Glycol Refrigerant Systems

What If ?

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How would global warming and our ozone layer really be affected if all of the food retail stores in North America changed to sustainable refrigeration?

Specialists in glycol refrigeration engineering for commercial and industrial applications. We have extensive experience in the design, maintenance and repair of secondary glycol refrigeration systems.

Glycol Refrigeration

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Conventional Direct Expansion Refrigeration

Whilst glycol refrigeration systems have been used for some time, recent changes to refrigerant pricing, environmental concerns and commitment to sustainable refrigeration approaches has seen the popularity and benefits of glycol refrigeration systems increase significantly. Glycol is a totally food safe, nonhazardous liquid which is mixed with tap water, chilled in a glycol chiller unit and pumped around a closed loop to all refrigerated spaces and processes (cool rooms, fridges, process coolers etc).

For more information, please visit Glycol Solution for Chillers.

The equipment and plant design

A conventional direct expansion system includes a condensing unit usually located externally to the remote refrigerated spaces (cool rooms, fridges, etc.). The condensing unit rejects heat from the refrigerant and circulates refrigerant to all of the refrigerated spaces. When the refrigerated space requires cooling a digital temperature control instructs a solenoid valve to open which allows for liquid refrigerant to flow into the evaporator and start the direct expansion cooling process.

A glycol refrigeration system is made up of 2 sub-systems often referred to as a secondary loop system. Stage 1 of the system is a direct expansion system which chills the liquid glycol utilised in stage 2 of the process. The chilled glycol is then pumped to all refrigerated spaces and processes. When the refrigerated space requires cooling a digital temperature control instructs a glycol flow valve to open which allows chilled glycol to flow through the evaporator and start the cooling process.

The benefits of glycol refrigeration systems