Abstract

05/02256 Analysis and optimization of a solid oxide fuel cell and intercooled gas turbine (SOFC-ICGT) hybrid cycle

Highlights

  • The Vision 21 program of the US Department of Energy proposes a new approach to produce energy that addresses pollution control as an integral part of high-efficiency energy production in a “Vision 21 Energy Plant”

  • The fuel-to-electricity conversion efficiency goal of a Vision 21 energy plant is greater than 60% (higher heating value (HHV) basis) using coal as fuel source and greater than 75% (lower heating value (LHV) basis) using natural gas

  • Previous research work conducted at the National Fuel Cell Research Center of the University of California, Irvine (NFCRC/UCI), which was limited to hybrid systems of less than MW output, showed that the efficiency goal of the Vision program was achievable with small hybrids

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Summary

Introduction

Previous research work conducted at the National Fuel Cell Research Center of the University of California, Irvine (NFCRC/UCI), which was limited to hybrid systems of less than MW output, showed that the efficiency goal of the Vision program was achievable with small hybrids. This was found to be the case despite having turbomachinery components with limited efficiencies (due to the smaller size). As a milestone in the third step, the current SOFC–ICGT hybrid cycle is presented and optimized as the first Vision 21 power plant capable of meeting Vision 21 goals

SOFC–ICGT system description
Modeling
21 Recycler1
Basic parameter settings
Simulation building
Parametric analysis
Moisture content of the gas out of humidifier
Excess air
Overall compression ratio
Intercooler location
System optimization
Design list
Parameter interaction analysis
Optimization
Findings
Discussion and conclusions

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