Monitoring And Simulation Study On Indoor Thermal Comfort Of Passive Ultralow Energy Consumption Buildings In Zhengzhou City

With the rapid development of urbanization,people are paying more and more attention to the comfort and health of the indoor environment.At the same time,the passive building aimed at energy saving and comfort has been vigorously promoted in my country.This type of building focuses on reducing the energy consumption requirements of the building itself,making full use of renewable energy,and providing comfortable indoor environment with less energy consumption through the integration of active and passive technologies.However,the development of passive buildings in my country is still in the initial stage,and most of the research focuses on the qualitative and quantitative analysis in the preliminary planning and design stage of buildings and there is still a certain degree of deficiencies in the research on the thermal comfort of passive buildings.In view of this,the indoor thermal comfort of passive ultralow energy consumption buildings is deeply discussed in this paper.First of all,based on a large amount of literature analysis and theoretical research,this topic focuses on the passive ultra-low energy consumption buildings that have been actually in operation in Zhengzhou and tests the indoor air temperature,relative humidity,wind speed,black globe temperature and so on in three characteristic rooms of this building under different working conditions.Through the analysis of evaluation indicators such as PMV-PPD and uneven coefficient,it can be seen that the predicted thermal sensation of the three characteristic rooms is slightly cool under the condition of natural ventilation in transition season.Among them,the average temperature of the meeting room is higher than that of the other two rooms.Under the condition of cooling+ fan in summer high heat season,with the opening and closing of the fan,the air temperature at the height of Y=1.1m,humidity content and related non-uniformity coefficient of the office will change accordingly.Compared with high-grade wind speeds,the average PMV value of the room at mid-range wind speeds is closer to 0 and the probability that the PMV value belongs to Class I thermal comfort is greater under the condition of cooling in summer high humidity season.Secondly,during the transition season,high summer heat and summer high humidity season,many batches of comfort questionnaire survey were conducted on the indoor personnel of the building.Through the analysis of the survey results,the weighted average method is used to determine the basic data of the clothing thermal resistance and the metabolic rate of the personnel under the characteristics of each season.Finally,in order to further enhance the thermal comfort of the part of the working conditions,on the basis of the actual working condition,this topic studies by further simulation on the working condition of natural ventilation in transition seasons,the working condition of cooling + fan in summer high heat season and the working condition of cooling in summer high humidity season,including two window opening methods,three fan gears,and 9 kinds of simulation tests with the supply air temperature of 19℃,21℃,23℃ and the supply wind speed of 2m/s,3m/s,4m/s crossing.According to the analysis of simulation results,under the background of passive ultralow energy consumption buildings,the top-hung opening method of the outer window is better than the inner side-opening method of the outer window.Different fan gear has little influence on the overall indoor comfort of the office.The air supply parameters of 23℃and 2m/s are the best operating combination.On the basis of previous studies,this paper supplements the actual measur ement of the indoor comfort of passive ultra-low energy buildings under the cl imate characteristics of Zhengzhou,and uses questionnaires and uneven coeffici ents to analyze and evaluate the comfort of rooms with different characteristics.In addition,this paper simulates the comfort of the room under key working conditions,and proposes a strategy for improving the comfort,which can provi de a reference for the adjustment and control of the indoor comfort of passive buildings.