基于等价煤耗法的热电联产机组热经济性分析

热电联产机组热经济性代表了热电厂能量利用水平、热功转换技术的先进水平和运行的经济水平,因而准确地分析热电联产机组热经济性显得尤为重要.等价煤耗法是把电厂实际发电效益和供热效益通过热、电等价转换,得到等价发电量,进而得到等价煤耗率.结合300 MW机组,首先分别用热量法、实际焓降法和等价煤耗法对热电联产机组煤耗率进行计算,并通过分析比较,证明了等价煤耗法在评价热电联产机组方面的可行性和准确性；其次比较了同一热电联产机组在供热期和非供热期的煤耗率——供热期煤耗率比非供热期煤耗率低,从而证明了热电联产机组在节能方面优于纯凝机组.

Thermo-Economic Analysis of Cogeneration Unit Based on Equivalent Coal Consumption Method

Due to critical role of thermal efficiency in evaluating energy utilization efficiency,the advantage of power-to-heat conversion technology,the economy of operation of thermoelectric plant,and accurate thermo-economic analysis of cogeneration unit are of great importance.The feasibility and exactness of equivalent coal consumption method is first showed in assessing of cogeneration unit overall heat quantity method and actual enthalpy drop method by contrastive studies carried out in the case of 300 MW unit.Then,since heating period coal consumption rate is lower than the off-heating period rate within the framework of that method,cogeneration unit superior to condensation unit in energy saving are presented.