Kühlmittelpaare

Kühlmittelpaare, also known as refrigerant pairs or working fluid pairs, are sets of two substances used in certain thermodynamic cycles, particularly in refrigeration and heat pump systems. Typically, one substance is a refrigerant and the other is a desiccant or absorbent. The primary purpose is to achieve a specific cooling or heating effect by leveraging the physical and chemical properties of these two components in conjunction.

In absorption refrigeration systems, a Kühlmittelpaar often consists of a refrigerant like ammonia or water and an absorbent like lithium bromide or sodium bromide. The refrigerant evaporates and absorbs heat, then it is absorbed by the absorbent. This absorption process is reversible, allowing the refrigerant to be released again through heating, thus completing the cycle. This method is particularly useful in applications where waste heat is available for regeneration.

Another application can be found in adsorption chillers, which use a solid adsorbent and a refrigerant. The refrigerant is adsorbed onto the surface of the solid material and then desorbed when heated. The choice of Kühlmittelpaar is crucial and depends on factors such as operating temperature, desired cooling capacity, efficiency, and safety considerations. The compatibility of the two substances and their interaction under various pressure and temperature conditions are also important design parameters. Kühlmittelpaare offer an alternative to conventional compression-based refrigeration technologies, often with lower energy consumption and reduced environmental impact.