Which fluid is used to remove heat from the oil during cooling?

In the context of industrial refrigeration systems, a coolant is specifically designed to absorb and transfer heat away from one medium to another. In this scenario, the coolant is responsible for removing heat from the oil, which helps maintain operational efficiency and prevents excessive temperatures that could lead to system failures or reduced performance.

Coolants are typically formulated to have a high heat capacity, allowing them to effectively carry away thermal energy. They can also possess properties that enhance their performance, such as lower viscosity, which helps in efficient circulation through the cooling system. By utilizing a coolant, the heat is effectively transferred away from the oil, ensuring that it remains within acceptable temperature limits for optimal function.

In contrast, refrigerants are primarily used in the refrigeration cycle to absorb heat from the environment and expel it elsewhere, making them unsuitable for directly cooling oil. Oil cannot serve as a cooling medium for itself since it would not facilitate any heat transfer. Water, while often used in cooling applications, might not be as effective as a specially formulated coolant for this specific task due to potential issues such as corrosion or scale buildup in an oil system. Thus, the coolant emerges as the most appropriate choice for efficiently removing heat from the oil.