Cost modeling approach and economic analysis of biomass gasification integrated solid oxide fuel cell systems

The results shows that, the cost of the steam gasification system is shown to be
highest compared to the mixed air steam gasification system and air gasification
system due to the higher hydrogen production. Other than the SOFC and
gasification costs, a significant cost towards the heat exchangers is about 15 to
20% of the total equipment purchase cost. The specific plant cost for the air
gasification varied from the 16,600 US$/ kW to 19,200 US$/kWe. For the case of
biomass gasification-integrated SOFC-GT configuration, the major cost portions are
shared by the SOFC, HRSG and gasifier. The HRSG equipment shared a cost
portion of 25 to 30% for all the operating modes. The cost is decreased with a
similar trend as that of steam, mixed air-steam and air gasification systems. For the
case of biomass gasification integrated with SOFC-ST configuration, the total
equipment purchase cost decreases at a rate of 15 to 20% for both mixed air
steam and air gasification system. Plant specific cost for the steam gasification
mode varied from 15200 to 17200 US $/kW which is significantly very high