OKANT & K
Kelvion air cooler in a unique system for food production. One of Russia’s leading meat producers needed to create a non-standard technical solution for a new integrated roasted pancake production line.
Kelvion’s partner OKANT & K, which specializes in supplying new technologies to the food industry, devised a unique system – a dual-mode freezing and cooling chamber. Both temperature modes could run alternatively with just a heat exchange unit. However, there was the added complexity of the need to use CO2 with a boiling point of -40⁰ C as the main refrigerant.
Collaboration between the two companies’ design teams resulted in selecting a Kelvion two-circuit air cooler with a glycol line placed parallel with the CO2 circuit. The low viscosity propylene glycol solution of the HNT-SNV brand was chosen as an additional coolant. As this refrigerant does not crystallize at extremely low ambient temperatures, the glycol circuit can be used to solve another problem - defrosting the unit.
Variable fin pitch
The working conditions for the air cooler involve continuous cooling and freezing of the hot pancake rolls – the temperature of the chamber inlet is 45⁰C - 60⁰C. To increase operational performance time without defrosting, the heat exchange unit was designed with a variable fin pitch. Special consideration was given to the choice of fin material to combat the corrosive nature of the various pancake fillings, including forcemeat, cheese and fruit.
The dual-mode freezing and cooling chamber with Kelvion air cooler passed all tests and is operating successfully.