Water Cooled Chiller System - Complete Piping & Working Guide

Water Cooled Chiller System - Complete Piping & Working Guide

Understanding a Water Cooled Chiller System is essential for every HVAC & MEP engineer involved in commercial, industrial, airport, hospital, and data center projects.

This diagram clearly explains the complete flow between:

• Cooling Tower
• Chiller
• Chilled Water Pumps
• Condenser Water Pumps
• Heat Exchanger
• Flow & Temperature Monitoring Devices

◆ How the System Works:

• Chilled Water Supply (CHWS) at 6-7°C is circulated to the building/process load.
• Heat from the space is absorbed and returns as CHWR at 12-15°C.
• The chiller evaporator removes heat from the chilled water loop.
• Heat is transferred to the condenser water circuit.
• Cooling tower rejects unwanted heat to the atmosphere.
• Cooled condenser water returns back to the chiller for continuous operation.

◆ Key Engineering Points:

• Water-cooled chillers provide higher efficiency compared to air-cooled systems.
• Proper ΔT (temperature difference) is critical for energy performance.
• Flow switches protect equipment from low-flow conditions.
• Strainers prevent dirt and debris from damaging heat exchangers.
• Correct pump balancing improves system stability and efficiency.
• Cooling tower performance directly affects chiller power consumption.

Typical Operating Temperatures:

• CHWS: 6-7°C
• TEMPERATURE: 12-15°C
• CWS: 30-35°C
• CWR: 35-40°C

* In HVAC systems, efficient heat transfer and proper water flow management are the keys to energy savings and reliable operation.