| China’s energy problem is more and more serious,people from all walks of life are trying to link the energy problem.The publication of the green campus evaluation standard has promoted the construction of green campus and made a great contribution to the reduction of campus energy consumption.However,with the improvement of people’s requirements for indoor thermal comfort,colleges and universities around the country have installed air conditioning systems or equipment as the main thermal and humidity control equipment in student dormitories,which plays an effective role in regulating room temperature and humidity and improving indoor thermal comfort.Although the air conditioning system or equipment improves the thermal comfort of the dormitory,the pursuit of thermal comfort is accompanied by the increase of energy consumption.Therefore,it is an urgent problem for building energy conservation workers to find a balance between the thermal comfort of student dormitory and energy saving.In order to find the way of high efficiency and energy saving,this paper,on the basis of summarizing the technical and theoretical research of building envelope renovation at home and abroad,takes the dormitory of a university in guangzhou as the object,and firstly studies the thermal environment of the dormitory and the building energy consumption by using the method of questionnaire survey and energy consumption data analysis.Then the external wall of the student dormitory was measured on the spot.Through the analysis of the test results,it was found that the thermal performance of the external wall of the student dormitory could not meet the requirements of the implementation rules of guangdong province on energy conservation design standards for public buildings.This paper puts forward the reconstruction plan of three-dimensional greening for the enclosure structure of student dormitory.Finally,the three-dimensional greening reconstruction performance of student dormitory envelope is simulated to obtain the effect of energy-saving reconstruction of three-dimensional greening.The energy consumption statistics of all student dormitories on the campus where the research object is located show that the per capita electricity consumption of students in 2018 is 887.54 kwh,which is relatively high.At the same time,the thermal environment of 853 students in the dormitory was investigated in winter and summer,and it was found that students were less satisfied with the thermal environment of the dormitory,especially in winter,70% of students thought the thermal environment of the dormitory was poor.In order to explore the technical scheme of improving the performance of dormitory enclosure structure,the wall of student dormitory was also tested.The thermal conductivity of the wall of student dormitory was measured as 1.97 W /m2·K on site,which could not meet the requirements of thermal design specification.In the end,The vertical greening with vine frame and the three-dimensional greening transformation plan with the roof greening with phlox caryophyllum were selected.Through simulation calculation,it is found that after the three-dimensional greening transformation,the maximum hourly cooling load of the building is reduced by 18.43%,and the total cooling consumption in the cooling period is reduced by7.6%.Exterior wall inner surface temperature by 2.05 ℃.The conclusion of this paper can be used for reference to improve the performance of campus dormitory enclosure in hot summer and warm winter.At the same time,it provides a reference for the design of the new campus student dormitory,and also plays a certain role in promoting the development of three-dimensional greening. |
PDF Full Text Request