Research On Key Technology And Evaluation System Of Electrical Design In University Buildings Based On Energy Efficiency Improvement

In recent years,the problem of high energy consumption in Colleges and universities has been paid more and more attention in related fields.More and more experts and scholars have realized the seriousness and urgency of energy waste in Colleges and universities.Research shows that the total amount of energy consumed in a city that accounts for the total amount of 3%-7%building accounts for more than 30%of the energy consumed in this city.Therefore,the energy saving work in Colleges and universities is urgent.At present,building management emphasizes the whole process,so energy conservation must be taken into account at the beginning of building design in Colleges and universities.In addition,after taking relevant energy saving measures,the energy saving effects of energy saving measures need to be quantified and evaluated,so that the follow-up improvement work can be carried out.Therefore,this paper,from the two angles of the electrical design of colleges and universities and the evaluation of the electrical energy saving of the colleges and universities,studies the energy conservation of the buildings in Colleges and universities.The specific research contents are as follows:First,the selection of the capacity of the main transformer of the campus.In view of the problem of the large capacity of the main transformer in the campus,the grey prediction theory is introduced to the selection of the main transformer capacity on the basis of the study of the characteristics of the University's electricity use,and it is shown by an example that the transformer selection method proposed in this paper reduces the capacity of the transformer without affecting the campus power.Second,the selection of campus cable section.To understand that the current power supply and distribution design manual does not have the maximum number of hours to use the maximum load for the selection of University cable sections,so on the one hand,we collect the data from the university campus to calculate the maximum number of hours on the campus load;on the other hand,collect the latest cable prices and the electricity number,in terms of the parameters of the economic current density formula.On the basis of sensitivity analysis,a new economic current density curve is drawn and used to select the campus cable.Third,the establishment of evaluation index system for electrical energy saving in Colleges and universities.On the basis of reference literature,following the principles of systematic,hierarchical and data availability index selection principles,using Method of Delphi and Fishbone diagram to screen the main factors affecting the effect of building electrical energy saving,from four aspects source,grid,load and building structure to construct the evaluation index of the electrical energy saving of the campus building.System;Fourth,the electrical energy saving evaluation of campus building.The extension theory is applied to the electric energy saving evaluation of campus building.The weight of each index of the energy saving evaluation system is determined by the correlation function,and the calculation example is carried out according to the actual collection data.The evaluation score of the building electrical energy saving is 2.86,indicating that the building has a large energy saving space.