What is flowing through the tubes in a baffled shell and tube exchanger?

In a baffled shell and tube heat exchanger, the primary function is to facilitate heat transfer between two fluids. The fluid flowing through the tubes can vary based on the design and application of the heat exchanger. In many applications, particularly in refrigeration cycles, it's common for ammonia refrigerant to flow through the tubes. The design allows for efficient heat exchange as ammonia can absorb heat effectively due to its thermodynamic properties.

The baffling in the shell enhances fluid dynamics and helps to direct the flow of the shell-side fluid, maximizing the surface area for heat transfer and promoting better mixing, which increases the overall efficiency of the heat exchanger. This is particularly important in applications where refrigerants, like ammonia, are used, as it ensures they can efficiently transfer their heat load.

Other options may not accurately describe the typical purpose and operation of a baffled shell and tube exchanger in the context where ammonia is often employed as a refrigerant, indicating a specialized usage that is crucial for efficiencies in the refrigeration cycle. Understanding these principles is key for anyone operating or studying heat exchanger systems.