In aspect of energy pricing,establishment principle of existing complementary equation does not consider the level of energy quality which means its irrationality. And there are no precise provisions in establishment principle for determining basis for energy pricing by using what kind of principle. Therefore,this paper proposes concept of energy quality coefficient which is used for improving establishment principle of the complementary equation and establishing the complementary equa-tion so as to make energy flow unit price match with its quality. Meanwhile,energy loss is re-priced as well. Taking some N300-16.67/537/537 thermal power unit for an example,this paper carries out thermo-economics analysis for accounting mode and compares with exergy energy coefficient method. Results indicate that exergy economic coefficients of the deaera-tor and No.7 low pressure heater change a lot while those of other equipments change a little which prove veracity of energy quality coefficient method. This method is also useful to be referred for pricing for different products of thermo-electric co-generation.%现有补充方程建立原则在能量定价方面没有考虑能量品质的高低,存在着不合理性;并且对于以何种原则作为能量定价的依据,补充方程建立原则中没有明确的规定.为此提出了能质系数概念,并利用该系数,改进了补充方程建立原则,并建立了补充方程,使得能流单价与其品质相匹配;同时对能量损失进行了重新定价.以某N300-16.67/537/537火力机组为例,进行了会计模式热经济学分析,并与质系数法进行了比较.结果表明,除氧器与7号低压加热器的经济系数变化较大,其他设备变化均很小,由此验证了能质系数法的准确性.对于热电联产所生产的不同产品的定价,也可参考这种方法.
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