车库排烟口与排风口的设计

发布人：http://www.sftfgd.com   发布时间：2017-05-25 16:33:52

由于烟气密度比常温空气密度小，所以排烟口布置在车库上方较合适。原因有四点

Because the smoke density is lower than the normal temperature air density, the smoke exhaust port is arranged above the garage. There are four reasons

1、汽车有害物的大部分，其中包括，一氧化碳的98%-99%，碳氢化合物的55%-65%和氮氧化物的98%-99%都是从尾气散发出来的，而尾气的排放温度高达500-550摄氏度，高温的排风气流产生很大的浮力，很难设想尾气会带留在车库下部。

1, the car most of the harmful substances, including carbon monoxide, 98%-99%, hydrocarbons and nitrogen oxides 55%-65% 98%-99% is emitted from the exhaust, and the exhaust temperature up to 500-550 degrees Celsius, the high temperature exhaust airflow has great buoyancy, it is difficult to imagine in the garage with lower exhaust.

2、还有部分污染物从曲轴箱排除，有10%-20%d 碳氢化合物从燃油系统排出，这两部分排放物虽然温度不像尾气那么高，且氮氧化物也比空气密度大些，但这些有害是在发动机工作时才排放的，而发动机工作时，汽车处于行驶状态，车库的气流就随着车子进进出出处于强烈扰动与混合状态，尾气也处于汽车后部的涡流之中，所以排放物并不会沉积于车库下方，而那些停稳放好的汽车，其发动机已经关闭，没有什么有害物排出了。

2, there are some pollutant removal from the crankcase, 10%-20%d hydrocarbons discharged from the fuel system, the two part temperature exhaust emissions although not so high, and nitrogen oxides than air density is bigger, but these are only harmful emissions during operation of the engine, and the engine when the car is in the running state. The air of the car into the garage and originated in the strong disturbance and mixed state, also in the vortex on the back of a car exhaust emissions, so not deposited in the garage below, while those who stop on a good car, the engine has been closed, not what the discharge of harmful substance.

3、有数据证明，用通风换气的办法将汽车排出的CO稀释到容许浓度时 有害物远远低于他们相应的允许浓度。

3. Data show that when ventilation is used to dilute the CO emitted to the permissible concentration, the harmful substances are much lower than their corresponding allowable concentrations.

4、高层建筑的地下车库，一般只停放轿车、多是面包车设计的，车库只有2.2-2.8M左右，将通风管道口布置在车库上部，则系统既能满足火灾时的排烟要求，也能满足日常排风的要求。

4, high-rise building underground garage, parking cars, only is the largest van design of the garage is only about 2.2-2.8M, the ventilation pipe opening is arranged on the upper garage, the system can meet the requirements of fire smoke, can meet the daily requirements of air exhaust.