In indirect refrigerant systems, heat transfer fluids have two basic functions:
- To transfer the cold: the coolant in indirect cooling systems must remain fluid at all prevailing temperatures in the system, and the viscosity should preferably be as low as possible.
- To protect the system against corrosion: compared to other applications, corrosion protection at low temperatures requires a different set of inhibitors and a different protection mechanism. Our Zitrec© products are designed to offer maximum protection under all conditions.
Benefits of indirect refrigerant systems:
- Minimal amount of refrigerant
- Reduced risk of leakage of the primary refrigerant
- Reduced system size
- Less severe demands on piping and pumps
- Fewer legally mandatory maintenance and checking operations for smaller primary cooling circuits
- Simpler to modify, which makes it extremely attractive for production processes requiring flexibility
- Transporting refrigerant over a long distance is avoided, as the secondary fluid can easily be carried away from the system and cooled at a convenient distance
Examples of application areas:
- Indirect systems in supermarkets:
In supermarkets, the cold needs to be transported to a variety of fresh and frozen displays in an effective, safe and economical way. All the cooling effect required is produced in the machine room, far from the display cases, resulting in high flexibility and a reduced risk of leakage. A heat recovery system, also situated in the machine room, can provide heating for the supermarket when required. Consequently, the use of unwanted refrigerant such as ammonia in a public place is avoided, although it can still be used in the primary system.
Please see the related content on this page to find out which heat transfer fluids from Arteco’s product range can be used in indirect cooling systems.