Packaged Air Conditioner

PACKAGED AIR CONDITIONER

• It is a bigger version of the window air conditioner.

• It has a higher cooling or heating capacity.

• It is usually able to cool an entire house or a commercial  building.

In other words, package air conditioner is a factory-assembled air-conditioning unit ready for installation. The unit may be mounted in a window, with an opening through a wall, or on the building roof. These units may serve individual room, a zone, or multiple zones.

Components

The important components of the packaged air conditioner units are

1. Compressor

2. Water cooled or air cooled condenser

3. Electrical panel

4. Thermostatic expansion valve

5. Air filter

Types

Depending on the type of the cooling system used, the packaged air conditioners are classified into two types:

(a) Packaged Air Conditioners with Water Cooled Condenser

(b) Packaged Air Conditioners with Air Cooled Condensers

Here, we discuss packaged Air conditioner, with water cooled condenser.

Construction

1. In this packaged air conditioner, the condenser is cooled by the water.

2. The condenser is of shell and tube type. The refrigerant is flowing along the tube side and the cooling water is flowing along the shell side as shown in fig. 2.10.

3. In this system with the packaged units with the water 918 Jer cooled condenser, the compressor is located at the bottom along with the condenser. The evaporator or the cooling coil is located above these components.

4. The water is supplied continuously for the functioning of the  air conditioning system

5. The air handling unit comprising of the centrifugal blower and the air filter is located above the cooling coil. The centrifugal blower has the capacity to handle large volume of air required for cooling a number of rooms.

6. From the top of the package air conditioners the duct 9dt te bcomes out that extends to the various rooms that are to be cool cooled.

Working

1. The evaporator fan suck the air from the room to be conditioned.

2. This air is passed through the refrigerant distribution units

3. The refrigerant picks up the heat from this air and cools it.

4. Now, the air is further cooled by compressing it with the help of the compressor.

5. This cool air is distributed to the room and thus the room is air conditioned.

6. The condensor of the refrigeration system is cooled by circulating the water.

Advantages of Package type Air Conditioner:

• Installation and assembly labour charges are less.

• Duct work is eliminated.

• Units can be started or stopped easily.

• Easy maintenance.

• Individual room control is possible.

• Failure of unit only affects one area, unlike the failure of central system, which affects entire building.

Disadvantages of Package type Air Conditioner:

• More noisy operation.

• Leakage problem.

• Vibrations are more as compared to other unitary systems