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为达到火电机组节能降耗的目的,以火电机组热经济性分析的统一物理模型和数学模型为基础,借助偏微分理论和梯度算子,建立了主蒸汽温度变化对机组经济性影响的通用强度系数计算模型。主汽温强度系数的提出使得在计算主汽温改变对煤耗率的影响时不用进行复杂的建模和计算,而仅利用对应负荷下的强度系数乘以主汽温变化量就可得到。通过对某600 MW机组典型工况的计算,表明应用强度系数模型计算主蒸汽温度改变对煤耗率的影响时计算量小、精度高。
In order to achieve the purpose of saving energy and reducing energy consumption of thermal power units, based on the uniform physical model and mathematical model of thermal economy analysis of thermal power units, partial strength and temperature gradient of main steam temperature changes are established based on partial differential theory and gradient operator. Coefficient Calculation Model. The proposed main steam temperature intensity coefficient makes it unnecessary to carry on complicated modeling and calculation when calculating the influence of the main steam temperature change on the coal consumption rate, but only by multiplying the main steam temperature variation by the strength coefficient under the corresponding load. The calculation of a typical working condition of a 600 MW unit shows that the calculation of the influence of the change of the main steam temperature on the coal consumption rate is small and the precision is high by using the intensity coefficient model.