300MW热电联产供热系统分析与能耗计算

热电联产是能源利用的有效方式。针对目前热电联产普遍采用的抽汽供热模式,基于一般化供热系统原理,进行热电联产供热的热力学本质分析,提出循环水直供直连供热模式,以降低系统能耗。利用串联系统单耗分析方法,针对300 MW热电机组进行一般化供热系统的单耗分析计算,得到热电联产传统抽汽供热模式各子系统的能耗分布,为热电联产总能系统能耗分析的实施奠定了基础,并据此计算分析了热电联产循环水直供直连供热模式的能耗分布。对比可知,热电联产循环水直供直连供热模式单耗为32.70kg/GJ,比传统抽汽供热模式单耗(60.62kg/GJ)降低近1/2,热电联产供热系统节能降耗尚存巨大空间。

Analysis and Calculation on Energy Consumption of 300MW CHP Heating Systems

Combined heat and power(CHP) is the effective way of energy utilization.For the current situation that the extraction condensing heating mode is commonly used,in order to decrease the energy consumption of heating system,the mode of heating with circulating water from a CHP unit was proposed based on the theory of generalized heating system and the thermodynamic essence of CHP.With the method of specific consumption analysis,the specific consumption of heating system with a 300 MW CHP unit was calculated,and the energy consumption distribution of the extraction condensing heating mode was presented.Based on the specific consumption calculation,the energy consumption distribution of heating with circulating water from a CHP unit was analyzed,which has a remarkable effect on energy conserving and the specific consumption could be reduced from 60.62 kg/GJ to 32.7 kg/GJ,indicating that there is still a huge potential for energy saving and consumption reducing of the CHP system.