Compact heat exchangers are used in a wide variety of applications. Typical among them are the heat exchangers used in air conditioning, beer and wort chilling, solar and geothermal systems, waste and process heat recovery. The need for light-weight, space-saving, and economical heat exchangers has driven the development of compact surfaces.
Specific characteristics of compact heat exchangers include the following:
- a high heat-transfer surface area per unit volume;
- fluids must be clean and relatively non-fouling because of relatively small flow passages and difficulty in cleaning;
- pressure drop consideration;
- operating pressures and temperatures are limited to a certain extent compared to shell and tube exchangers due to joining of the plates by brazing;
etc.
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