Influence Of Natural Ventilation On Energy Consumption Of Air Conditioning In Typical Office Space In Chongqing

With the development of the Internet,the number of small office space is increasing,and the office area mostly adopts the split air conditioning.To reduce the energy consumption of small office space air conditioning has become the focus of energy saving research in this type of office building.Related research has pointed out that personnel behavior is an important factor affecting the energy consumption of air conditioning in office buildings,including the switching habits of air conditioning and doors and windows,the setting temperature of air conditioning,and so on.Compared to the large office buildings with centralized air conditioning,the split air conditioning in the small office space is more flexible by personnel manipulation,and its energy consumption is more closely related to the behavior of the office staff.In many factors,the ventilation volume caused by office staff switching doors and windows affects the air conditioning energy consumption of this type of office area to a large extent.First of all,this paper selects several typical office buildings in Chongqing area,investigates the behavior of personnel in the office area,summarizes the switching habits of air conditioning and doors and windows,the setting temperature of air conditioning and so on,and analyzes the relationship between the personnel regulation and control line and the environmental impact factors according to the measurement of the indoor and outdoor thermal environment.Secondly,3 office areas with split air conditioning are selected,and the indoor thermal environment and air conditioning energy consumption are measured in summer,transition season and winter.According to the measured data,the rules of air conditioning operation in this type of office area,the indoor and outdoor temperature changes in different seasons are summarized,and the air space under different conditions is compared.The influence of different factors on the energy consumption of airconditioning is analyzed.It is found that the daily operating time of air conditioning in this type of office area is more stable,and the working day is about 8.5-9h.The setting temperature of air conditioning is usually 26-28 ? in summer.When the setting temperature is 26,27 and 28,the unit capacity of unit installed capacity of air conditioning unit is 1.2 kW·h,1.07 kW·h and 0.98 kW·h.respectively,and the temperature of air conditioning in winter is set usually at 23-25?,when the setting temperature is 26,27 and 28?,the unit time energy consumption per unit installed capacity of the air conditioning unit is 0.93 kW·h,1.05 kW·h and 1.13 kW·h,the greater the opening of the outer window,the greater the energy consumption value for the air conditioning.Thirdly,on the basis of the qualitative understanding of the influence of indoor natural ventilation on the energy consumption of air conditioning,the indoor natural ventilation is measured by the "tracer gas descent method",and the indoor environment and the energy consumption value of air conditioning are monitored at the same time.The ventilation volume is divided into three grades of I-III,corresponding to the air change times,respectively.0-2,2-4,> 4(sub /h),the corresponding relationship between ventilation grade and air conditioning energy consumption and indoor environment is obtained.The energy consumption per unit time of unit installed capacity of air conditioning unit for ventilation grade from I to III is 0.97,1.16,1.32 kW·h.respectively,ventilation volume is increased by one grade,air conditioning energy consumption is increased by 13~15%,ventilation grade is from I-The corresponding indoor and outdoor temperature differences are 13.1,11.5 and 7.8 degrees respectively.With the increase of ventilation level,the temperature difference between indoor and outdoor decreases.Finally,the DeST-c software is used to simulate the energy consumption of air conditioning under specific ventilation.The simulation results are compared with the measured results,and the reasons for the difference are analyzed,which will provide a reference for the energy saving research of the small office space.