Research On The Synergistic Operation Of Natural Ventilation,Thermal Insulation And Hygroscopic Mortar And Air Carrying Energy Radiant Air-conditioning System

With the improvement of people’s living standard and the incr easing energy consumption,how to improve indoor thermal comfort and reduce energy consumption is a focus of current research in the field of HVAC.Natural ventilation can meet the needs of indoor ventilation without consuming energy.Thermal insulation an d hygroscopic mortar can adjust indoor relative humidity and save energy consumption.And air carrying energy radiant air-conditioning system(ACERS)has advantages such as better thermal comfort,energy saving.Therefore,this paper take s natural ventilation and thermal insulation and hygroscopic mortar as the research object,and study the synergistic operation of natural ventilation and thermal insulation and hygroscopic mortar and its effect on ACERS.The main research contents are as follows:First,Two experimental rooms of hygroscopic mortar room and ordinary mortar room were established,and the indoor thermal environment under the three cases of closing windows,air conditioning,and air conditioning with window opening(natural ventilation)were analyzed.The results show that,compared with the ordinary mortar room in the case of air conditioning,the temperature of ordinary mortar room in the case of air conditioner with open window(natural ventilation)is about 1°C lower,the relative humidity is about 5% lower,and the indoor temperature and humidity distribution is uneven.However,the temperature of the hygroscopic mortar room in the case of air conditioner with open window(natural ventilation)is not much different from that of the ordinary mortar room in the case of air conditioning,and the relative humidity is about 10% lower,and the indoor temperature and humidity distribution is relatively uniform.This shows that natural ventilation will have effects on the indoor thermal environment,and the thermal comfort cannot be guaranteed.The synergistic operation of natural ventilation and thermal insulation and hygroscopic mortar has little effect on indoor temperature,and the relative humidity is greatly reduced.The indoor thermal comfort is improved.The synergistic operation of natural ventilation and thermal insulation and hygroscopic mortar can further improve indoor thermal comfort,which has certain advantages in thermal comfort,convenience and energy saving.Then in order to make further use of natural ventilation,a method of controlling natural ventilation is proposed based on the basic theory of natural ventilation,that is,the basic theoretical opening adjustment method of windows for high-rise buildings.In high-rise buildings,the original windows installed on the wall are used for daylighting,and the window embedded in the windows is used for ventilation.The theoretical window opening area under the theoretical wind pressure and heat pressure is calculated by the derived formula for calculating the window opening area,so as to control the window opening by manual or automatic control device.This method provides a certain basis for the control of natural ventilation.Finally,the method of controlling natural ventilation is used to reasonably utilize the natural ventilation,and CFD simulation method is used to analyze the thermal environment of rooms with the ACERS in summer and winter in the three cases of closing windows,natural ventilation,synergistic operation of natural ventilation and thermal insulation and hygroscopic mortar.The results show that,it can ensure the indoor thermal comfort by using the ACERS.Natural ventilation can introduce fresh and clean outdoor air,but it cannot guarantee indoor thermal comfort and increase the risk of condensation.The synergistic operation of natural ventilation and thermal insulation and hygroscopic mortar can not only maintain the advantages of the ACERS,such as good comfort,good anti-condensation effect,but also greatly reduce the indoor relative humidity.It can further improve the comfort,energy saving and convenience.This provides a more energy-saving and convenient way to create a more comfortable indoor thermal environment.