烟气余热复合供暖对生物质直燃发电系统性能的影响

Effect of flue gas waste heat combined heating on performance of biomass direct combustion power generation system

针对生物质直燃发电系统排烟含水蒸汽量大、潜热回收潜力巨大的状况,首次提出了一种生物质直燃发电与吸收式热泵和水源热泵集成的热电联供系统,利用TRNSYS软件对复合供暖系统进行了建模,分析了系统的稳定性,并对系统进行了分析及系统效益分析.结果表明:复合供暖系统在采暖季可以稳定为用户输出热量,其中采暖季吸收式热泵运行的性能系数均值为1.61,水源热泵的性能系数平均值为4.32,复合供暖系统的效率为41.85%.加入复合供暖系统后,节能率提升了5.2%,综合能源利用率提升了7.8%,烟气余热回收利用率提升了15.5%,年节约标煤6416.5 t,年减排CO2量16682.98 t、SO2量128.33 t、NOX量449.16 t.

Aiming at the situation that the biomass direct-fired power generation system has a large amount of water vapor and latent heat recovery potential,a combined heat and power system integrating biomass direct-fired power generation with an absorption heat pump and a water source heat pump is proposed for the first time.The composite heating system is modeled by TRNSYS software,and its stability of the system was analyzed.The exergy analysis of the system was performed,and the benefits of the system were finally analyzed.The results show that the composite heating system can stabilize the output heat for the user during the heating season,and the average coefficient of performance of the absorption heat pump in the heating season is 1.61,and the average coefficient of performance of the water source heat pump is 4.32.The exergy efficiency of the composite heating system is 41.85%.After adding the compound heating system,the energy saving rate increased by 5.2%,the comprehensive energy utilization rate increased by 7.8%,the waste gas heat recovery rate increased by 15.5%,the system can save 6416.5 t of standard coal annually,reducing 16682.98 t of CO2,128.33 t of SO2,and 449.16 t of NOX each year.