Analysis of Energy Consumption Characteristics of a 1 000 MW Unit Supplying Multiple Energy Grades of Industrial Steam
In order to analyze the energy consumption characteristics of different grades of steam supplied by industrial steam supply units,considering the multi-heat user parameters and multiple heat supply steam sources of industrial steam supply units,the variable working condition calculation and energy con-sumption characteristic analysis models of heating units were established.Taking a 1 000 MW industrial steam supply unit as an example,the influence of factors such as the electric load,medium-pressure in-dustrial heat load,low-pressure industrial heat load,and supply steam source point on the energy con-sumption characteristics of the unit was studied by the analytical methods including heat method,actual enthalpy drop method,exergy method and equivalent enthalpy drop method.The results show that the heating coal consumption rate calculated by the same method under different heating modes has the same trend with the power load,but has little variation with the heat load;the power generation coal consump-tion rate calculated by the same method under different heating modes has the same trend with heat load,but has different trends with power load;when the power load is 620 MW and the heat load is 220 t/h,in the mode of the hot reheat steam for the medium pressure steam,the heating coal consumption rates al-located with the heat method,exergy method,equivalent enthalpy drop method and actual enthalpy drop method are 37.46,26.43,25.83,and 22.52 kg/GJ,respectively,the power generation coal consump-tion rates are 280.39,291.80,292.42,295.84 g/(kW·h),respectively.
heating unitoff-designheat and power allocationenergy consumption characteristics
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