Which type of baffles help guide gases through a boiler?

The correct type of baffles that help guide gases through a boiler are cross baffles. Cross baffles are specifically designed to create turbulence and promote better mixing of gases as they travel through the boiler. This mixing is crucial for enhancing heat transfer efficiency and ensuring that the combustion gases flow evenly throughout the heat exchanger surfaces.

In the context of a boiler, the flow path of gases is important for optimizing performance and efficiency. Cross baffles create a more controlled pathway, helping to redirect and distribute the gases, thereby preventing hot spots and ensuring that the heat is transferred more effectively to the water or steam being produced.

Other types of baffles, such as support baffles, primarily provide structural support and stability and do not significantly influence the gas flow direction. Flow baffles, while they may assist in directing flow, do not offer the same strategic turbulence effects as cross baffles. Static baffles may refer to baffles that do not aid in flow guidance at all, focusing instead on maintaining structural integrity or spacing within the boiler design. Thus, cross baffles are specifically beneficial for guiding gases and improving overall boiler efficiency.