COMPRESSOR OF CENTRIFUGAL WATER CHILLER

Compressor of Centrifugal Water Chiller

The vapor-compression refrigeration cycle in water chillers varies by the type of compressor used in it. As per the size of chillers, the following types of compressors are typically used:

Refrigeration Cycle of Centrifugal Chiller

What are the Refrigeration Principles?

1. Heat always moves from a warm area to a cooler area.

2. To cool an area, heat must be removed from it.

3. Heat can be removed from an area by evaporating a liquid, such as a refrigerant, or by compressing a gas to a liquid.

4. Heat transfer can be increased by increasing the temperature difference between the two areas.

5. To create a cooling effect, the temperature of an area must be lower than the temperature of the surrounding environment.

6. The efficiency of a refrigeration system depends on the type of refrigerant and the design of the system.

Fig: Refrigeration Cycle System Diagram for Centrifugal Chiller

What is the Refrigeration Cycle of a Centrifugal Chiller?

Fig: Sectional Diagram of Chiller Evaporator

What is Evaporator and How Does it Work in a Chiller

This weight drop of the fluid refrigerant the second development gadget to streak and the subsequent blend of fluid and vapour enter the low-weight council of the economizer. 

How Economizer Works in Centrifugal Chiller

Air-Side Economizer Flow Diagram

Economizer Working Principle in Centrifugal Chiller System

Economizers may use in air side or water side of the HVAC system. Let's see the use of economizer on a different side to save energy.

Expansion Device Orifice Plates of Centrifugal Water Chiller

Expansion Device Orifice Plates of Centrifugal Water Chiller

Fig: Orifice Plates Diagram

An expansion device is used to maintain the pressure difference between the high-pressure (condenser) and low-pressure (evaporator) sides of the refrigeration system, as established by the compressor. 

This pressure difference allows the evaporator temperature to be low enough for the refrigerant to absorb heat from the water being cooled, and the condenser temperature to be high enough for the refrigerant to reject heat to water at normally available temperatures. 

How Chiller Motor works for Long Time keeping Cool

Fig: Hermetic Motor  Cooling System

How Chiller Motor works for a Long Timekeeping Cool

How chiller motor keeps cooling is an important issue because chiller normally works continuously and need to keep cooling; so how chiller motor keeps cooling. 

A motor is used to rotate the impeller(s). A direct-drive motor is connected directly to the impeller shaft and the impeller rotates at the same speed as the motor. 

Why Purge System Is Required For Refrigerant and How Does It Operate in Chiller Compressor

Fig: Refrigerant Purging System Diagram

Why Purge System Is Required For Refrigerant and How Does It Operate in Chiller Compressor

Purge operation system for refrigerant in chiller compressor is carry-out to remove air and moisture; 

Condenser of Centrifugal Water Chiller

Cooling Water Flowing Diagram for Centrifugal Water Chiller

Condenser of Centrifugal Water Chiller

The high-pressure refrigerant vapor is discharged from the compressor into a heat exchanger that acts as a condenser. 

In a water-cooled condenser, water is pumped through the tubes of the shell and-tube heat exchanger while refrigerant vapor fills the shell space surrounding the tube bundle.