This article investigates the techno-economic performance of large integrated biogas Solid Oxide Fuel Cell (SOFC) power plants. Both atmospheric and pressurized operation is analysed with CO 2 vented or captured. The SOFC module produces a constant electrical power of 1 MWe. Sensitivity analysis and multi-objective optimization are the mathematical tools used to investigate the effects of Fuel Utilization ( FU ), SOFC operating temperature and pressure on the plant energy and economic performances. FU is the design variable that most affects the plant performance. Pressurized SOFC with hybridization with a gas turbine provides a notable boost in electrical ef fi ciency. For most of the proposed plant con fi gurations, the electrical ef fi ciency ranges in the interval 50 e 62% (LHV biogas) when a trade-off of between energy and economic performances is applied based on Pareto charts obtained from multi-objective plant optimization. The hybrid SOFC is potentially able to reach an ef fi - ciency above 70% when FU is 90%. Carbon capture entails a penalty of more 10 percentage points in pressurized con fi gurations mainly due to the extra energy burdens of captured CO 2 pressurization and oxygen production and for the separate and different handling of the anode and cathode exhausts and power recovery from them.
|Titolo:||Large size biogas-fed Solid Oxide Fuel Cell power plants with carbon dioxide management: Technical and economic optimization|
|Data di pubblicazione:||2015|
|Digital Object Identifier (DOI):||10.1016/j.jpowsour.2015.06.091|
|Appare nelle tipologie:||1.1 Articolo in rivista|