Economic analysis on small-scale forest biomass gasification considering geographical resources distribution and technical characteristics
Economic analysis on small-scale forest biomass gasification considering geographical resources distribution and technical characteristics
复制标题
DOI：
10.1016/j.biombioe.2011.03.032
复制
发表时间：
2011-07
影响因子：
6
通讯作者：
K. Yagi;T. Nakata
中科院分区：
文献类型：
--
作者：
K. Yagi;T. Nakata
生物质在日本引起了极大的兴趣，内阁于2002年批准了“生物质日本战略”，以促进生物质的利用。虽然利用木材生物量作为能源用途的各种项目已经开始，但其中许多项目主要利用废木材。由于物流成本高和在一个地点产生资源的规模小，森林生物量仍未得到利用。小型气化被认为是森林生物量的一种适当技术，最近已开始运行10多个示范工厂。本研究分析了日本小型森林生物质气化热电联产系统的经济可行性。作者开发了BiRReT工具，该工具以目标技术的地理资源分布和规模优势信息为输入数据，通过寻找最优条件对目标区域生物能源系统的经济性进行分析；即工厂规模，工厂位置，工厂数量，以及更低的发电成本。通过对宫城县的案例研究，通过技术学习得出了在BAU的情况下，在资金成本和资源价格下降的情况下，使用伐木渣燃料系统具有经济可行性的结论。另一方面，由于燃料生产成本高，薄木材不会被用作发电厂的燃料。通过工具分析还发现，在规模效益与运输成本的权衡中，技术规模效益对发电成本的影响更大。
Biomass is getting the great interest in Japan, and the cabinet approved “Biomass Nippon Strategy” in 2002 to promote the utilization of biomass. Although various projects utilizing wood biomass for energy uses have started already, many of them utilize mainly waste wood. Forest biomass remains unutilized because of the high logistic cost and the small scale of resource generation at a site. Small-scale gasification is considered as a suitable technology for forest biomass, and more than 10 demonstration plants have started to be operated recently. This study analyzes the economic feasibility of the small-scale forest biomass CHP system with gasification technology in Japan.The authors have developed the BiRReT tool, which takes input data such as geographical resource distribution and scale merit information of the target technology, and analyzes the economics of bioenergy system in target region by finding the optimal conditions; namely plant size, plant location, the number of plants, and lower generation costs. A case study in Miyagi prefecture revealed the conclusion that the system with logging residue fuel has the economic feasibility if the capital cost and the resource price will decrease from the BAU case by technological learning in the future. On the other hand, thinned wood will not be utilized as a fuel for power plants due to high fuel production cost. It is also found by the tool analysis that the technology’s scale merit has stronger impact on power generation cost in the trade-off between scale merit and the transportation cost.