Absorption chiller with ammonia as refrigerant are used mostly for cooling in the freezing section (at temperatures from 0 ° C to -60 ° C). For higher refrigeration temperatures (e. g. for air conditioning with +6 ° C) absorption refrigeration systems working with lithium bromide and water are common. Such systems are not supplied by Colibri.

For the process in the ARP the temperature of the available driving heat is of great importance. As lower the generated cold temperature should be, as higher must be the temperature of the the driving heat. Further explanations and diagrams on this subject can be found in our documentation, which you can see in the download area. In which form the driving heat is delivered basically do not care. The heating must be transferred via a heat exchanger (the so-called generator) into the ARP process. The most common way to transport the heat to the generator is by hot water or process steam. However, a direct firing system, the use of hot gases (e. g. flue gases), thermal oil, or other convector fluids is possible.

Basically an ARP can be incorporated by the same way as a classic compression refrigeration system for cooling goods or a process. An ARP can also be coupled with a compression system. Further details on this subject can be found in our documentation, in the download area.

Frequently as input heat for an ARP the motor cooling water and / or the exhaust gases from CHP is used. This so-called „trigeneration“ or „CCHP“ leads often to an economic profitable system. Excess heat in form of steam or hot water from production and power plants can possibly used in an ARP for refrigeration. Thermal energy from solar plants can also be used. On the cold side an ARP can be combined with other cooling systems (e.g. ammonia and CO2 compression installations). Heat or cold storage can make sense to buffer and balance fluctuations of the heat supply and cooling demand. By using an ARP to inlet air cooling of gas turbines the turbine efficiency can be increased.

Basically everywhere where refrigeration is needed and the required heating energy is available. The following table shows examples of application.