Solid oxide fuel cell hybrid system: Control strategy for stand-alone configurations

Ferrari, Mario L.

doi:10.1016/j.jpowsour.2010.11.029

Cited by 55 publications

(90 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More specifically, several challenges must be overcome to couple the very fast response of the mGT system (low mechanical inertia of the turbine shaft) with the slow thermal variations of the SOFC stack [31] (high thermal capacitance of fuel cell materials), while the different volume values of SOFC sides generate different time-dependent performance in terms of pressurization/depressurization delays (an important aspect to take into account in order to prevent excessive cathode/anode pressure difference during transient operations [25]). Moreover, the fluid dynamic and chemical responses of the anodic side, important aspects to avoid low STCR values, are usually not in line with the transient behaviour necessary to prevent other failures [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Advanced control approach for hybrid systems based on solid oxide fuel cells

Ferrari

2015

Applied Energy

Self Cite

View full text Add to dashboard Cite

This paper shows a new advanced control approach for operations in hybrid systems equipped with solid oxide fuel cell technology. This new tool, which combines feed-forward and standard proportional–integral techniques, controls the system during load changes avoiding failures and stress conditions detrimental to component life. This approach was selected to combine simplicity and good control performance. Moreover, the new approach presented in this paper eliminates the need for mass flow rate meters and other expensive probes, as usually required for a commercial plant. Compared to previous works, better performance is achieved in controlling fuel cell temperature (maximum gradient significantly lower than 3 K/min), reducing the pressure gap between cathode and anode sides (at least a 30% decrease during transient operations), and generating a higher safe margin (at least a 10% increase) for the Steam-to-Carbon Ratio.\ud This new control system was developed and optimized using a hybrid system transient model implemented, validated and tested within previous works. The plant, comprising the coupling of a tubular solid oxide fuel cell stack with a microturbine, is equipped with a bypass valve able to connect the compressor outlet with the turbine inlet duct for rotational speed control. Following model development and tuning activities, several operative conditions were considered to show the new control system increased performance compared to previous tools (the same hybrid system model was used with the new control approach). Special attention was devoted to electrical load steps and ramps considering significant changes in ambient conditions

show abstract

Section: Introductionmentioning

confidence: 99%

Advanced control approach for hybrid systems based on solid oxide fuel cells

Ferrari

2015

Applied Energy

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although, commercial hybrid systems are not available yet, experimental studies have been conducted on portions of the system [130]. A simulated hybrid system was developed at University of Genoa [131][132][133] with a Turbec T100 MGT. Gas outlet compositions of SOFC were simulated and tested with the MGT in order to study the hybrid system performance and control.…”

Section: Fuel Cell-gas Turbine Hybrid Cyclementioning

confidence: 99%

Externally fired gas turbine technology: A review

2015

View full text Add to dashboard Cite

“…Pressure and temperature of this component are calculated considering inlet/outlet mass flow rate and enthalpy balances [19]. This tool was developed using a ''lumped-volume'' approach [19,24,25]. This means each component (plenum excluded) is based on a steady-state off-design model coupled with a constant section ideal duct for the thermal delay.…”

Section: Real-time Transient Model Descriptionmentioning

confidence: 99%

Re‐Compression Model for SOFC Hybrid Systems: Start‐up and Shutdown Test for an Emulator Rig

et al. 2014

View full text Add to dashboard Cite

This paper reports a new innovative re-compression technology for solid oxide fuel cell (SOFC) hybrid systems necessary to increase pressure at compressor outlet level (as required by fuel cell systems for managing cathodic recurculation and to increase SOFC efficiency). This work was based on a collaboration between the University of Manchester (United Kingdom) and the University of Genoa (Italy).\ud The re-compression study will be performed with the hybrid system emulator rig by TPG. This device is composed of the following technology: a microturbine package able to produce up to 100 kWe which was modified for external connections, external pipes designed for several purposes (by-pass, measurement or bleed), and a high temperature modular vessel necessary to emulate the dimension of an SOFC stack. For the purpose of re-compression, this test rig is planned to be equipped with a turbocharger capable of increasing pressure using part of recuperator outlet flow.\ud Theoretical activity was considered before carrying out the real experimental tests to avoid plant risky conditions. So, it was necessary to develop a transient model (Matlab-Simulink environment) to simulate the hybrid system emulator including the re-compression system. The results obtained with the model were carried out considering the start-up/shutdown phases of the turbocharger device

show abstract

Solid oxide fuel cell hybrid system: Control strategy for stand-alone configurations

Cited by 55 publications

References 31 publications

Advanced control approach for hybrid systems based on solid oxide fuel cells

Advanced control approach for hybrid systems based on solid oxide fuel cells

Externally fired gas turbine technology: A review

Re‐Compression Model for SOFC Hybrid Systems: Start‐up and Shutdown Test for an Emulator Rig

Contact Info

Product

Resources

About