Research On The New Way Of Natural Ventilation Of Tower High-rise Residence In Changsha Area

Natural ventilation technology is not only beneficial to energy conservation and environmental protection,but also can improve indoor air quality and indoor environment,which is worth popularizing.Tower high-rise residential buildings account for a large proportion in China,especially in recent years,land intensive is more and more serious,land prices continue to rise,urban population is larger and larger,more and more tower high-rise residential buildings have emerged.At present,the natural ventilation effect of most tower high-rise residential buildings is poor,and tower high-rise residential buildings lack suitable natural ventilation mode,which will not only increase the energy consumption of tower high-rise residential buildings,but also reduce the indoor air quality.Therefore,how to effectively apply natural ventilation technology to tower high-rise residential buildings is an urgent problem.In order to solve this problem,this paper first studies the natural environment,social environment and the types of tower high-rise residential buildings in Changsha area,and simulates and analyzes the ventilation status of tower high-rise residential buildings through CFD software,so as to find the reason for their poor natural ventilation.Then based on the Venturi effect,this paper proposes a new way of natural ventilation and a new type of assembled air duct.According to the actual situation,this paper proposes a method of installing the air duct in the tower high-rise residential buildings with poor ventilation effect.Then through the contrast method,it shows the difference of ventilation effect before and after using the new way of natural ventilation in the same tower high-rise residential building,so as to show the effectiveness of the new way of natural ventilation.In addition,the ventilation effect of the new natural ventilation method is affected by many factors,which factors will affect the ventilation effect of the new method,and what kind of air duct can achieve the best ventilation effect.In this paper,the air duct is optimized by many CFD simulation experiments.Then,using the data of the best ventilation effect,calculate the ventilation volume and ventilation times of the typical room,and calculate the ventilation volume and ventilation times of the room before using the new natural ventilation mode.Compare the calculated value with the relevant standards at home and abroad,to further explain the natural ventilation effect of the optimized air duct.Finally,evaluating the economic value of the assembled air duct by estimating its payback period.This paper proposes a new way of natural ventilation for tower high-rise residential buildings,its effectiveness is illustrated by theoretical derivation,simulation,comparative analysis and numerical calculation.This paper puts forward the assembled air duct and itsspecific application,precautions and optimization methods.The new way of natural ventilation with assembled air duct can effectively improve the natural ventilation effect of tower high-rise residential buildings and improve the application rate of natural ventilation technology in tower high-rise residential buildings.In addition,the new way of natural ventilation can also be extended and applied to other types of buildings with poor natural ventilation effect.The research results of this paper can provide some suggestions and help for the follow-up popularization and research.