The SWEAT system transfers low-grade (waste) heat into cold. In this way, available heat at approximately 80-90 °C can be used for cooling. Because the SWEAT system has also a storage function, the cold can be produced at a different time from when the heat is available.

A SWEAT module exists of two connected compartments:

  • The accumulator, which contains Na2S. Water is chemically absorbed by the salt and can be separated when the salt is sufficiently heated
  • The vaporiser/condenser, where water is condensed or vaporised
The SWEAT modules operate in three modes:
  1. Charge - waste heat input
  2. Storage - closing of compartments
  3. Discharge - production of cold

Modules are operated in cycles -----> batch cooling
Combining modules -----> continuous cooling