A glycol chiller is a refrigeration system that circulates a mixture of water and propylene or ethylene glycol through external piping to provide cooling capacity for industrial processes, data centers, and specialized applications requiring remote cooling. The glycol solution prevents freezing in cold environments while enabling heat transfer across distance, making these systems ideal for operations where direct refrigerant lines are impractical. Glycol chillers operate with cooling capacities from 5 to 300 tons.
Technical Specifications and Operation
Standard glycol chillers maintain setpoint temperatures between 35°F and 55°F with temperature variance of ±1°F. The glycol solution concentration typically ranges from 25-50% by volume to balance freezing point depression with thermal conductivity. Systems operate at 3-8 bar pressure with flow rates of 2-6 gallons per minute per ton of cooling capacity and require careful maintenance of glycol inhibitor packages.
Applications and Maintenance Requirements
Glycol chillers serve data center cooling, pharmaceutical manufacturing, plastic molding, and laser systems requiring precise temperature stability. Installation costs range from $8,000-$40,000 depending on cooling capacity and configuration. Maintenance includes quarterly glycol analysis to verify inhibitor effectiveness, annual system flushing, and replacement of glycol solution every 5-7 years to prevent corrosion and ensure optimal heat transfer efficiency.