摘要
基于热力学第二定律分析法,建立由太阳能、生物质能组成的辅助系统作用于燃煤机组加热器汽侧的损分布矩阵模型,以某300 MW机组为例,分析该混合发电系统的标准煤耗率降低量及CO_2、SO_2、NOx减排量等指标。结果表明:引入辅助系统后,各加热器损失均随分流系数增大而减小;辅助系统作用于高加侧各加热器时,混合发电系统的经济性指标均高于低加侧;在完全排挤汽轮机抽汽工况下,各热经济性指标均达最大值,标准煤耗率降低量及CO_2、碳粉尘、SO_2和NO_x减排量分别达20.43 g/(k Wh)、8.28万t/a、2.29万t/a、2527.79 t/a、1263.89 t/a。
An integrated renewable energy combined cycle system provides an efficient way to adjust energy structure and relief energy conservation and emission reduction pressure. Taking a 500 MW unit for example, based on exergy analysis of the Second Law of Thermodynamics, a general matrix model was established when auxiliary system acting on the location of steam extraction in heaters. Energy conservation and emission reduction potentials, such as specific coal consumption, CO2, SO2, and NOx emission reductions were investigated. Results showed that the exergy losses of heaters are decreased after introducingauxiliary system. The hybrid power generation system achieves optimal economy when auxiliary system acts on the high pressure heaters. Thermal economic indexes reach maximum values under the condition of turbine extraction totally supplanted. The reduced specific coal consumption reaches 20.43 g/（kWh） , emission reduction of CO2, carbon dust, SO2 and NOx reaches 82800 t/a, 22900 t/a, 2527.79 t/a and 1263.89 t/a, respectively.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2015年第7期1717-1723,共7页
Acta Energiae Solaris Sinica
关键词
太阳能和生物质能
混合发电系统
[火用]损分布
节能减排
solar and biomass energy
hybrid power generation system
exergy loss distribution model
energy-saving and emission-reduction
