(1) For buildings with natural ventilation, the windward side should form an angle of 60 ~ 90 with the maximum wind direction in summer, and should not be less than 45. At the same time, we should consider the available spring and autumn monsoon direction and make full use of natural ventilation.
(2) Building layout should pay attention to favorable natural ventilation factors, such as staggered layout and oblique layout.
(3) Natural ventilation should adopt air inlet, air outlet or window sash with small resistance coefficient, low noise and easy operation and maintenance. Thermal insulation measures should also be considered for air inlets and air outlets in cold areas.
(4) For buildings with natural ventilation, the influence of hot pressing and wind pressure should be considered in the calculation of natural ventilation.
Extended data:
Relying on the wind pressure generated by the main ventilator for ventilation is called full wind pressure ventilation, also known as full wind pressure ventilation. The mine adopts full wind pressure ventilation, and the wind pressure values distributed in different sections of the system are different.
When the mine develops or prepares the mining area, the ventilation design must be carried out according to the total wind pressure and air supply volume; Wind guide facilities (wind walls, etc.) should also be used in some areas. ) Adopt full wind pressure ventilation as far as possible. If the air volume is large and the roadway is long, local ventilation is needed.
Tunneling ventilation refers to ventilation with local ventilator in order to dilute and discharge harmful gases, mine dust and gun smoke and create a good meteorological environment when digging wells and lanes.
With the local ventilator as the power, through the local ventilation mode of air duct steering flow, it can be divided into pressure-in, extraction and mixed type. Forced ventilation has the advantages of good safety, large effective range and strong smoke exhaust ability, and flexible air duct can be used, but blasting smoke pollutes the roadway, which leads to the decline of labor hygiene conditions. Due to confluence, the effective suction range of extraction type is short, and the smoke exhaust ability is weak, so only rigid air duct can be used, which has little influence on roadway pollution. Mixed ventilation is often used in long roadway excavation.
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