2. Heat transfer liquids

Heat transfer fluids are gases or liquids that transfer thermal energy in indirect cooling or heating systems. They are typically confined in a closed circuit and often pumped in continuous cycles.

Water is the most frequently used heat transfer fluid where temperature ranges between 0°C and 100°C are sufficient. However the use of water as a heat transfer liquid is limited by its freezing and evaporation points for temperature ranges below 0°C or above 100°C.

Non-water heat tranfer fluids commonly have a high boiling point and the ability to hold and transfer thermal energy efficiently. Food grade heat transfer liquids are those, which are safe even if they incidentily get in contact with food. They are called HT1 heat transfer liquids.

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