### Abstract

Novel proposals for the modeling and operation of a micro-CHP (combined-heat-andpower) residential system based on HT-PEMFC (High Temperature-Proton Exchange Membrane Fuel Cell) technology are described and analyzed to investigate the technical feasibility of such systems. The proposed systems must provide electricity, hot water, and space heating for an average single-family household in Denmark. A complete fuel processing subsystem, with all necessary BOP (balance-of-plant) components, is modeled and coupled to the fuel cell stack subsystem. The research project is divided into five main study topics: (a) Modeling, simulation and validation of the system in LabVIEW environment to provide the ability of Data Acquisition of actual components, and thereby more realistic design in the future; (b) Modeling, parametric study, and sensitivity analysis of the system in EES (Engineering Equation Solver). The parametric study is conducted to determine the most viable system/component design based on maximizing total system efficiency; (c) An improved operational strategy is formulated and applied in an attempt to minimize operational implications, experienced when using conventional operational strategies; (d) Application of a GA (Genetic Algorithm) optimization strategy. The objective function of the single-objective optimization strategy is the net electrical efficiency of the micro-CHP system. The implemented optimization procedure attempts to maximize the objective function by variation of nine decision variables; (e) The micro-CHP system is optimized by formulating and applying a process integration methodology. The methodology involves system optimization targeting in net electrical efficiency maximization. Subsequently a MINLP (Mixed Integer Non-Linear Programming) problem optimization strategy is applied to minimize the annual cost of the HEN (Heat Exchanger Network). The results obtained throughout this research work indicate the high potential of the proposed micro-CHP system, since net electrical efficiencies of up to 44% were reached, which are far and away higher than heat engine-based systems. Another interesting aspect is the simplicity of the system's fuel processing subsystem, which makes it more competitive, in terms of commercialization prospects, than other fuel cell-based micro-CHP systems.

Original language | English |
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Publisher | Department of Energy Technology, Aalborg University |
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Number of pages | 74 |

ISBN (Print) | 978-87-92846-03-7 |

Publication status | Published - 18 Jan 2012 |

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### Keywords

- HT-PEMFC system
- LabVIEW
- GAMS
- EES
- Fuel processing
- fuel cell

### Cite this

*Development of Next Generation micro-CHP System: Based on High Temperature Proton Exchange Membrane Fuel Cell Technology*. Department of Energy Technology, Aalborg University.

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*Development of Next Generation micro-CHP System: Based on High Temperature Proton Exchange Membrane Fuel Cell Technology*. Department of Energy Technology, Aalborg University.

**Development of Next Generation micro-CHP System : Based on High Temperature Proton Exchange Membrane Fuel Cell Technology.** / Arsalis, Alexandros.

Research output: Book/Report › Ph.D. thesis › Research

TY - BOOK

T1 - Development of Next Generation micro-CHP System

T2 - Based on High Temperature Proton Exchange Membrane Fuel Cell Technology

AU - Arsalis, Alexandros

PY - 2012/1/18

Y1 - 2012/1/18

N2 - Novel proposals for the modeling and operation of a micro-CHP (combined-heat-andpower) residential system based on HT-PEMFC (High Temperature-Proton Exchange Membrane Fuel Cell) technology are described and analyzed to investigate the technical feasibility of such systems. The proposed systems must provide electricity, hot water, and space heating for an average single-family household in Denmark. A complete fuel processing subsystem, with all necessary BOP (balance-of-plant) components, is modeled and coupled to the fuel cell stack subsystem. The research project is divided into five main study topics: (a) Modeling, simulation and validation of the system in LabVIEW environment to provide the ability of Data Acquisition of actual components, and thereby more realistic design in the future; (b) Modeling, parametric study, and sensitivity analysis of the system in EES (Engineering Equation Solver). The parametric study is conducted to determine the most viable system/component design based on maximizing total system efficiency; (c) An improved operational strategy is formulated and applied in an attempt to minimize operational implications, experienced when using conventional operational strategies; (d) Application of a GA (Genetic Algorithm) optimization strategy. The objective function of the single-objective optimization strategy is the net electrical efficiency of the micro-CHP system. The implemented optimization procedure attempts to maximize the objective function by variation of nine decision variables; (e) The micro-CHP system is optimized by formulating and applying a process integration methodology. The methodology involves system optimization targeting in net electrical efficiency maximization. Subsequently a MINLP (Mixed Integer Non-Linear Programming) problem optimization strategy is applied to minimize the annual cost of the HEN (Heat Exchanger Network). The results obtained throughout this research work indicate the high potential of the proposed micro-CHP system, since net electrical efficiencies of up to 44% were reached, which are far and away higher than heat engine-based systems. Another interesting aspect is the simplicity of the system's fuel processing subsystem, which makes it more competitive, in terms of commercialization prospects, than other fuel cell-based micro-CHP systems.

AB - Novel proposals for the modeling and operation of a micro-CHP (combined-heat-andpower) residential system based on HT-PEMFC (High Temperature-Proton Exchange Membrane Fuel Cell) technology are described and analyzed to investigate the technical feasibility of such systems. The proposed systems must provide electricity, hot water, and space heating for an average single-family household in Denmark. A complete fuel processing subsystem, with all necessary BOP (balance-of-plant) components, is modeled and coupled to the fuel cell stack subsystem. The research project is divided into five main study topics: (a) Modeling, simulation and validation of the system in LabVIEW environment to provide the ability of Data Acquisition of actual components, and thereby more realistic design in the future; (b) Modeling, parametric study, and sensitivity analysis of the system in EES (Engineering Equation Solver). The parametric study is conducted to determine the most viable system/component design based on maximizing total system efficiency; (c) An improved operational strategy is formulated and applied in an attempt to minimize operational implications, experienced when using conventional operational strategies; (d) Application of a GA (Genetic Algorithm) optimization strategy. The objective function of the single-objective optimization strategy is the net electrical efficiency of the micro-CHP system. The implemented optimization procedure attempts to maximize the objective function by variation of nine decision variables; (e) The micro-CHP system is optimized by formulating and applying a process integration methodology. The methodology involves system optimization targeting in net electrical efficiency maximization. Subsequently a MINLP (Mixed Integer Non-Linear Programming) problem optimization strategy is applied to minimize the annual cost of the HEN (Heat Exchanger Network). The results obtained throughout this research work indicate the high potential of the proposed micro-CHP system, since net electrical efficiencies of up to 44% were reached, which are far and away higher than heat engine-based systems. Another interesting aspect is the simplicity of the system's fuel processing subsystem, which makes it more competitive, in terms of commercialization prospects, than other fuel cell-based micro-CHP systems.

KW - HT-PEMFC system

KW - LabVIEW

KW - GAMS

KW - EES

KW - Fuel processing

KW - fuel cell

M3 - Ph.D. thesis

SN - 978-87-92846-03-7

BT - Development of Next Generation micro-CHP System

PB - Department of Energy Technology, Aalborg University

ER -