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Analysis of the truck transportation of eucalyptus logging residues to Portuguese power plants
International Journal of Forest Engineering ( IF 2.1 ) Pub Date : 2019-01-02 , DOI: 10.1080/14942119.2019.1565029
José Figueiredo da Silva 1 , António Ramos 2
Affiliation  

ABSTRACT Transportation of logging residues (LR) from eucalyptus plantations to regional bioenergy plants may incur high unit costs that restrict their removal from the forest, aggravating fire risk. This paper compares the cost of truck transportation of eucalyptus LR in Portugal, for alternative operational plans, aiming to improve biomass supply efficiency and to promote cost reduction. The following factors were analyzed: (1) the relation between truck configuration, biomass physical characteristics and payload, and (2) the relation between the transportation cost of a unit of mass and of a unit of heat and the biomass moisture content (MC). Direct transport of LR before comminution, with a 70 m3 semi-trailer, achieves 65% of the maximum payload, for the mean MC of 42%, and the cost represents46% of the payload value. Direct transport of shredded biomass with a 77 m3 semi-trailer achieves 76% of the maximum payload (mean MC of 43%) and the cost represents a fraction up to 62% of the payload value. Using a 90 m3 semi-trailer the payload increases to 80% of the maximum and the transportation cost decreases to less than 42% of the biomass value. For small scale logging operations a two echelon supply system promotes efficiency, allowing centralized shredding after additional natural drying that improves the quality of fuel, and involves a transportation cost of 10€ Mg−1 (MC of 43%) for a total distance of 33 km. Graphical Abstract

中文翻译:

桉树采伐残留物到葡萄牙电厂的卡车运输分析

摘要 将伐木残留物 (LR) 从桉树种植园运输到区域生物能源工厂可能会产生高昂的单位成本,从而限制了它们从森林中的移除,从而加剧了火灾风险。本文比较了葡萄牙桉树LR的卡车运输成本,以制定替代运营计划,旨在提高生物质供应效率并促进成本降低。分析了以下因素:(1)卡车配置、生物质物理特性和有效载荷之间的关系,以及(2)单位质量和单位热量的运输成本与生物质水分含量(MC)之间的关系. 粉碎前直接运输LR,用70立方米半挂车,达到最大有效载荷的65%,平均MC为42%,成本占有效载荷值的46%。使用 77 立方米半挂车直接运输切碎的生物质可实现最大有效载荷的 76%(平均 MC 为 43%),成本占有效载荷值的一小部分,最高可达 62%。使用 90 立方米的半挂车,有效载荷增加到最大值的 80%,运输成本降低到不到生物质价值的 42%。对于小规模伐木作业,两梯队供应系统提高了效率,允许在额外自然干燥后集中粉碎,从而提高燃料质量,并且涉及 10 欧元 Mg-1(MC 为 43%)的运输成本,总距离为 33公里。图形概要 使用 90 立方米半挂车,有效载荷增加到最大值的 80%,运输成本降低到不到生物质价值的 42%。对于小规模伐木作业,两梯队供应系统提高了效率,允许在额外自然干燥后集中粉碎,从而提高燃料质量,并且涉及 10 欧元 Mg-1(MC 为 43%)的运输成本,总距离为 33公里。图形概要 使用 90 立方米半挂车,有效载荷增加到最大值的 80%,运输成本降低到不到生物质价值的 42%。对于小规模伐木作业,两梯队供应系统提高了效率,允许在额外自然干燥后集中粉碎,从而提高燃料质量,并且涉及 10 欧元 Mg-1(MC 为 43%)的运输成本,总距离为 33公里。图形概要
更新日期:2019-01-02
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