용융탄산염연료전지(MCFC) 시스템의 전과정평가:국내 2.5MW 연료전지 시스템을 대상으로

Abstract

The environmental impacts of a 2.5 MW molten carbonate fuel cell (MCFC) system in Korea using life cycle assessment (LCA) were analyzed. Simapro version 7.0 to calculate the environmental impacts of the MCFC system, and operating data for one year (2014). LCA that the global warming potential (GWP) and abiotic depletion potential (ADP) 3.05E-01 kgCO₂SUBeq/SUB/KWhSUBe/SUB and 1.65E-03kgSbSUBeq/SUB/kWhSUBe/SUB, respectively. Operational phase was the most significant contributor to the environmental impacts showing that GWP and ADP were 3.02E-01 kgCO₂SUBeq/SUB/KWhSUBe/SUB (98.9%) and 1.63E-03kgSbSUBeq/SUB/kWhSUBe/SUB (99.1%), respectively. Natural gas reforming phase was the main reason for the environmental impacts related to the whole life of the MCFC system. MCFC stack was a dominant contributor to the environmental impacts. In detail, among MCFC stack components, MCFC cell appeared to 68% environmental impact. In addition, Nickel was a dominant contributor to the environmental impact of MCFC cell. Finally, as scenario-based results, the end of life MCFC system found that usage rate of heating, operating time period and recycling rate were significant factors the environmental impact.