What is the primary function of a heat exchanger?

The primary function of a heat exchanger is to transfer heat between fluids without allowing them to mix. This is crucial in various HVAC applications where efficient temperature regulation is required. Heat exchangers facilitate the transfer of thermal energy from one fluid to another; for instance, they can transfer heat from hot refrigerant to the air or water in a system, thereby improving energy efficiency and performance.

In many HVAC systems, the separation of the fluids maintains system integrity and safety, as it prevents the contamination or chemical reactions that could arise if the fluids were to mix. This function is vital in both heating and cooling systems, enabling proper temperature control across different components.

Although generating steam or cooling air can be part of a system's overall function, these processes do not define the central role of a heat exchanger. Similarly, humidification can occur in HVAC systems, but it is unrelated to the fundamental purpose of heat exchange, which centers on heat transfer between fluids.