Study On The Impact Of UHI Intensity On The Energy Consumption Of Building Air Conditioning In Guangzhou

In this paper,the influence of UHI effect on building energy consumption is studied by comparing the energy consumption of air conditioning energy in Guangzhou under different UHI.It can not only provide reference for alleviating UHI effect,energy forecasting and energy saving measures but also provide reference for the study of urban construction in other hot summer and warm winter areas.Firstly,the meteorological data of six automatic weather stations in Guangzhou were collected,and the characteristics of UHI were analyzed.The results show that the UHI effect in Guangzhou is obvious,and the UHI effect increases the frequency of high temperature and high temperature.In general,the intensity of summer UHI is larger than that of winter UHI,the maximum daily UHI strength is 4.73?,and the number of hours of UHI intensity is higher at 0?~4?.The maximum daily UHI intensity of five weather stations in winter is 3.77?,0?~2? UHI strength of the high number of hours.When the temperature is used for the static analysis of office building energy consumption,the total cooling load increases by about 5.27% and increases by 4.44 kWh /? for 1? increase of UHI at the base load of Guangzhou basic station.The total heat load is reduced by about 34.87%,down by 1.02 kWh /?.Secondly,the meteorological data of six weather stations were used to compile the meteorological documents for dynamic energy consumption simulation.The office and residential building models are designed by DeST according to our current building codes.The dynamic energy consumption of the air conditioning energy of the model building is calculated by the dynamic simulation.The influence of the UHI intensity on the energy consumption of the air conditioning in the office and residential buildings is analyzed.It is shown that the energy demand for cooling of office buildings increased about 10.20%/?(an increase of 6.69 kWh /?),and 13.72%/? for residential buildings(an increase of 7.74 kWh/?).The energy demand for heating of office buildings decreased about 19.52%/?(an decrease of 0.99 k Wh/?),and 23.98%/?(1.22 kWh/?)for residential buildings.Finally,the influence of UHI effect on the energy consumption of building air conditioning equipment is analyzed.(1)In summer,for office buildings,it is shown that the equipment energy consumption for cooling of VRV system increased about 8.90%/?,and 7.89%/? of the primary air fan-coil system.For residential buildings,the equipment energy consumption for cooling of split air conditioning equipment increased about 13.72%/?.(2)In winter,for office buildings,it is shown that the equipment energy consumption for heating of VRV system decreased about 14.76%/?,and 6.26%/? of the primary air fan-coil system.For residential buildings,the equipment energy consumption for heating of split air conditioning equipment decreased about 23.98%/?.In terms of the sensitivity of building energy consumption to UHI in Guangzhou,the impact of UHI on office buildings energy is more significant than residential buildings,the impact of UHI on buildings energy in summer is more significant than in winter,the impact of UHI on office buildings VRV system energy is more significant than split air conditioning equipment.