Time Series Analysis Of Unit Consumption Of Heating Fuel For Heating Unit

In thermodynamics,the methods of energy consumption analysis and evaluation mainly include thermal efficiency method based on the first law of thermodynamics and exergic analysis method or entropy analysis method based on the second law of thermodynamics.In the process of literature reading and searching,it is found that the research on energy consumption has been relatively in-depth in the industry,but there are few studies on the analysis of the change of time sequence of fuel consumption.This is because it is difficult to grasp the weather change,so it is difficult to grasp a qualitative law.The purpose of this paper is mainly to analyze the process of heating fuel consumption and the second law efficiency calculation related to time and to make the change of the consumption and energy using efficiency more clear.Based on the changes in energy consumption,we can timely adjust the parameters and running status,as well as get the analysis on how to deal with emergency.The research methods in this paper are mainly based on the unit consumption analysis theory,exergic analysis,unit consumption analysis method and energy efficiency assessment method of cogeneration units in the book Modern Energy Saving Principle.This paper analyzes concentrated heat load forecasting methods and several types of cogeneration units.Then it selects the suitable research unit type and load forecasting method.Based on the meteorological conditions,the area heat index method is used to forecast and calculate the heating load demand of the designated area.By associating the change of heat load with the change of time through the parameter of temperature,a correlation between the change of heat load and time is obtained.Then it uses the parameter variable of the heat load required at different times,and calculates the unit fuel consumption and the second law of heating efficiency of the fuel for the selected pumping and condensing units,and gets the change relationship between them.In view of the current situation of large heat demand for heating in winter,this paper analyzes the unit’s unit energy consumption and the second law efficiency of fuel after the optical shaft transformation,and compares and analyzes the unit energy consumption and the second law efficiency of heating fuel in extreme weather,and puts forward a series of measures to deal with extreme weather.In the operation mode of "determining power by heat" of cogeneration units,heating and power generation cannot reach the most suitable state,and at this time,neither the efficiency of the second law of heating nor the efficiency of power supply is high.Therefore,this paper analyzes several measures to participate in peak regulation operation of cogeneration units.These measures are of great help to the energy saving of units.This paper finally calculates that,under the design condition,the typical daily heat load is inversely correlated with the unit heating fuel consumption,and positively correlated with the unit fuel heating efficiency of the second law..In a typical day,the maximum unit consumption of heating fuel is about 23.43kg/GJ,which occurs at about two o’clock in the afternoon.At this time,the efficiency of the second law of heating for fuel is about 0.517.The lowest unit consumption of heating fuel is about 22.06,which occurs at about 2 a.m.At this time,the efficiency of the second law of heating for fuel is about 0.585,which is about 7 percentage points higher than the lowest.At extremely low temperature,even if all the steam is used for heating,the exhaust steam is still not enough to supply the heat load.At this time,other boiler heating or electric heating methods must be adopted to supply the heating demand.According to the analysis and calculation,the second law of heating efficiency of the fuel decreases by about 10 percentage points compared with the typical day in extreme weather with high temperature,and the energy utilization efficiency is low at this time.By using heat storage,a certain level of heat supply can be maintained and the second law of heating efficiency of fuel can be guaranteed,and the unit can better participate in the peak regulation of the power grid.