Baffles direct combustion gases to come in close contact with what?

The purpose of baffles in a boiler system is to enhance the efficiency of heat transfer by directing combustion gases toward the heating surface of the boiler. By doing so, baffles ensure that the hot gases make maximum contact with the surfaces that are responsible for heating the water or steam within the boiler. This increased contact improves the overall heat exchange process, allowing the system to operate more efficiently and effectively.

When the combustion gases pass over the boiler heating surface, they transfer their heat to the water or steam, which is essential for maintaining optimal boiler performance. The design and placement of baffles are critical in achieving the desired flow patterns, reducing dead spots, and ensuring that all areas of the heating surface are adequately utilized for heat transfer.

Other choices, while related to boiler systems, do not directly pertain to the function of baffles in directing combustion gases for efficient heat transfer.