Biomass direct-fired power generation system in China: An integrated energy, GHG emissions, and economic evaluation for Salix
Biomass direct-fired power generation system in China: An integrated energy, GHG emissions, and economic evaluation for Salix
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DOI：
10.1016/j.enpol.2015.04.025
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发表时间：
2015-09
期刊：
影响因子：
9
通讯作者：
Changbo Wang;Lixiao Zhang;Yuan Chang;Mingyue Pang
中科院分区：
文献类型：
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作者：
Changbo Wang;Lixiao Zhang;Yuan Chang;Mingyue Pang
为了更好地了解中国生物质发电的选择，本研究对中国沙柳进行了综合能源、环境和经济评价，并选择内蒙古典型的沙柳直燃发电系统（SDPGS）进行案例研究。开发了分层混合生命周期评估（LCA）模型来计算SDPGS的“种植到电线”（PTW）能源消耗、温室气体（GHG）排放以及经济成本和利润，包括原料种植、电厂建设和运营以及有/没有政府补贴的上网电价。结果显示，Salix 的 PTW 能耗和温室气体排放量分别为 0.8 MJ/kWh 和 114 g CO2-eq/kWh，表明能源投资回收期 (EPBT) 为 3.2 年。如果没有政府补贴，SDPGS 在经济上是不可行的。 PTW 成本主要来自原料种植。即使发电厂仅以设计容量的 60% 运行，节能和温室气体减排效益仍然强劲。未来我国生物质发电的发展需要科学规划，保证充足的原料供应。此外，还需要技术进步、成熟的产业链和合理的电价政策，才能发挥生物质发电潜在的能源和环境优势。
To gain a better understanding of the options of biomass power generation in China, this study presented an integrated energy, environmental, and economic evaluation for Salix in China, and a typical Salix direct-fired power generation system (SDPGS) in Inner Mongolia was selected for case study. A tiered hybrid life cycle assessment (LCA) model was developed to calculate the “planting-to-wire” (PTW) energy consumption, greenhouse gas (GHG) emissions, and economic cost and profit of the SDPGS, including feedstock cultivation, power plant construction and operation, and on-grid price with/without government subsidies. The results show that the PTW energy consumption and GHG emissions of Salix are 0.8 MJ/kWh and 114 g CO2-eq/kWh, respectively, indicating an energy payback time (EPBT) of 3.2 years. The SDPGS is not economically feasible without government subsidies. The PTW costs are dominated by feedstock cultivation. The energy saving and GHG mitigation benefits are still robust, even when the power plant runs at only 60% design capacity. For future development of biomass power in China, scientific planning is necessary to guarantee a sufficient feedstock supply. In addition, technology progress, mature industrial chains, and reasonable price setting policy are required to enable potential energy and environmental advantages of biomass power moving forward.