How does an air ejector primarily function in a condensing system?

An air ejector functions primarily by utilizing the Venturi Effect, which is a principle in fluid dynamics. In a condensing system, air ejectors create a low-pressure area that facilitates the removal of air and non-condensable gases from the system.

When steam is passed through a restricted section of the air ejector, its velocity increases and its pressure decreases according to Bernoulli's principle. This drop in pressure produces a vacuum that draws in the unwanted air and gases from the system. Once these gases are removed, the system can operate more efficiently, allowing the steam to condense properly and maximizing heat transfer.

This operation is crucial because excess air can hinder the performance of the condensing system, reducing its overall efficiency. The use of the Venturi effect in this context enables effective removal of these gases, ensuring better performance and efficiency of the condensation process.