Emergency Shutdown Hybrid Turbine Systems

Pezzini¹,

Tucker

Traverso³

2013

Journal of Engineering for Gas Turbines and Power

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“…The test rig is a physical simulator of a fuel cell hybrid system cathode side [4] equipped with a recirculation carried out by an ejector (Fig. 1).…”

Section: Test Rig Descriptionmentioning

confidence: 99%

Early start-up of solid oxide fuel cell hybrid systems with ejector cathodic recirculation: Experimental results and model verification

Ferrari

Traverso

Pascenti

et al. 2007

Proceedings of the Institution of Mechanical Engineers, Part A:

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A new test rig, founded in part by Rolls-Royce Fuel Cell Systems Limited, by the EU integrated project 'FELICITAS', and by the national project PRIN-2005, has been designed and built at the University of Genova to study different early start-up layouts and strategies for solid oxide fuel cell (SOFC) hybrid systems, using ejector-based cathodic recirculation.The test rig, which is flexible enough to analyse different emulated turbomachine layout (single shaft, two shafts, regenerated cycles or not, and so forth), different ejector configurations, and different stack arrangements, is unique. It also allows the early start-up performance to be fully investigated with particular attention to the analysis of the hybrid system fluid dynamic behaviour when the stack is off and the control system operates at critical conditions. The experiments have been carried out using a patented start-up combustor emulator (outlet temperature higher than 950 • C), and monitoring the pressure and temperature quick rise to prevent mechanical and thermal stress to the fuel cell stack and to maintain turbomachine stability.The experimental results have also been used to verify the time-dependent hybrid system models based on TPG-TRANSEO tool. The results show good agreement with experimental data. This is essential to increase confidence with predictive time-dependent simulation tools during the start-up phase, where experimental data are hardly available and fuel cell materials may operate under risky conditions.

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“…The tools developed to explore the surrogate autonomous construction agent problem will be applied to controlling information from a hybrid fuel cell power generation facility (see Figure 20) [Tucker et al, 2005]. Although the facility has relatively few sensors (40-100), the platform will provide a pragmatic application to explore the information control schemas developed with the construction agents.…”

Section: Hybrid Fuel Cell Power Generation Facilitymentioning

confidence: 99%

Autonomous construction agents: An investigative framework for large sensor network self-management

Bruce

2008

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Characterization of Air Flow Management and Control in a Fuel Cell Turbine Hybrid Power System Using Hardware Simulation

Cited by 47 publications

References 3 publications

Avoiding Compressor Surge During Emergency Shutdown Hybrid Turbine Systems

Avoiding Compressor Surge During Emergency Shutdown Hybrid Turbine Systems

Early start-up of solid oxide fuel cell hybrid systems with ejector cathodic recirculation: Experimental results and model verification

Autonomous construction agents: An investigative framework for large sensor network self-management

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