An absorption chiller refrigerator system with an evaporator-absorber section and a generator-condenser section disposed together within a housing. The evaporator-absorber system has an evaporator section having an evaporator and an absorber disposed together within the evaporator section but separated by a perforated plate within the evaporator section. The generator condenser system has a generator section having a generator and a condenser disposed together within the generator section but separated by a perforated plate within the generator section. Perforations in the perforated plate of each of the evaporator section and the generator section are cone-shaped passages.

An absorption chiller refrigerator system with an evaporator-absorber section and a generator-condenser section disposed together within a housing. The evaporator-absorber system has an evaporator section having an evaporator and an absorber disposed together within the evaporator section but separated by a perforated plate within the evaporator section. The generator condenser system has a generator section having a generator and a condenser disposed together within the generator section but separated by a perforated plate within the generator section. Perforations in the perforated plate of each of the evaporator section and the generator section are cone-shaped passages.

An absorption chiller refrigerator system with an evaporator-absorber section and a generator-condenser section disposed together within a housing. The evaporator-absorber system has an evaporator section having an evaporator and an absorber disposed together within the evaporator section but separated by a perforated plate within the evaporator section. The generator condenser system has a generator section having a generator and a condenser disposed together within the generator section but separated by a perforated plate within the generator section. Perforations in the perforated plate of each of the evaporator section and the generator section are cone-shaped passages.

An absorption chiller refrigerator system with an evaporator-absorber section and a generator-condenser section disposed together within a housing. The evaporator-absorber system has an evaporator section having an evaporator and an absorber disposed together within the evaporator section but separated by a perforated plate within the evaporator section. The generator condenser system has a generator section having a generator and a condenser disposed together within the generator section but separated by a perforated plate within the generator section. Perforations in the perforated plate of each of the evaporator section and the generator section are cone-shaped passages.

An absorption chiller refrigerator system with an evaporator-absorber section and a generator-condenser section disposed together within a housing. The evaporator-absorber system has an evaporator section having an evaporator and an absorber disposed together within the evaporator section but separated by a perforated plate within the evaporator section. The generator condenser system has a generator section having a generator and a condenser disposed together within the generator section but separated by a perforated plate within the generator section. Perforations in the perforated plate of each of the evaporator section and the generator section are cone-shaped passages.

An absorption chiller refrigerator system with an evaporator-absorber section and a generator-condenser section disposed together within a housing. The evaporator-absorber system has an evaporator section having an evaporator and an absorber disposed together within the evaporator section but separated by a perforated plate within the evaporator section. The generator condenser system has a generator section having a generator and a condenser disposed together within the generator section but separated by a perforated plate within the generator section. Perforations in the perforated plate of each of the evaporator section and the generator section are cone-shaped passages.

A Step Flow control device and methods therefore provide instructions to control operation of various absorption chiller components based on measured load or temperature information. Operating an absorption chiller according to Step Flow balances the flow of heat energy through the absorption chiller to increase efficiency and prevent crystallization. The control device may be integrated into various components of an absorption chiller or may be remote therefrom. In this manner, Step Flow can be used in new absorption chiller installations or be used to retrofit existing installations.

A carbon dioxide/co-fluid mixture is provided for use in a refrigeration cycle in which the carbon dioxide is alternately absorbed and desorbed from the co-fluid. Suitable co-fluids are selected from the class of alkoxylated carboxylic amides, wherein the amides are cyclic or non-cyclic. It has been discovered that N-2,5,8,11-tetraoxadodecyl-2-pyrrolidinone and its homologs exhibit an advantageous property of a high rate of desorption at lower temperatures.

A carbon dioxide/co-fluid mixture is provided for use in a refrigeration cycle in which the carbon dioxide is alternately absorbed and desorbed from the co-fluid. Suitable co-fluids are selected from the class of alkoxylated carboxylic amides, wherein the amides are cyclic or non-cyclic. It has been discovered that N-2,5,8,11-tetraoxadodecyl-2-pyrrolidinone and its homologs exhibit an advantageous property of a high rate of desorption at lower temperatures.

A solar powered absorption cooling system employing refrigerant-absorbent solutions such as water and lithium bromide and hybrid storage capabilities, and a method of employing the system in refrigeration and air conditioning units. The system includes a first temperature control valve and second temperature control valve that together regulate the flow of solar heating fluid into the generator and substantially reduce absorbent crystal formation.