Heat Exchanger

A heat exchanger transfers heat between two fluids at different temperatures without allowing them to come into direct contact. It is one of the key components in industrial heat pumps and many other process systems.

Heat exchangers are used in heating and cooling systems as well as industrial heat pumps. They enable the efficient use of heat, help reduce energy losses, and make waste heat available for productive use.

How does a heat exchanger work?

A heat exchanger transfers heat from a warmer fluid to a colder fluid. The two fluids flow separately through the heat exchanger, with one releasing heat and the other absorbing it. Depending on the design, the fluids may be arranged in parallel flow, counterflow, or crossflow configurations.

Types of heat exchangers

Different heat exchanger designs are used depending on the application. Some of the most common types include:

• Plate heat exchangers – compact and efficient, with a large heat transfer surface area.
• Shell-and-tube heat exchangers – robust and particularly well suited for high temperatures, high pressures, and high heat duties.

Heat exchangers in industrial heat pumps

In industrial heat pumps, heat exchangers perform different functions within the thermodynamic cycle. As evaporators, they absorb heat from a heat source. As condensers, they transfer the heat that has been raised to a higher temperature level to the process where it is needed.

Depending on the heat pump configuration, additional heat exchangers may be used, including recuperators for internal heat recovery, subcoolers for refrigerant subcooling, and intermediate heat exchangers in multistage systems. Heat exchanger selection and design depend on factors such as temperature, pressure, the fluids involved, and process requirements.