| With the continuous development of China’s economy,high-rise buildings have sprung up and super high-rise buildings represent the prosperity of the urban economy,and creating a healthy,comfortable,economical and energy-saving indoor environment is an important topic for designers to study and has important economic and social significance.Air conditioning and ventilation design is a difficult point in the design of super high-rise buildings.If the system design is unreasonable,it will lead to a series of problems such as room temperature adjustment that cannot meet the needs of use,high energy consumption of the air conditioning system,and excessive noise.According to statistics,the energy consumption of the HVAC system of super high-rise buildings accounts for about 1/3 of the total energy consumption.In order to achieve the strategic goal of sustainable development and achieve the purpose of energy saving.The design of the HVAC system should reduce energy consumption as much as possible,allocate and use energy reasonably,and reduce pollutant emissions as much as possible.Due to the advantages of Variable Air Volume(VAV),such as high flexibility,high air quality,and high energy saving,it has been widely used in China in recent years.Compared with the traditional constant volume air conditioning system,the working principle of VAV is to achieve people’s requirements for the use of temperature and humidity in different rooms by changing the air supply volume of the air-conditioned room.However,its application in domestic buildings has been limited,owing to the high control requirements of Variable Air Volume(VAV).Based on reading many research documents,this thesis mainly introduces and researches the variable air volume system of super high-rise buildings.Starting from the domestic and foreign situations,analyzes the development and application of Variable Air Volume(VAV)at home and abroad,and puts forward the research content and methods of this thesis;briefly introduces the fundamental of the variable air volume system,starting from specific projects,through the calculation and analysis of the PMV value,the depth of the outer zone of the air-conditioning system is determined,a calculation method for the inner and outer zones of the air conditioner is proposed,which explains the necessity of dividing the inner and outer zones of the air-conditioning system.This paper analyzes the influence of indoor parameters on the load through load calculation of specific super high-rise projects,so as to determine reasonable indoor parameters.It determines the load borne by the air-conditioning system in the inner and outer zones,through the load analysis of the inner and outer zones,finally determining the zoning scheme of the air-conditioning system.This thesis determines the air conditioning system form of the research building by comparison of variable air volume system(VAV)with other air-conditioning systems.This paper puts forward the problems encountered in the actual operation of the variable air volume system(VAV)through the operation and debugging of the actual project,determines the optimal position of the static pressure point in the system,and finally gives a solution strategy.The energy-saving characteristics of variable air volume system(VAV)are explained through energy consumption analysis of variable air volume system(VAV). |
