Low Atmospheric Pressure

Low Atmospheric Pressure
After the plane took off and height of the land at least atmospheric pressure and the amount of oxygen in the air are very few, the pilot automatically the air pressure and send to inside the cabin be completely isolated to maintain this pressure shall have enough oxygen but the problem is that this compressed air a temperature slightly higher must therefore be adapted so we have air conditioning, cold or warm and nice.
 
Not only the work of the system cooling only, but to control the temperature and humidity inside the plane as well as the engine cooling and air.
 
Based on the recirculate the air inside the cabin air purification as well as on the coolant the instrument cluster and the prevention of the Turkish water on the windows.
 
Divided into the air-conditioning system in the aircraft to two types: 
 
The first type: Vapor-cycle air conditioning air conditioning using refrigerant
used this type often in small aircraft which is exactly like the user in vehicles. It consists in order from the suit,compressor) and intensive,condenser) and the reservoir(Reservoir) and the valve extends,expansion valve) and evaporator,evaporator) and closed circuit any after the completion of the cycle starts again. Turn Into Gas-to-liquid and liquid to gas during the session. And refrigerant is the so-called freon commercially.
 
The way the system:
start from the reservoir is based on compensating shortage if happened in the system with freon in liquid form, heads the valve stem lying on the spraying fluid through the filler opening very small fluid out of which in the form of droplets. The fluid is heading to the evaporator a group of twisted pipeline be before the fan. When pushing the fan air toward the evaporator process thermal exchange between air and coolant freon take the fluid temperature of the air turns to a gas air and take the cold freon heading to inside the cabin.
 
After that enters freon compressor to the pressure on and goes in the form of compressed gas but due to pressure and the temperature somewhat high therefore enters gas after that to the condenser which is facing the outside air where again the process of thermal exchange between freon outside air but on the contrary, the Gas cools turns to Cold fluid outside air is warmed up and expels abroad. Then return freon again to extend valve Chamber returned again.
 
The second type: Air-cycle air conditioning cooling air using
this type in the jet aircraft the system uses Bleed air from the compressor in the engine as it is well known that this air is pure and clean. Pass External air Ram air, which of course be cool to cool the primary heat exchanger which is a genuine NISSAN radiator cap in the process of exchange of thermal yen parties. We then under the pressure of the air through the compressor is us compressed air the air of this situation and the high pressure and heat and passing on this region also Ram Air this is called the Secondary heat exchanger where air temperature. And after that up air to the turbine based on reducing the pressure which reduces temperature by the turbine rotate the steering column connected between them and the compressor.
 
There is also another in the water separator is to isolate the moisture in the air because of hypothermia in order not to freeze this region as well as the delivery of the line of the ram air to the latter region in order to control the desired temperature after that combines the air from all units or Packs to the confused Mixing Maze and mixes with the user air abroad from the cabin air is distributed through ducts Channels of distribution for all parts of the main plane Zones .The Pilot individually controlled air temperature inside the cab up through the special control so there are preparing to read the temperature and the existence of sensitive inside the cab up to measure temperature and send data to the compartment.

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