Research On Indoor Thermal Environment Optimization And Energy Saving Trabsformation Of Existing Residential Building Of In Hengyang City In Summer

Hengyang is a hot summer and cold winter area,In summer,the temperature is high and the humidity is high,which is a typical humid and hot climate,Resulting in poor indoor thermal comfort in non air-conditioned rooms,In order to improve indoor thermal comfort,reduce carbon emissions and meet people’s yearning for a better life,The existing houses in the urban area of Hengyang City are selected as the research object,Using the methods of field investigation,measured analysis and simulation verification,The optimization of indoor thermal environment and energy-saving transformation measures in summer are deeply studied.Firstly,a total of 916 houses of 66 existing residential buildings were selected from the four urban areas of Hengyang City for investigation to understand the basic building information of these houses(including completion time,building structure,house type area and floor location),building energy consumption information(residential power consumption and heat dissipation equipment)and residents’ living thermal feeling,Lay the foundation for the selection of measured samples.Secondly,the indoor thermal environment and power consumption of 11 typical houses were measured from July to September,Based on the measured results,the correlation between residential indoor thermal environment and building energy consumption in summer and residential completion time,structure type and floor location is analyzed:(1)The completion time affects its indoor thermal environment;(2)In the same residential building,the comfort of indoor thermal environment decreases with the increase of building floors;(3)In the same floor,the indoor thermal comfort of the house with frame structure is better than that of the house with brick concrete structure;(4)In summer,residential energy consumption is negatively correlated with indoor thermal comfort.Then the corresponding improvement measures are put forward,mainly including optimization strategies such as external wall insulation,roof insulation,indoor equipment transformation and upgrading,outdoor environment transformation and so on.Finally,two different envelope optimization schemes are proposed,Taking the residential building a in the family area of The University of South China as the research object,the optimization simulation analysis is carried out.The results show that: After the optimization of scheme I,the average maximum temperature of A1,A2 and A3 houses decreased by 1.7 ℃,1.5 ℃ and 2.9 ℃ respectively.After the optimization of scheme 2,it decreased by 1.8 ℃,2.0 ℃ and3.3 ℃ respectively,Comparing the total energy consumption of cooling from July to September,The energy saving after optimization of scheme I is 33.1%,and the energy saving after optimization of scheme II is 36.4%.It can be seen that the transformation of building envelope can effectively improve indoor thermal comfort in summer and reduce building energy consumption.On the basis of the overall optimization effect of the internal wall,Is found that it plays a small role in the overall energy saving,Therefore,in the actual engineering transformation,the optimization transformation of residential interior wall not be considered.