Numerical Simulation Analysis Of Medical Atrium Building Environment

With the improvement of the economic development and people’s living conditions, construction began towards energy conservation, environmental protection and development of staff to meet the thermal comfort, etc., but the use of natural ventilation is one of the important technical measures. Use of natural ventilation to reduce the application of traditional air conditioning systems, thereby reducing energy consumption, reduce pollution, and physical and mental health of people for more favorable. In the over-season, you can take advantage of natural ventilation to reduce the indoor temperature and humidity, in order to better meet the requirements of indoor thermal comfort. The theory is based on natural ventilation and the use of air pressure inside the building of the outer surface of the building to produce hot air flow in the building carried ventilation. In the hot wind for natural ventilation pressure, it has been made a special formula derivation calculation and theoretical analysis. Although the use of this calculation and analysis methods to derive relatively simple and straightforward, but this approach has its limitations, such as:You can’t explain in detail the impact of building construction, the environment and the internal structure of the building and other factors on building ventilation. With the development of CFD technology, the use of numerical simulation methods, we can easily predict these factors, thereby reducing manpower and costs.In this paper, a total of five chapters, the first chapter introduces the main introduction research background, recalling the previous research in this field, clear the object of study, research purpose and meaning. The second chapter describes the theoretical basis of numerical simulation, CFD applications in the HVAC and dynamic aspects of the research, as well as in the field of HVAC CFD solution process. The third chapter includes outdoor and indoor environmental conditions, as well as research methods and mathematical model of the object. The fourth chapter describes the standard k-c turbulence model for incompressible flow CFD atrium building on two outdoor and indoor air flow simulation, contrast excessive mechanical ventilation and natural ventilation seasonal effects as well as a layer of two-story atrium and connected to three layer four connecting atrium impact on airflow. The fifth chapter is the conclusion to the previous two, three, four chapters of the findings, based on its evaluation.This article includes simulated outdoor environment on the front and back pressure caused by poor construction, which is the average pressure in the outdoor air flow generated on the surface of each window. And then calculate the average pressure of the various windows when the end of the outdoor environment simulation to provide natural ventilation to simulate the indoor boundary conditions. Indoor environment simulation is mainly for two parameters-the indoor wind speed and temperature:one story each area collection point temperature velocity distribution, the regional collection point four five temperature velocity distribution.The main purpose of this study is to compare the impact of airflow atrium produced over five seasons and four mechanical ventilation and natural ventilation effect and a layer of Layer2connections, in order to manage the building designers and future provide guidance to select the appropriate ventilation, building conservation in the indoor environment to meet the conditions required operating costs.