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品格为中国城市规划设计研究院《科技论文》提供"母语级翻译" (Native-tongue Level Translation)。
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既有研究多是基于单一热电厂,对生物质原料的最佳收集半径和收集方式的研究,然而,在传热阈值的限制下,即使对于县市行政尺度来说,单一热电厂也无法覆盖整个需求范围。另外,既有文章多集中于对收集半径的研究,忽略了道路网络对收集距离的影响。而基于特定研究案例得出的最经济运输半径可能不适用于其他地区,特别是道路网络密度相差较大的地区。因此,本研究致力于在多热电厂前提下,探究生物质原料的收集距离阈值与能源自给自足的变化模式,从而合理规划生物质资源点的运输量和运输路线,达到降低运输成本和提高能源自给自足程度的目的。
Existing studies on the optimal collection radius and collection method of biomass raw materials are mostly based on a single biomass CHP plant. Yet, with limitations in the heat transfer threshold, even for just a county or city, it’s impossible for a single biomass CHP plant to cover the whole range of demand. Furthermore, a majority of the studies today have placed focus on the collection radius, ignoring the effect of road network on the collection distance. The most economical transportation radius based on a specific case may not be applicable to other areas. This is particularly true with areas where the road network density varies significantly. Therefore, under the premise of multiple biomass CHP plants, this study is committed to exploring the BCDT and the change pattern of energy self-sufficiency. The aim is to reasonably plan the transportation volume and transportation route of biomass resource points, then ultimately reduce the transportation costs and enhance energy self-sufficiency.
 
当热电厂的BCDT变大时,资源点可选择的运输目的地变多,生物质原料的分配方案更加灵活。如Fig.2所示,以资源点1为例,当BCDT为XXkm时,资源点1的原料只被允许运输至距离最近的热电厂A,如果热电厂A服务范围内的能源需求量低于收集范围内的资源潜力,资源点1的生物质原料将被浪费;而当BCDT增加至XXkm时,资源点1的原料还可以被运输至资源潜力不足的热电厂B,这就会提高整体的资源利用率。
As the BCDT of a biomass CHP plant increases, more transportation destinations will become available for the resource points. This also means more flexibility in the distribution plan of biomass raw materials. Taking resource point 1 as an example (as shown in Fig. 2), when the BCDT is XX km, the raw materials of resource point 1 can only be transported to the nearest biomass CHP plant A. If the energy demand within the service scope of biomass CHP plant A is lower than the resource potential within the collection range, the biomass raw materials of resource point 1 will be wasted. When the BCDT increases to XX km, the raw materials of resource point 1 can also be transported to biomass CHP plant B with insufficient resource potential, improving the overall resource utilization rate.
 
可以看出,BCDT越大,对于资源利用率和能源自给自足水平的提高越有利;然而,考虑到运输成本,BCDT无法无限制地扩大。因此,本研究旨在探究最经济的BCDT,在保证较低运输成本的同时提高资源利用率和能源自给自足水平,为生物质原料的统一规划提供数据支持。
This shows that the greater the BCDT, the better the resource utilization rate and energy self-sufficiency. Considering the transportation costs, however, there are limits to how much the BCDT can expand. As such, this study aims to explore the most economical BCDT so that the resource utilization rate and energy self-sufficiency can be improved while ensuring a lower transportation cost. This will also in turn provide data support for the unified planning of biomass raw materials.

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