Analysis Of Natural Ventilation Potential In Hefei Area Based On Thermal Comfort Evaluation Model

With the development of economic,the energy crisis is increasingly serious.China’s building energy consumption accounts for about 35% of the total energy consumption of society,of which more than 50% loss in the heating ventilation and air conditioning reducing air conditioning energy consumption become more and more attention now.Natural ventilation is a key technology which use the natural resources in today’s construction industry to improve the thermal environment of buildings.Reasonable architectural design can maximize the use of local climate resources,fully tap the natural ventilation potential,to achieve low-carbon building design is of great significance.In this paper,the natural ventilation potential of Hefei area based on different thermal comfort evaluation is analyzed,and the office building is taken as an example to simulate and analyze.First of all,based on the Ⅰ,Ⅱ class thermal comfort requirement of human body,and the meteorological parameters of outdoor air in Hefei.statistics Hefei area outdoor air enthalpy,and statistics to meet the human body Ⅰ,Ⅱ level of thermal comfort requirements of the enthalpy value of the study of natural ventilation in Hefei potential.Secondly,based onthe adaptive thermal comfort model,combined with the outdoor meteorological data of Hefei area,the linear regression formula was used to calculate the thermal neutral temperature of natural ventilation in Hefei area,According to the acceptable thermal comfort zone of 80% and 90%,the statistical analysis of the temperature boundary of human body can be carried out.Based on the adaptive model,the comfortable area and pattern of natural ventilation in Hefei area are drawn.According to the principle of natural ventilation,the Hefei area office building under different indoor heat conditions to meet the natural ventilation requirements of the number of hours to calculate the cumulative natural ventilation can be used throughout the year to study the natural ventilation potential of Hefei.Finally,Using DeST to simulate and analyze the hourly indoor temperature and humidity of the typical typical office building in Hefei,and compare the simulated enthalpy frequency with the statistical enthalpy frequency value.The upper temperature limit of natural ventilation can tolerate the air conditioning as open boundary conditions,combined with the energy saving potential of typical office building project in Hefei area were analyzed,simulation of natural ventilation and mechanical ventilation and air conditioning energy consumption.