Thermal Performance of Biomass-Fired Steam Power Plant
Thermal Performance of Biomass-Fired Steam Power Plant
复制标题
生物质蒸汽发电厂的热性能
DOI：
10.1115/1.4035926
复制
发表时间：
2017
影响因子：
2.1
通讯作者：
A. Hachicha
中科院分区：
文献类型：
--
作者：
C. Ghenai;A. Hachicha
本文介绍了 10MW 生物质蒸汽发电厂的性能结果。主要目标是测试使用不同类型生物质燃料的发电厂的性能：甘蔗渣、玉米秸秆、森林残留物和城市木材残留物。生物质燃料与次烟煤混合，比例为0-100%。研究了过量燃烧空气、烟气温度和寄生负荷对发电厂性能的影响。热质平衡分析的输出结果包括月度和年度发电量、容量系数 (CF)、锅炉效率 (BE)、热效率以及总热耗率和净热耗率。结果显示，当生物质含量从 6% 增加到 100% 时，年能源产量略有下降 (1.7%)，但二氧化碳当量排放量却大幅下降。将过量助燃空气从 25% 减少到 5%，将使锅炉和热效率提高 2%，年发电量提高 2%。这主要是由于随着过量燃烧空气的减少，干烟气损失（DFGL）减少。寄生负载从 10% 减少到 2% 将使发电厂性能提高 9%。这可以通过在发电厂中使用更高效的泵、风扇和输送机来实现。由于干烟气损失减少，烟气温度从 480°F 降低至 360°F，发电厂性能提高了 4.4%。
This paper presents results on the performance of 10 MW biomass-fired steam power plant. The main objective is to test the performance of the power plant using different type of biomass fuels: bagasse, corn stover, forest residues, and urban wood residues. The biomass fuel was mixed with sub-bituminous coal with fractions of 0–100%. The effect of excess combustion air, flue gas temperature, and the parasitic loads on the power plant performance was investigated. The output results from the heat and mass balance analysis include the monthly and annual electrical power generated, capacity factor (CF), boiler efficiency (BE), thermal efficiency, and gross and net heat rate. The results show a slightly decrease (1.7%) of the annual energy production when the biomass fractions increase from 6% to 100% but a substantial decrease of the CO2equivalent emissions. A decrease of the excess combustion air from 25% to 5% will increase the boiler and thermal efficiencies and the annual energy output by 2%. This is mainly due to the reduction of the dry flue gas losses (DFGLs) with the reduction of the excess combustion air. A reduction of the parasitic loads from 10% to 2% will increase the power plant performance by 9%. This can be achieved by using more efficient pumps, fans, and conveyors in the power plant. A reduction of the flue gas temperature from 480 °F to 360 °F increases the power plant performance by 4.4% due to the reduction of the dry flue gas losses.