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Assessing the cost and operational feasibility of 'green' hardwood winter inventory for southeastern pulp mills.

机译:评估东南制浆厂“绿色”硬木冬季库存的成本和运营可行性。

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摘要

Procuring hardwood pulpwood during the winter months for a pulp mill in the Southeast can be difficult. Saturated soils and low soil strength make logging difficult or impossible on many sites, forcing companies to store large volumes of hardwood pulpwood in woodyards for retrieval during wet weather. Hardwood fiber readily available in large volumes on ground that is operable during wet periods at a location near the pulp mill could provide a valuable alternative wood source. Thus, the objectives of this study are to (1) develop a decision model for a manager to use to determine the feasibility of strategically located, intensively-managed, short-rotation hardwood fiber farms as pulp mill furnish, (2) use the model to estimate wood costs for a hypothetical eastern cottonwood plantation, and (3) use the model to determine if a fiber farm grown on drier, upland sites (“green” inventory) could be used to reduce woodyard winter inventories and economically supply a nearby pulp mill during a wood shortage, thus reducing high cost, emergency “spot market” wood purchases. The decision model is incorporated in a spreadsheet and includes all the costs typical for a fiber farm. The model is tested using current establishment and management costs from the literature and yields from an experimental fiber farm in the southeast. Under current yields, delivered costs from the fiber farm averages {dollar}71/ton. With potential increased yields that could occur with genetic improvements and operational optimizations, delivered cost for fiber farm wood could be reduced to {dollar}56/ton. In comparison, the highest cost wood purchased by the three cooperating pulp mills during the study period was {dollar}50.23/ton. The net present values of a fiber farm as “green” inventory were determined using actual wood cost and inventory levels from three cooperating southeastern pulp mills. For the “green” inventory analysis, all three pulp mills would have lowered their overall wood cost using a fiber farm (with higher yield) as “green” inventory, primarily by reducing the amount of wood required as dry inventory on woodyards. Savings accrued during “dry” years offset the higher cost of hardwood plantation deliveries. A sensitivity analysis was performed to determine the optimal size fiber farm for one of the cooperating pulp mills and indicated that 800 acres would be the most beneficial.
机译:在冬季,东南部的纸浆厂很难采购硬木纸浆。饱和的土壤和较低的土壤强度使许多地点的伐木变得困难或不可能,这迫使公司将大量的硬木纸浆木材存储在木材场中,以便在潮湿天气下进行取回。可以在湿地期间在纸浆厂附近的某个位置大量使用的硬木纤维可以在地面上大量使用,这可以提供有价值的替代木材来源。因此,本研究的目标是(1)为经理制定决策模型,用于确定战略定位,集约化管理,短旋转硬木纤维农场作为制浆厂配料的可行性,(2)使用该模型估算一个假设的东部三角叶杨人工林的木材成本,并且(3)使用该模型确定是否可以在较干燥的高地站点(“绿色”库存)上种植纤维农场,以减少木材场冬季库存并经济地供应附近的纸浆工厂在木材短缺期间,从而降低了高成本,紧急的“现货市场”木材采购量。决策模型包含在电子表格中,并包括光纤场的所有典型成本。使用文献中的当前建立和管理成本以及东南部一个实验性纤维场的产量对模型进行了测试。以目前的单产计算,纤维场的平均交付成本为71美元/吨。随着遗传改良和操作优化可能带来的单产提高,纤维农用木材的交付成本可以降低至56美元/吨。相比之下,在研究期间,三个合作制浆厂购买的最高成本木材为50.23美元/吨。纤维场的净现值为“绿色”库存,是根据三个东南合作制浆厂的实际木材成本和库存水平确定的。对于“绿色”库存分析,这三个纸浆厂都将使用纤维农场(单产较高)作为“绿色”库存来降低其总体木材成本,主要是通过减少木材堆场中的干燥库存所需的木材数量。 “干旱”年份的积蓄节省抵消了硬木人工林交付的较高成本。进行了敏感性分析,以确定其中一个合作制浆厂的最佳尺寸的纤维场,并指出800英亩将是最有利的。

著录项

  • 作者

    Gallagher, Thomas Vincent.;

  • 作者单位

    Virginia Polytechnic Institute and State University.;

  • 授予单位 Virginia Polytechnic Institute and State University.;
  • 学科 Agriculture Forestry and Wildlife.; Agriculture Wood Technology.; Engineering Agricultural.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 159 p.
  • 总页数 159
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 森林生物学;森林采运与利用;农业工程;
  • 关键词

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