Study On Regularized Intermittent Heating Load Characteristics Of Primary And Middle Schools In Northwest China

At present,winter heating in northern China is dominated by central heating and decentralized heating,and most of the residential buildings continue to have stable heating modes.The construction of primary and secondary schools is different from the continuous operation of heating buildings.It is in non-use period during the coldest hours such as nighttime and winter vacation.In order to save building heating energy,intermittent heating mode should be adopted.At present,although the primary and secondary schools in some areas have adopted intermittent operation mode,they still use the continuous heating heat load calculation method,and only start and stop intermittently in time.Different from the random intermittent heating method,the use of functional buildings in classrooms,dormitories,and libraries in primary and secondary schools is relatively fixed,which reflects the characteristics of regular,medium,and long-term regularization within the day,week,and year.Therefore,according to the actual use rules of primary and secondary schools,to fully realize the intermittent heating and thermal environment adjustment of primary and secondary schools,it is necessary to accurately grasp the regularized intermittent heating load characteristics of primary and secondary schools.This paper takes the primary and secondary schools in Northwest China as the object,adopts the methods of investigation and analysis,numerical calculation,data induction,etc.,firstly investigates and analyzes the building combination mode and thermal environment characteristics of a large number of primary and middle schools in Northwest China,and extracts the campus layout pattern of typical primary and middle schools in Northwest China.It mainly includes teaching buildings,dormitory buildings,canteens,office buildings,etc.;furthermore,simulation analysis is carried out for different heat storage performance teaching buildings and different preheating time conditions,and the preheating load characteristics of various types of teaching buildings are obtained.In addition,for the functional buildings of classrooms,dormitories,canteens,office buildings and other primary and secondary schools,simulation analysis is carried out in the short-term,medium-term and long-term intermittent modes,and the intermittent thermal negative characteristics of each room are mastered.According to the actual use characteristics and load rules of each function room of each teaching building,the superheat analysis is carried out to obtain the thermal load characteristics of the whole building.Finally,according to the characteristics of the campus building group,the thermal load of each functional building is coupled and superimposed.Regularized intermittent heating load characteristics in primary and secondary schools.This study realized a step-by-step simulation overlay analysis from preheating load-room load-building load-campus load,and taking the primary and secondary schools in typical northwest cities such as Xi’an,Xining and Lanzhou as the specific targets.The result can be similar to the primary and secondary schools in the northwest.Provides basis for heating design and operation adjustment.