Efficient Planar SOFC Technology for a Portable Power Generator

Poenicke, Andreas; Reuber, Sebastian; Dosch, Christian; Kusnezoff, Mihails; Wunderlich, Christian; Michaelis, A.

doi:10.1002/9781118217481.ch12

Cited by 3 publications

(5 citation statements)

References 12 publications

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“…This planar arrangement of the component parts was chosen as it offers a cost-effective manufacturing method and simplifies stack compression. The hotbox core module and the applied stack technology have been discussed in more details elsewhere (5,6).…”

Section: Eneramic ® Core Module and System Prototypesmentioning

confidence: 99%

“…However, the SOFC stacks thermomechanical behavior and the structural strength of the cells are the limiting elements for cycling capability. During stack PMA systematic diagonal cell fractures were observed that seem to be caused by the stacks cell geometry (6). That problem has been addressed in a new stack design with improved thermomechanics.…”

Section: Cycle Tests Of Stacks and Core Modulesmentioning

confidence: 99%

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Eneramic Power Generator – A Reliable and Cycleable 100W SOFC-System

et al. 2013

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Off-grid power generation is considered as an attractive market for fuel cells. For this purpose, a compact SOFC battery hybrid system was developed that operates on commercially available fuels. Due to its progressive thermal packaging, the mobile prototype achieves a net efficiency of 22 % with commercial BoP components. It was possible to reduce the cold start time of the system by direct cathode preheating with burner off-gas. Thus, the system is designed for frequent start-up and cycling capability. In consequence the planar SOFC stack was tested with rapid heating rates up to 20 K/min in furnace and hotbox environment. The degradation caused by system cycling is less than 0.1 % per cycle. Finally, the optimization of stack temperature conditions has improved the lifetime of the SOFC stack significantly.

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Section: Eneramic ® Core Module and System Prototypesmentioning

confidence: 99%

Section: Cycle Tests Of Stacks and Core Modulesmentioning

confidence: 99%

Eneramic Power Generator – A Reliable and Cycleable 100W SOFC-System

et al. 2013

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“…Recent test results have proven the maturity of developed solutions in terms of long-term stability and cyclization capability. eneramic ® stacks have been successfully operated for more than 16.000 hours and 110 start/stop-cycles with a power degradation rate below 0,6 % per 1.000 hours and 2 % per ten cycles, respectively 9,10 . The eneramic ® technology is currently commercialized by a corporate spin-off, aiming at SOFC-based products for off-grid power generation and stationary micro-CHP.…”

Section: Sofc Stack Technologymentioning

confidence: 99%

“…After initiation of the eneramic ® project in 2007, substantial research and development work was dedicated to the SOFC stack design and structural elements, functional layers, sealing glass, as well as joining technologies for hot-gas heat exchangers and reactors 9,11 . System integration was started after the core components had proven reasonable maturity during pre-tests.…”

Section: Achievements Of the Eneramic ® Sofc System Development Projectmentioning

confidence: 99%

SOFC System Development and Held Trials for Commercial Applications

Pfeifer

Reuber

Hartmann

et al. 2016

Ceramic Transactions Series

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At Fraunhofer IKTS, appropriate processes and methods for the development of customized, application-specific SOFC concepts and prototype systems have been established during various projects in the past, funded by public bodies and industrial customers. As an outcome of the cell and stack developments during the past years, two proprietary SOFC technology platforms for system integration are readily available at IKTS. The eneramic ® technology can be utilized for SOFC devices in the power range between 50 and 300 W. CFY stacks are available in standard sizes between 10 and 40 cells with a power output between 300 W and 1.2 kW. Higher power levels can be achieved by integration of multiple stacks in joint HotBox modules. For the development of SOFC systems, a detailed plant specification and process design is prepared initially. Here, all application-specific requirements are considered and a system concept with special consideration of the proposed operating modes and fuel processing technology is derived. The proposed concept is validated afterwards by means of laboratory tests on component, HotBox and system level. Further design iterations and model-based analyses are used for the creation of optimized solutions to be implemented in prototype and demonstration systems. Two exemplary SOFC development projects are described in order to illustrate the development status and system engineering approach. INTRODUCTIONIn addition to their use in residential buildings and micro CHP applications, SOFC systems are especially suited for various industrial tasks and off-grid power supplies. In this context, the usability of different conventional fuels in SOFC systems, such as Natural Gas, LPG, biogas, ethanol, diesel and kerosene, provides crucial technological advantages for the development of application-specific and marketable power generators 1 -4 .At Fraunhofer IKTS, appropriate processes and methods for the development of customized, application-specific SOFC concepts and prototype systems have been established during various projects in the past, funded by public bodies and industrial customers. During the implementation of these projects, professionals from different working groups of IKTS are working together in interdisciplinary project teams.For the development of SOFC systems, a detailed plant specification and process design is prepared initially. Here, all application-specific requirements are considered and a system concept with special consideration of the proposed operating modes and fuel processing technology is derived. The proposed concept is validated afterwards by means of laboratory tests on component, HotBox and system level. Further design iterations and model-based analyses are used for the creation of optimized solutions to be implemented in prototype and demonstration systems. During the complete system engineering process the project partners, customers or users are directly involved. The transfer of knowledge and technology for a subsequent product development and commercialization might be...

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“…The system concept is presented in detail elsewhere (1,2), here it is briefly described. In general the challenge of this nano power range was to develop a highly integrated gas processing unit (GPU) to minimize thermal losses of this small system.…”

Section: Sofc Technology and System Concept Behind Eneramic ®mentioning

confidence: 99%

Application-Oriented Design and Field Trial of the Eneramic® Power Generator

Reuber¹,

Jürgens²,

Pfeifer³

et al. 2015

ECS Trans.

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Off-grid power generation is considered as an attractive market for fuel cells. For this reason, a compact SOFC battery hybrid system is being developed and commercialized by Fraunhofer IKTS. The 100 W hybrid system operates on commercially available LPG fuels. Different prototypes are being tested in the lab and under real-life applications while a first product version is available for industrial customers. For off-grid applications frequent start-stop cycles are expected, which are challenging for the SOFC technology. Following these requirements IKTS has consistently improved the robustness of the SOFC up to an interim goal of now 110 start-stop cycles by quality measures, design and the operating procedure. The reliability of the core technology highlights the long-term performance at power degradation of < 0.6 % per 1,000 h over 16,000 h in Hotbox test. The results of the automated laboratory and field tests will be discussed in this paper.

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Efficient Planar SOFC Technology for a Portable Power Generator

Cited by 3 publications

References 12 publications

Eneramic Power Generator – A Reliable and Cycleable 100W SOFC-System

Eneramic Power Generator – A Reliable and Cycleable 100W SOFC-System

SOFC System Development and Held Trials for Commercial Applications

Application-Oriented Design and Field Trial of the Eneramic® Power Generator

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