1000MW超超临界机组热耗率和供电供热煤耗模型应用分析  

Analysis and application of the heat rate and power and heat supply coal consumption models for 1000 MW ultra-supercritical units

作　　者：赵俊杰[1,2] 项连清[2] 俞路军 刘静然[2] 蒋和定 朱盈 

机构地区：[1]国电电力发展股份有限公司,北京100101 [2]国电浙江北仑第一发电有限公司,浙江宁波315800 [3]国电电力新能源技术有限公司,北京100101

出　　处：《能源工程》2016年第6期70-75,共6页Energy Engineering

摘　　要：针对1000 MW超超临界机组,建立了实际运行工况下的热耗率、供电煤耗和供热分摊煤耗的计算模型,定量分析负荷、泄漏和抽汽等因素对机组实际运行效率的影响规律。结果表明,负荷低于500 MW,热耗率随负荷减小而急剧增加。相比锅炉热效率,汽轮机热耗率对综合供电煤耗率的影响更大。本研究中基于热量法计算得到的供热分摊系数比基于实际焓降法高约30%,供热影响实际供电煤耗6.7-14.2 g/k Wh。A model for 1000 MW ultra-supercritical units was established to quantitatively study the effects of the unit load, leakage and steam extraction on the heat consumption rate, power and heat supply coal consumption as well as the actual overall efficiency. The results showed that the heat consumption rate increased more sharply by reducing the unit load when the unit load was smaller than 500 MW. The heat rate of the steam turbine had larger effects than the boiler efficiency on the overall power supply coal consumption. The heat allocation ratio based on the calorimetric method was 30% larger than that based on the actual enthalpy drop method. The effect of heat supply lead to a reduction of 6.7 - 14.2 g/kWh for the actual power supply coal consumption.

关 键 词：汽耗率 热耗率 供电煤耗 供热分摊比 实际焓降法 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]