Abstract
A hybrid system based on a micro gas turbine (μGT) and a high-temperature fuel cell, i.e., molten carbonate fuel cell (MCFC) or solid oxide fuel cell (SOFC), is expected to achieve a much higher efficiency than conventional distributed power generation systems. In this study, a cycle analysis method and the performance evaluation of a μGT-MCFC hybrid system, of which the power output is 30 kW, are investigated to clarify its feasibility. We developed a general design strategy in which a low fuel input to a combustor and higher MCFC operating temperature result in a high power generation efficiency. A high recuperator temperature effectiveness and a moderate steam-carbon ratio are the requirements for obtaining a high material strength in a turbine. In addition, by employing a combustor for complete oxidation of MCFC effluents without additional fuel input, i.e., a catalytic combustor, the power generation efficiency of a μGT-MCFC is achieved at over 60% (LHV).
| Original language | English |
|---|---|
| Pages (from-to) | 65-74 |
| Number of pages | 10 |
| Journal | JSME International Journal, Series B: Fluids and Thermal Engineering |
| Volume | 48 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2005 Feb |
Keywords
- Cycle analysis
- Energy saving
- Exergy
- Fuel cell
- Gas turbine
- Hybrid system
- Thermal efficiency
ASJC Scopus subject areas
- Mechanical Engineering
- Physical and Theoretical Chemistry
- Fluid Flow and Transfer Processes