Freeze Protection of Water based Heat Transfer Fluids

Ethanol

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

Methanol

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

Propylene Glycol

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

Ethylene Glycol

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

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