Automation In Aircraft

Automation In Aircraft

ABSTRACT:

1) The cooling coils have wide range of applications in the field of refrigeration and air conditioning.

2) The cooling coils performance depend mainly on its maintenance

3) The optimum performance result depends on various factors such as velocity of the flow primary surface area, number of tubes, fins spacing etc.

4) The application also depends upon the number of rows of cooling coils.

5) The cooling coils used in condensers are normally used for heat rejection.

6) A fresh air application requires maximum 8 rows of the coils.

7) Variations in any of the design factor may also affect the performance of the coil.

Introduction:

The air cooling coil with direct expansion uses a thermostatic expansion valve and these coils are used in the majority of comfort air conditioning applications, mostly below 100 tons capacity. If we look at the basic refrigeration cycle and the part played by the evaporator, the function of an evaporator is to take the heat into the system from the surrounding atmosphere.

The refrigeration entering in the coil is a low pressure low temperature mixture of a saturated liquid and vapour. As refrigerant mixture gradually travels towards the outlet of the coil, the liquid while absorbing the heat gases converted in to vapour and at outlet the entire refrigerant is in the form of superheated gases.


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