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Conversion factors for residential wood energy in the European Union: an introduction to harmonizing units of measurement
Renewable and Sustainable Energy Reviews ( IF 16.3 ) Pub Date : 2020-11-20 , DOI: 10.1016/j.rser.2020.110491
S. Glasenapp , M. Fonseca , H. Weimar , P. Döring , F.X. Aguilar

Wood energy data are reported in forest products and energy statistics but current use of heterogeneous units can result in major inconsistencies. Harmonization of wood energy statistics can benefit data quality and improve measuring sustainable practices, better informing policy-makers and analyzing feedstock competition. Harmonization of wood energy data and subsequent application in the forest product and energy sectors require appropriate conversion factors. We provide conversion factors for forest energy products relative to weight and volume for the residential sectors of EU28 member states. Selected forest products include wood from primary, secondary and tertiary sources considering differences in properties affecting conversion factors. Proposed conversion factors were derived from information on moisture content, heating value, density and changes in wood volumes due to swelling and shrinkage of wood. Heating values relative to weight denote conversion factors to transform weight to energy units that ranged from 13.88 to 17.14 MJ/kg. Computation of heating values relative to volume ranged from 7316 to 11,053 MJ/m³. The use of extreme conversion factors in a sensitivity assessment showed that the ranges between minimum and maximum values accounted for as much as 27% of total wood energy consumption. Application of conversion factors to EU28 residential wood energy consumption revealed inconsistencies between forest products and energy statistics. Closer collaboration between experts and use of universal conversion factors at national levels will likely improve data quality and direct comparability. Conversion factors used in the residential sector can facilitate harmonization in non-residential sectors, but sector-specific product characteristics require further adjustment.



中文翻译:

欧盟住宅木材能源的转换因子:统一计量单位的简介

森林产品和能源统计中报告了木材能源数据,但是当前使用异构单位可能导致严重的不一致。统一木材能源统计数据可以提高数据质量,并改善对可持续做法的衡量,更好地向决策者提供信息并分析原料竞争。统一木材能源数据并随后应用于森林产品和能源行业需要适当的换算系数。我们提供了欧盟28个成员国住宅部门相对于重量和体积的森林能源产品转换因子。考虑到影响转化因子的特性差异,精选的林产品包括来自一次,二次和三次来源的木材。拟议的转换因子是从有关水分,热值,密度和木材体积的变化(由于木材膨胀和收缩)。相对于重量的热值表示将重量转换为能量单位的转换因子,范围从13.88到17.14 MJ / kg。相对于体积的热值计算范围为7316至11,053 MJ /m³。在敏感性评估中使用极端转换因子表明,最小值和最大值之间的范围占木材总能耗的27%之多。将转换因子应用于EU28住宅木材能耗时,发现林产品与能源统计之间存在不一致之处。专家之间的更紧密合作以及在国家一级使用通用转换因子可能会改善数据质量和直接可比性。

更新日期:2020-11-21
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