Fuzzy-based failure mode and effect analysis (FMEA) of a hybrid molten carbonate fuel cell (MCFC) and gas turbine system for marine propulsion

2017 ◽  
Vol 364 ◽  
pp. 226-233 ◽  
Author(s):  
Junkeon Ahn ◽  
Yeelyong Noh ◽  
Sung Ho Park ◽  
Byung Il Choi ◽  
Daejun Chang
Keyword(s):  
Fuel Cell ◽  
Gas Turbine ◽  
Failure Mode ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Effect Analysis ◽  
Marine Propulsion ◽  
Carbonate Fuel Cell

Molten Carbonate Fuel Cell Gas Turbine Combined Cycle for Marine Propulsion: Part B — Part Load Operation

2002 ◽  
Author(s):  
Maria-Teresa Basurto ◽  
Pericles Pilidis ◽  
Richard Hales
Keyword(s):  
Fuel Cell ◽  
Power Systems ◽  
Gas Turbine ◽  
Combined Cycle ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Hybrid Power Systems ◽  
Hybrid Power ◽  
Marine Propulsion ◽  
Carbonate Fuel Cell

Molten Carbonate Fuel Cell/Gas Turbine (MCFC/GT) hybrid power systems represent a modern, efficient and clean alternative to the currently used marine propulsion systems. The objective of this paper is to present the results found from the application of MCFC/GT hybrid power systems to marine propulsion, and in particular to present the results of the off-design performance of a COGAFC system (Combined Gas Turbine and Fuel Cell System). The results presented are subjected to the current uncertainties on MCFC power systems derived from its early stage of development. It is, then, the interest of the authors to summarise the results of the research work done, providing to the lectors the understanding and a general view of which are the concerns, the benefits, and which should be the next steps on the implementation of these systems. The study is summarised into two papers: “Molten Carbonate Fuel Cell Gas Turbine Combined Cycle for Marine Propulsion. Part A: Design Point Operation” (Basurto et al., 2002), that describes the selection of the design point, and “Molten Carbonate Fuel Cell Gas Turbine Combined Cycle for Marine Propulsion. Part B: Part Load Operation”, that describes the off-design performance of the system. The study is based on previous work published by the authors on the integration of MCFCs with gas turbines (Basurto et al., 2001).

Molten Carbonate Fuel Cell Gas Turbine Combined Cycle for Marine Propulsion: Part A — Design Point Operation

2002 ◽  
Author(s):  
Maria-Teresa Basurto ◽  
Pericles Pilidis ◽  
Richard Hales
Keyword(s):  
Fuel Cell ◽  
Power Systems ◽  
Gas Turbine ◽  
Combined Cycle ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Hybrid Power Systems ◽  
Design Point ◽  
Marine Propulsion ◽  
Carbonate Fuel Cell

Molten Carbonate Fuel Cell/Gas Turbine (MCFC/GT) hybrid power systems could represent a modern, efficient and clean alternative to the currently used marine propulsion systems. The objective of this paper is to present the results of the study of a MCFC/GT hybrid power systems used on marine propulsion. The results are quite promising, but they are subjected to the current uncertainties derived from MCFCs early stage of development. Therefore, the interest of the authors is to summarise the research work done and the results, providing the understanding and a general view of the main concerns, benefits, identifying the next steps on the development of these systems. The study is summarised into two papers: “Molten Carbonate Fuel Cell Gas Turbine Combined Cycle for Marine Propulsion. Part A: Design Point Operation”, that describes the selection of the design point, and “Molten Carbonate Fuel Cell Gas Turbine Combined Cycle for Marine Propulsion. Part B: Part Load Operation” (Basurto et al., 2002), that describes the off-design performance of the system, and it compares the system against conventional diesel and gas turbine systems. The study is based on previous work published by the authors on the integration of MCFCs and gas turbines (Basurto et al., 2001).

Performance Evaluation of a Molten Carbonate Fuel Cell/Micro Gas Turbine Hybrid System With Oxy-Combustion Carbon Capture

2017 ◽  
Author(s):  
Ji Ho Ahn ◽  
Tong Seop Kim
Keyword(s):  
Carbon Dioxide ◽  
Fuel Cell ◽  
Gas Turbine ◽  
Hybrid System ◽  
Carbon Capture ◽  
Molten Carbonate Fuel Cell ◽  
Design Parameters ◽  
Molten Carbonate ◽  
Micro Gas Turbine ◽  
Carbonate Fuel Cell

Owing to the increasing consumption of fossil fuels and emission of greenhouse gases, interests in highly efficient and low carbon emitting power systems are growing fast. Several research groups have been suggesting advanced systems based on fuel cells and have also been applying carbon capture and storage technology to satisfy the demand for clean energy. In this study, the performance of a hybrid system, which is a combination of a molten carbonate fuel cell (MCFC) with oxy-combustion carbon capture and an indirectly fired micro gas turbine (MGT) was predicted. A 2.5MW MCFC system that is used in commercial applications was used as the reference system so that the results of the study could be applicable to practical situations. The ambient pressure type hybrid system was modeled by referring to the design parameters of an MGT that is currently being developed. A semi-closed type design characterized by flow recirculation was adopted for this hybrid system. A part of the recirculating gas is converted into liquefied carbon dioxide and captured for storage at the carbon separation unit. Almost 100% carbon dioxide capture is possible with this system. In these systems, the output power of the fuel cell is larger than in the normal hybrid system without carbon capture because the partial pressure of carbon dioxide increases. The increased cell power partially compensates for the power loss due to the carbon capture and MGT power reduction. The dependence of net system efficiency of the oxy-hybrid on compressor pressure ratio is marginal, especially beyond an optimal value.

Performance Evaluation of a Molten Carbonate Fuel Cell/Micro Gas Turbine Hybrid System With Oxy-Combustion Carbon Capture

2017 ◽  
Vol 140 (4) ◽  
Author(s):  
Ji Ho Ahn ◽  
Tong Seop Kim
Keyword(s):  
Carbon Dioxide ◽  
Fuel Cell ◽  
Gas Turbine ◽  
Hybrid System ◽  
Carbon Capture ◽  
Molten Carbonate Fuel Cell ◽  
Design Parameters ◽  
Molten Carbonate ◽  
Micro Gas Turbine ◽  
Carbonate Fuel Cell

Owing to the increasing consumption of fossil fuels and emission of greenhouse gases, interests in highly efficient and low carbon emitting power systems are growing fast. Several research groups have been suggesting advanced systems based on fuel cells and have also been applying carbon capture and storage technology to satisfy the demand for clean energy. In this study, the performance of a hybrid system, which is a combination of a molten carbonate fuel cell (MCFC) with oxy-combustion carbon capture and an indirectly fired micro gas turbine (MGT), was predicted. A 2.5 MW MCFC system that is used in commercial applications was used as the reference system so that the results of the study could be applied to practical situations. The ambient pressure type hybrid system was modeled by referring to the design parameters of an MGT that is currently being developed. A semi-closed type design characterized by flow recirculation was adopted for this hybrid system. A part of the recirculating gas is converted into liquefied carbon dioxide and captured for storage at the carbon separation unit (CSU). Almost 100% carbon dioxide capture is possible with this system. In these systems, the output power of the fuel cell is larger than in the normal hybrid system without carbon capture because the partial pressure of carbon dioxide increases. The increased cell power partially compensates for the power loss due to the carbon capture and MGT power reduction. The dependence of net system efficiency of the oxy-hybrid on compressor pressure ratio is marginal, especially beyond an optimal value.

Performance Enhancement of a Molten Carbonate Fuel Cell/Micro Gas Turbine Hybrid System With Carbon Capture by Off-Gas Recirculation

2018 ◽  
Author(s):  
Ji Ho Ahn ◽  
Ji Hun Jeong ◽  
Tong Seop Kim
Keyword(s):  
Fuel Cell ◽  
Gas Turbine ◽  
Hybrid System ◽  
Carbon Capture ◽  
Molten Carbonate Fuel Cell ◽  
Human Society ◽  
Molten Carbonate ◽  
Micro Gas Turbine ◽  
Gas Recirculation ◽  
Carbonate Fuel Cell

The demand for clean energy continues to increase as the human society becomes more aware of environmental challenges such as global warming. Various power systems based on high-temperature fuel cells have been proposed, especially hybrid systems combining a fuel cell with a gas turbine, and research on carbon capture and storage technology to prevent the emission of greenhouse gases is already underway. This study suggests a new method to innovatively enhance the efficiency of a molten carbonate fuel cell/micro gas turbine hybrid system including carbon capture. The key technology adopted to improve the net cycle efficiency is off-gas recirculation. The hybrid system incorporating oxy-combustion capture was devised, and its performance was compared with that of a post-combustion system based on a hybrid system. A molten carbonate fuel cell system based on a commercial unit was modeled. Externally supplied water for reforming was not needed as a result of the presence of the water vapor in the recirculated anode off-gas. The analyses confirmed that the thermal efficiencies of all the systems (MCFC stand-alone, hybrid, hybrid with oxy-combustion capture, hybrid with post-combustion capture) were significantly improved by introducing the off-gas recirculation. In particular, the largest efficiency improvement was observed for the oxy-combustion hybrid system. Its efficiency is over 57% and is even higher than that of the post-combustion hybrid system.

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