Research On The Law Of Air-conditioning Use And Energy Consumption Characteristics Of Residential Buildings In The Yangtze River Basin

The energy consumption of air-conditioning in residential buildings is increasing year by year,forcing the reduction of air-conditioning energy consumption in residential buildings to become the focus of building energy conservation.The prerequisite for reducing air-conditioning energy consumption is to fully understand the characteristics of air-conditioning energy consumption.However,due to differences in economic conditions,climatic conditions,building forms,equipment forms,etc.,residential building air-conditioning energy consumption varies among different regions.Therefore,exploring the factors affecting energy consumption of different equipment forms and quantifying the characteristics of air-conditioning energy consumption is a very meaningful study for guiding residential energy conservation.In this paper,starting from outdoor weather conditions,indoor energy consumption behavior,heating and air-conditioning equipment,and enclosure structure,the current status and progress of research on air-conditioning energy consumption at home and abroad are reviewed.Based on the existing problems in the current research,it is clear that this paper uses a combination of theoretical analysis,field measurement and numerical simulation,and the research content of this paper is determined.The form and performance of air-conditioning systems in residential buildings in the Yangtze River Basin have been investigated.Through long-term monitoring of indoor thermal environment and air-conditioning energy consumption,the airconditioning energy consumption behavior of monitored residents in the Yangtze River Basin has been summarized,including indoor temperature,daily operating hours,and daily operating hours.The distribution of air-conditioning time period,the number of days that the air-conditioning is turned on,and the date distribution of the airconditioning in the cooling/hot season.In addition,the operating characteristics of radiant air conditioners and split air conditioners were compared through field measurements.Based on the comparison of the two operating characteristics,it is determined that only continuous operating conditions and constant temperature operating conditions of radiant air-conditioning are considered in the follow-up research of this paper.Next,sort out the factors affecting air-conditioning energy consumption,combined with the actual measurement data to determine the range of different airconditioning energy consumption factors,and use numerical simulation to analyze the law of influence of each factor on energy consumption within the range of level values.The factors that have a significant impact on air conditioning energy consumption within the value range are screened out,and the influence trend of each factor on energy consumption is obtained.The results show that indoor energy consumption behavior,equipment energy efficiency,air tightness,and outdoor weather conditions have the most significant effects on energy consumption,and the relationship between the first three and energy consumption is approximately linear.In view of the wall-mounted and cabinet-type air conditioners that are widely used in the Yangtze River Basin,in-depth research has been carried out on the energy efficiency of equipment,one of the factors affecting its energy consumption.First,it analyzes the essential reasons that affect the regional differences in equipment calibration energy efficiency,that is,the regional differences in meteorological conditions.Then,based on the typical year meteorological data of 32 provinces and autonomous regions across the country,statistics were made to obtain the temperature occurrence time of each city in the cooling season and heating season,and the climatic conditions were classified and classified by the method of cluster analysis.Finally,based on the classification results,a correction method for equipment calibration energy efficiency is proposed.This method is used as a method for determining the correction energy efficiency of wall-mounted and cabinet air conditioners in different climate zones.Combining the determined influencing factors of energy consumption and the values of each factor at different levels,the Energy Plus energy consumption simulation software is used to calculate the energy consumption values of the cooling season and heating season in a total of 18,180 cases in the three cities.Through a large number of cases,the energy consumption characteristics of air-conditioning in different cities are summarized.In addition,in order to describe the characteristics of air-conditioning energy consumption more comprehensively,this paper uses a multiple regression method to fit the multiple regression equations between the cooling and heating season energy consumption and various factors in Chongqing,Wuhan,and Wuhu.Finally,based on the characteristics of air-conditioning energy consumption,the airconditioning energy consumption forecast is simplified,and the value interval of each factor and the coordination relationship between the factors are determined according to the predicted energy consumption range.