Preventive maintenance of MEP Equipment

How Chillers Work and Types

Introduction

Chillers are essential components in HVAC systems that provide cooling by removing heat from a liquid via a vapor-compression, absorption refrigeration cycle, or other processes. Understanding how chillers work and the different types available is crucial for efficient cooling in various applications.

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How Chillers Work

Chillers work by circulating refrigerant or water through a system that absorbs heat from a building or process. The chilled liquid is then circulated through coils or other means to cool air or equipment. Key components include compressors, condensers, evaporators, and expansion valves.

Types of Chillers

Air-Cooled Chillers: Use air to remove heat from refrigerant coils.
Water-Cooled Chillers: Use water to remove heat from refrigerant coils.
Screw Chillers: Use screw compressors for efficient cooling.
Centrifugal Chillers: Use centrifugal compressors for large-scale cooling.
Scroll Chillers: Use scroll compressors for quieter operation and smaller capacities.
Absorption Chillers: Use heat energy (steam or hot water) to drive the cooling process.
Reciprocating Chillers: Use reciprocating compressors for smaller applications.

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