Freeze Protection Closed Loop Systems

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Various types and concentration of antifreeze like

• ethanol
• methanol
• propylene glycol
• ethylene glycol

can be used to freeze protect brines where the temperature in the fluids are below 0^oC (32^oF). Typical advantages and disadvantages for the freeze protection fluids are listed below.

Note! Check the related documents listed below for details.

Ethanol

• low corrosiveness
• high flammability (if pure)
• low toxicity
• high heat transfer capacity
• low pumping requiremens due to viscosity
• moderate cost

Methanol

• low corrosiveness
• high flammability (if pure)
• high toxicity
• high heat transfer capacity
• low pumping requiremens due to viscosity
• low cost

Propylene Glycol

• low corrosiveness
• low flammability
• low toxicity
• low heat transfer capacity
• high pumping requiremens due to viscosity
• high cost

Ethylene Glycol

• low corrosiveness
• low flammability
• high toxicity
• low heat transfer capacity
• high pumping requiremens due to viscosity
• high cost

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Related Topics

• Air Conditioning - Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort

Related Documents

• Calcium Chloride - Water - Freezing point, density, specific heat and dynamic viscosity of Calcium Chloride - Water coolant
• Comparing Ethylene Glycol and Propylene Glycol - Comparing the properties of ethylene glycol and propylene glycol
• Ethanol Freeze Protected Water Solutions - Freezing and flash points of ethanol based water solutions - brines
• Ethylene Glycol Heat-Transfer Fluid - Freezing point, viscosity, specific gravity and specific heat capacity of ethylene glycol based heat-transfer fluids, or brines
• Methanol - Thermophysical Properties - Thermophysical properties methanol
• Methanol Freeze Protected Heat-Transfer Fluids - Freezing and flash points of methanol or methyl based heat-transfer fluids - brines
• Propylene Glycol based Heat-Transfer Fluids - Freezing points of propylene glycol based heat-transfer fluids suitable for the food processing industry
• Sodium Chloride - Water - Freezing point, density, specific heat and dynamic viscosity of Sodium Chloride - Water coolant