Filter
Top Products
2 Chiller System Design and Control SYS-APM001-EN
Primary System Components
Figure 1. Typical vapor-compression chiller
Water-cooled chillers are typically installed indoors; air-cooled chillers are
typically installed outdoors—either on the roof or next to the building. In cold
climates, air-cooled chillers may have a remote evaporator inside the building
for freeze protection.
Chiller evaporator
The evaporator section of a water chiller is a shell-and-tube, refrigerant-to-
water heat exchanger. Depending on the chiller’s design, either the
refrigerant or the water is contained within the tubes.
• In a flooded shell-and-tube evaporator (Figure 2), cool, liquid refrigerant
at low pressure enters the distribution system inside the shell and moves
uniformly over the tubes, absorbing heat from warmer water that flows
through the tubes.
Figure 2. Flooded evaporator cut-away
Compressor
Condenser
Evaporator
Tube Bundle
Liquid Level
Sensor
Chilled
Water
Return
Liquid
Refrigerant
Refrigerant
Vapor
Chilled
Water
Supply