Absorption chiller uses a heat source (solar energy or other) to provide the energy needed to drive the cooling process. This chiller can be used in buildings for air conditioning.
Solar absorption chillers are driven by driven by thermal energy produced from the sun.A thermal compression of the refrigerant is achieved by using a liquid refrigerant and a heat source, which is in turn from the solar water heating, replacing the electric power consumption of a mechanical compressor.
For chilled water above 0 °C, as it is used in air conditioning, typically a liquid H2O/LiBr solution is applied with water as refrigerant. Nevertheless, other liquid solutions can be used like H2O/LiCl or NH3/H2O which permits to produce chilled water at temperatures below 0 °C.
The main components of an absorption chiller are the generator, the condenser, the evaporator and the absorber.
The cooling effect is based on the evaporation of the refrigerant (water) in the evaporator at very low pressure. The vaporised refrigerant is absorbed in the absorber, thereby diluting the H2O/LiBr solution. To make the absorption process efficient, the process has to be cooled. The solution is continuously pumped into the generator, where the regeneration of the solution is achieved by applying the driving heat such as from hot water supplied by a solar collector.
The refrigerant leaving the generator by this process condenses through the application of cooling water in the condenser and circulates by means of an expansion valve again into the evaporator.Feel free to contact us for more details.