Designing the scale of a woody biomass CHP considering local forestry reformation: a case study of Tanegashima, Japan
Designing the scale of a woody biomass CHP considering local forestry reformation: a case study of Tanegashima, Japan
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考虑当地林业改革的木质生物质热电联产规模设计：以日本种子岛为例
DOI：
10.1016/j.apenergy.2017.04.021
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发表时间：
2017
期刊：
影响因子：
11.2
通讯作者：
Y.
中科院分区：
文献类型：
--
作者：
Kanematsu;Y.;Oosawa;K.;Okubo;T.;Kikuchi;Y.
生物质已经成为一种可再生能源，但要使其真正实现可再生，还需要持续的管理。世界上某些地区的人工林正面临改革的挑战，因为对木材的需求停滞不前或过去砍伐森林造成的退化造成了森林年龄等级的严重分布不均。在这些地区，加工木材的数量和总生物量必须由林业改革时间表加以控制。特别是对于需要持续和充足木材供应的能源工厂，应仔细设计工厂的规模，以维持该区域协调一致的需求/供应平衡。在本研究中，我们考虑了日本偏远岛屿种子岛使用木质生物质进行区域供热和制冷（DHC）的热电联产（CHP）系统的规模设计，除了减少其化石燃料消耗外，还需要立即进行林业改革。开发了一个过程模型，表示与生物质热电联产系统生命周期相关的物质和能量流，该模型考虑了木材消耗对热电联产规模的依赖性，以及其他设计参数。为实现林业可持续规划，计算了未来100年的年木材供应概况，成为制约热电联产资源采购可行性的制约因素。未来20年木材供应量的最大值与最小值之比约为1.8。利用所建立的模型进行模拟和生命周期评估（LCA），确定了覆盖消费者840千瓦时和1470千瓦时生物质能源总热电需求的热电联产规模。通过比较LCA结果、木材消耗和木材供应曲线，我们找到了森林资源状况各阶段可行和有效的尺度范围。我们已经能够证明，在特定地区木质生物质的利用应该以可持续的方式解决林业改革问题。
Biomass has become a renewable resource for energy, but it needs continuous management to make it truly renewable. Planted forests in particular areas in the world are facing the challenges of reformation because of the severe maldistribution of forest age-classes caused by a stagnation in demand for wood or degradation by past deforestation. In these regions, the amount of wood processed and the overall biomass must be controlled by a schedule of forestry reformation. Particularly for energy plants, where a continuous and adequate supply of wood is required, the scale of the plants should be carefully designed to maintain a harmonized demand/supply balance in the region. In this study, we considered the scale design for a combined heating and power (CHP) system using woody biomass for district heating and cooling (DHC) in Tanegashima, a remote island in Japan, which requires immediate forestry reformation in addition to mitigating its fossil-fuel consumption. A process model representing material and energy flows associated with the life cycle of a biomass CHP system was developed, which considered the dependency of timber consumption on the scale of the CHP, together with other design parameters. The profile of the annual timber supply for the next 100 years to achieve sustainable forestry planning was calculated, which became the constraint on the feasibility of resource procurement for CHP. The ratio between the maximum and minimum timber supply in the next 20 years was determined to be about 1.8. Through simulation and life cycle assessment (LCA) using the developed model, CHP scales were specified to cover the overall heat and power demand of consumers for biomass-derived energy at 840 kWewith 1470 kWth. We found feasible and effective scale ranges for the various stages of forest-resource status by comparing LCA results, timber consumption, and profiles for timber supply. We have been able to demonstrate that woody biomass utilization in a specific area should address forestry reformation in a sustainable way.