What is the typical function of a surge drum in refrigeration systems?

The typical function of a surge drum in refrigeration systems is to maintain a stable liquid level. This component plays a crucial role in ensuring that the liquid refrigerant is available in sufficient quantity for the system to operate efficiently. By maintaining a stable level, the surge drum helps to accommodate fluctuations in the system's operating conditions, such as variations in flow rates and changes in the refrigerant state. This prevents issues like flooding or starvation in downstream equipment, optimizing performance and reliability.

While surge drums can also contribute to phase separation between gas and liquid, their primary design and function focus on liquid level stabilization. Preventing hydraulic hammering and allowing for proper handling of phase changes may be part of their role, but the key aspect is ensuring there is enough liquid refrigerant available for the system to work effectively. In this context, liquid collection and pumping may also occur, but again, the fundamental purpose ties back to maintaining the liquid level.