What limits the flow through the recirculation line in the cooling system?

The recirculation line in a cooling system is often limited by an orifice, which is a device designed to control the flow rate of the fluid passing through it. An orifice creates a specific diameter or opening that restricts the amount of fluid that can flow based on the pressure differential across it. By doing so, it helps maintain a controlled flow rate and is particularly useful in applications where precise flow control is essential for optimal system performance.

The orifice can influence factors such as the temperature distribution throughout the system, ensuring that the cooling fluid moves effectively and efficiently. In cooling systems, maintaining the right flow is crucial, as it allows for effective heat transfer and prevents overheating of components.

While valves can also control flow and pumps provide the necessary pressure to move fluids, they are not specifically designed to limit flow in the same way an orifice does. Filters, on the other hand, are meant to remove particulates and contaminants from the fluid rather than regulate flow. Therefore, the orifice stands out as the most direct means of limiting flow in the context mentioned.