What is the primary purpose of a secondary coolant in an indirect refrigeration system?

The primary purpose of a secondary coolant in an indirect refrigeration system is to transfer heat. Secondary coolants, often fluids like brine or glycol, absorb heat from the environment or from the primary refrigerant and then carry that heat away to a heat exchanger or other cooling components. This function is essential for efficient temperature management within the system, as it allows for effective heat exchange without direct contact between the refrigerant and the product being cooled.

Using a secondary coolant provides flexibility in system design and operation, facilitating a more controlled and efficient cooling process. By transporting thermal energy effectively, it enables the refrigeration cycle to work more smoothly, enhancing overall system performance and reliability.