Research On The Impact Of Fan Ventilation Mode On Indoor Airflow Organization

Residence is the place where people daily live and work, and its interior environment has always been close concern for a government and people. With the spread of building energy-saving thought, residential closure is getting better and better, but natural ventilation and household air-conditioner is becoming increasingly unable to meet residents'requirements of air quality, And reasonable airflow organization is to realize the indoor thermal wet environment and ensure the important link of indoor air quality. In order to make indoor air fresh, general house of room is usually adopts exhaust fan to ventilation, however, owing to the suction range and ventilation time of exhaust fan, ventilation effect is not very well. Thus, this paper basis on the traditional ventilation fan's exhaust ways, introduced pressed and press-exhaust ways and contrast analyzed to indoor airflow organization.This paper selects a graduate room of Energy and Safety Engineering Institute of Hunan University of Science and Technology for research, combine with building environment, fluid mechanics and other theory, research on the influence of three kinds of ventilation to indoor airflow organization.1. The research content: Based on ventilation and air distribution, simulation analysis the influence of indoor airflow organization on different ways in the air field, pressure field and wind Angle, and use the actual measurement methods to verify the correctness of the simulation results.2. The research methods: Based on theoretical analysis, combine the method of calculation simulation software simulation and experimental test.3. Major achievements:(1) In theory, pressed ways have a long range, and have a big influence of space airflow; exhaust ways have a small suction range and have a small influence of space airflow. Through this paper analysis, numerical simulation results agree with the theory. (2) Changing initial speed of the simulation shows that, when the initial speed is 4m/s, ventilating fan on indoor air impact is bigger and ventilation effect is better.(3) Changing fresh air supply ways (pressed ways, exhaust ways and press-exhaust ways) shows that, when press-exhaust ways is the condition of unilateral press-exhaust, pressed ways on indoor air impact is bigger and ventilation effect is better.(4) Pressed into the fresh air supply way is the type of organized supply, and have certain targeted, can improve air quality in work area; But exhaust fresh air is not the type of organized supply, and air fresh of entering indoor is less, feeling air fresh is not clear.