유채유를 이용한 바이오디젤의 Emergy 분석

Abstract

Korea needs to develop alternative energy to reduce the high oversea reliance on resource and to reduce the pollution from burning fossil fuel. Due to many efforts, we have bought and used biodiesel since July, 2006 and it is now most commonly used alternative energy which can reduce oversea reliance and also can improve the environment and keep the landscape. But on the other hand, high production cost, side effects on car and instability of raw material supply bring criticism on practicality. This study provides base data for energy policy by evaluating alternative effect, efficiency and sustainability base on the emergy analysis of biodiesel using rape oil. Transfromity of biodiesel is 7.55E+14sej/bbl which has low efficiency against 4.03E+14 sej/bbl of diesel. Emergy Yield Ratio(EYR), which indicates value of resource, of biodiesel is 1.50 with is lower than 6 of fuel EYR but since it is over 1 it can help reducing fossil fuel use. With high reliance on non-renewable source and purchased input, Environmental Loading Ratio of biodiesel is 2.01 and Emergy Sustainbility Index(ESI) of biodisel is 0.75. Monetary economic value of biodiesel is 112,382won/bbl even combining value of by-effect(216,337 won/bbl) there for biodiesel costs more than its benefit which is lower than ecological economic cost of biodiesel(342,000 Won/bbl).