Study On The Annual Distribution Characteristics Of Climate And Humidity In Anhui

The standard for the design requirements of building thermal zoning and envelope structure is to adapt to local conditions according to the requirements of local climatic characteristics,and the building thermal design requirements for different climatic characteristics are also different.The current thermal design code is based on the number of days for air conditioning heating and cooling.The main basis is that only the temperature characteristics are considered,and the influence of climatic humidity is not considered.Therefore,there is still no specific standard for the design of the building's moisture resistance,which causes the building to be affected seriously by moisture.The most common manifestation is the condensation on the inner surface of the envelope structure,which not only affects the performance of the building itself,such as the poor insulation performance The peeling and falling of the inner surface of the stucco layer affects the appearance,and even mildew breeds bacteria to affect human health and comfort.Aiming at the above-mentioned phenomena,this paper elaborates the dew condensation process mechanism in combination with the heat transfer characteristics of the building envelope,and studies the coupling with the outdoor meteorological characteristics(temperature,humidity).The typical meteorological year method is adopted for the past 30 years(1989 to 2018).Meteorological parameters are used as the basis of calculation.The annual distribution characteristics and changes of air humidity(relative humidity,absolute humidity)in typical cities of Anhui,Suzhou,Hefei,and Tunxi are analyzed.The inner surface of the building envelope under natural ventilation conditions in typical meteorological years.Condensation is a characteristic index for determination,and the dew condensation temperature base is defined.When the difference between outdoor day-to-day dry bulb temperature and dew point temperature is lower than the dew condensation temperature base,the cumulative value of the reciprocal of the difference is the humidity intensity value.The dew temperature base is 4 ° C;and the distribution characteristics of dew strength characteristics on the inner surface of building envelopes in typical cities in Anhui area are statistically compared and analyzed.The study shows that the dew strength and humidity duration of building dew in Suzhou,Hefei,and Tunxi are 43.35,respectively.d / ?,98 days,105.68 d / ?,154 d,124.29 d / ?,193 days,and seasonal changes overall.The comparison between the typical meteorological year and the natural meteorological year shows that the humid intensity in Suzhou,Hefei and Tunxi areas all showed a downward trend,with the decreasing values being 2.6%,3.4% and 2.7%,respectively,indicating that the climate in Anhui area has a tendency to be dry.Provide suggestions for the design of thermal engineering moisture-proof in Anhui region.Finally,based on the distribution of different climatic characteristics in the three regions,the annual load dynamic simulation of office buildings was performed using DEST software.The air-conditioning load in the three regions was compared and analyzed.The results show that typical cities in Anhui(Suzhou,Hefei),Tunxi)The types of office building load(indoor sensible heat,indoor latent heat,fresh air sensible heat,fresh air latent heat)accounted for 57%,7%,10%,and 26% respectively;53%,7%,10%,30%;56%,9%,11%,24%.Fresh air load accounts for 36%,40%,and 35%,respectively.Among them,the fresh air latent heat load is the largest in Hefei,indicating that the air is the wettest in the Hefei area during the air-conditioning period;the minimum fresh air latent heat load in the Tunxi area is the dry air in Suzhou and Hefei during the air-conditioning period.Statistical agreement with moisture intensity values.Figure [40] table [23] reference [54]...