基于沼气的热电气联供系统全工况模型与性能分析

发布时间：2018-05-13 06:25

本文选题：生物燃料 + 发酵　；参考：《化工学报》2017年05期

【摘要】：为了解决我国城镇化进程中日益增长的能源需求,高效循环利用有机废弃物,缓解农村环境污染问题,构建了基于沼气的内燃机热电气联供系统,将生物质厌氧发酵、内燃机热电联产、补充热源、用户侧需求等有机联系起来建立系统全工况动态数学模型,并以兰州地区5户建筑面积226.8 m2的新农村建筑为例,进行系统全年逐日供需能量平衡分析及性能分析。结果表明:寒冷地区新农村建筑负荷与商业建筑存在明显不同,冬夏季热负荷差异大,全天电负荷波动很明显;在充分考虑厌氧发酵生物质能源转化效率、热量传输及换热效率和火电厂发电效率的情况下,联供系统全年一次能源利用率为37.85%;与传统农村分供系统相比,系统一次能源节约率为17.12%。系统性能分析结果可为我国生物质沼气集中热电联产在村镇的规模化应用提供一定理论依据。
[Abstract]:In order to solve the increasing energy demand in the process of urbanization in China, recycle the organic waste efficiently and alleviate the problem of environmental pollution in rural areas, an internal combustion engine thermal electric co-supply system based on biogas was constructed to ferment biomass anaerobic. The internal combustion engine heat and power cogeneration, supplementary heat source and user side demand are organically connected to establish a dynamic mathematical model of the system under all working conditions. Taking five new rural buildings with a building area of 226.8 m2 in Lanzhou area as an example, The energy balance of supply and demand and the performance analysis of the system are carried out day by day. The results show that the load of new rural buildings in cold areas is obviously different from that of commercial buildings, and the heat load varies greatly in winter and summer, and the whole day electricity load fluctuates obviously, and the efficiency of energy conversion from anaerobic fermentation to biomass energy is fully considered. In the case of heat transfer and heat transfer efficiency and power generation efficiency of thermal power plant, the annual energy utilization ratio of co-supply system is 37.85, and the energy saving rate of the system is 17.12 compared with the traditional rural power sharing system. The results of system performance analysis can provide a theoretical basis for the large-scale application of biomass biogas concentrated heat and power cogeneration in villages and towns.
【作者单位】：兰州理工大学能源与动力工程学院;甘肃省生物质能与太阳能互补供能系统重点实验室;西北低碳城镇支撑技术协同创新中心;
【基金】：国家自然科学基金项目(51166008,51676094) 国家高技术研究发展计划项目(2014AA052801)~~
【分类号】：TU995

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