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首页> 外文期刊>Journal of Cleaner Production >Life cycle assessment of small-scale combined heat and power plant: Environmental impacts of different forest biofuels and replacing district heat produced from natural gas
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Life cycle assessment of small-scale combined heat and power plant: Environmental impacts of different forest biofuels and replacing district heat produced from natural gas

机译：小型热电联产厂的生命周期评估：不同森林生物燃料对环境的影响以及替代天然气产生的区域热

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摘要

Forest biomass is used in many countries as an abundant and easily accessible source of renewable energy. While forest biomass has certain advantages in terms of carbon sink capability, it cannot be considered an emission-free energy source, and the environmental differences among various forest biomass sources have been unclear. This study uses life cycle assessment for two purposes. The first is to quantify the environmental impacts of the energy production of a small-scale, combined heat and power production plant utilizing different forest biomasses. The second aim is to estimate the change in environmental impacts on district heat production from natural gas when partially replacing it by heat from the combined heat and power plant. The environmental impacts include global warming potential, acidification potential, and eutrophication potential. The calculated environmental impacts of utilizing different forest biofuels in the CHP plant in relation to produced energy are 2.2-5.1 gCO2,eq MJ(energy) excluding biogenic carbon emission, 59-66 gco(2).eq/MJ(energy) with biogenic carbon emission, and 133-175 mg(so2,eq)/MJ(energy) and 18-22 mg(so2,eq)/MJ(energy) with pellets, showing the highest values. The results indicate that by using forest biomass instead of natural gas in energy production, the global climate impacts are reduced when biogenic carbon is excluded, while the local effects are higher (acidification.potential and eutrophication potential). Including biogenic carbon reduces the calculated climate benefit since the total emissions end up being 4-7% over those of natural gas use. The potential benefits need to be weighed against the possible drawbacks. (C) 2017 Elsevier Ltd. All rights reserved.
机译：森林生物量在许多国家被用作丰富且易于获得的可再生能源。尽管森林生物量在碳吸收能力方面具有某些优势，但不能认为它是无排放能源，而且各种森林生物量资源之间的环境差异还不清楚。本研究将生命周期评估用于两个目的。首先是量化利用不同森林生物量的小型热电联产工厂能源生产对环境的影响。第二个目标是估算当天然气被热电厂联合使用的热量部分替代时，对天然气对区域供热产生的环境影响的变化。环境影响包括全球变暖潜能，酸化潜能和富营养化潜能。热电联产厂利用不同森林生物燃料产生的能源对环境的影响估计为2.2-5.1 gCO2，eq MJ（能源）（不包括生物碳排放量），59-66 gco（2）.eq / MJ（能源）与生物能源碳排放量以及颗粒的133-175 mg（so2，eq）/ MJ（能量）和18-22 mg（so2，eq）/ MJ（能量），显示出最高值。结果表明，通过使用森林生物质代替天然气进行能源生产，当排除生物碳时，全球气候影响减少，而局部影响更高（酸化，潜力和富营养化潜力）。包括生物碳会减少计算得出的气候效益，因为总排放量最终比天然气使用量高4-7％。需要权衡潜在的好处和可能的缺点。 （C）2017 Elsevier Ltd.保留所有权利。

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