AIR CONDITIONING SHOP

NE Railway Workshop Gorakhpur Summer Training

In this shop, repairing and preventive maintenance of A.C, coaches is done. This shop has following sections:-

Ø  Compressor section

Ø  Alternator section

Ø  Alternator testing section

Ø  Battery section

Ø  Evaporator & condenser repairing section

Ø  R/R panel repairing section

COMFORT ZONE PARAMETERS:

Comfort Temperature:

For summer and winter seasons following are the comfort temperatures:

	Summer(cooling)	Winter(heating)
Low	22C	17C
Medium	24C	19C
High	26C	21C

Fresh air Inlet:

                  0.35 cubic meter/min/coach filtered through poly ethylene fine net.

                  If smoking is allowed then 0.75 cubic meter/min/coach.

Velocity of Air:

0.1  m/sec to 0.2 m/sec or 6m/min to 12 m/min.

Humidity:

It should be in between 40% to 60%.

PRINCIPLE OF AIR CONDITIONING:

It works on principle of refrigeration cycle.

Refrigeration cycle

It has following components:-

Compressor: It sucks vapor refrigerant at LT/LP from evaporator and after compressing sends to condenser at HT/HP.

Condenser: It colds HT/HP and changes vapour refrigerant into liquid.

Expansion Valve: It decreases the pressure of liquid refrigerant and also controls the flow of liquid.

Evaporator: Here liquid refrigerant takes the heat from outside and makes the environment cool. Now the liquid refrigerant is changed into vapour and again sends to compressor. This cycle is repeated again & again and cooled air is obtained continuously.