Slide 2:
Why ? to control temperature
to control humidity
dust free atmosphere
chemical fumes free air
Slide 3:
Types of Central A/C system Vapour compression system
OR DX type
Chilled water type
Slide 5:
Main components :-
Compressor -- Compresses low pressure refr gas (from AHU) to high pressure gas (to condensor)
Expansion Valve – Reduces pressure of liquid refr. by sudden expansion.
AHU – Exchange of heat betn. Low pressure liquid refr & air. The low press / low temp liq takes away heat and turns to low pressure gas.