Plate Heat exchanger

A sandwich of plastic or metal plates with interlaced air paths. 

Heat is transferred between airstreams from one side of the plate to  the other. 

The plates are typically spaced at 4 to 6mm apart. 

Can also be used to recover coolth. Heat recovery efficiency up to 70%.

With a plate heat exchanger, heat cuts through the surface and separates the hot medium from the cold. Thus, heating and cooling fluids and gases use minimal energy levels.

The theory of heat transfer between mediums and fluids happens when

• Heat is always transferred from a hot medium to a cold medium.
• There must always be a temperature difference between the mediums.
• The heat lost from the hot medium is equal to the amount of heat gained by the cold medium.

Advantages of plate heat exchanger

• Improved temperature approach, true counter-current flow, 80-90% less hold-up volume.
• Low capital investment, installation costs, limited maintenance and operating costs.
• Less fouling, stress, wear, and corrosion.
• Responsible least energy consumption for most process effect, reduced cleaning.
• Adjustable plates on existing frames.