Abstract: There is disclosed a temperature control system for an absorption refrigerating apparatus comprising an evaporator, an absorber, a condenser, a regenerator, a solution heat exchanger, a solution pump, a cooling medium pump, and piping operatively connecting these parts together. Where absorption refrigerating machines are arranged in two or more stages with respect to the flow of cold water to be circulated at a load side, the machine of each stage has a cold water outlet temperature detector, and a temperature controller for controlling the amount of heat of a machine-driving heated fluid in accordance with the cold water outlet temperature of each stage. A control circuit is so arranged that the temperature controller of the first stage, or the temperature controllers of the intermediate stages except for the temperature controller of the final stage are controlled by a proportional control whereas the temperature controller of the final stage is controlled by a PID control.

Abstract: A cooling system including a compression refrigeration unit and an absorption refrigeration unit, with the compression refrigeration unit including a compressor having a capacity control mechanism; a condenser for cooling and condensing a compressed refrigerant gas through a heat exchange between the refrigerant gas and a cooling medium circulated through the condenser; and an evaporator into which the condensed refrigerant is introduced through an expansion means so as to be evaporated and cool a medium by the latent heat derived from evaporation.

Abstract: A dilute solution producing system of an absorption refrigerating apparatus wherein spraying of a solution and absorption of a refrigerant gas into the solution take place in a plurality of stages to produce a solution of low concentration. A solution of high concentration is sprayed in a zone of cooling water of high temperature in an absorber and the refrigerant gas is absorbed into the sprayed solution to produce a solution of intermediate concentration, and the solution of intermediate concentration is sprayed in a zone of cooling water of low temperature and the refrigerant gas is absorbed into the sprayed solution to produce a dilute solution as desired.

Abstract: A combination of an internal combustion engine and an absorption type refrigeration system is designed to make a simultaneous use of both of the engine exhaust gas the heated engine cooling water. The internal combustion engine and the absorption type refrigeration system are combined such that the exhaust gas is utilized as the heat source for a gaseous refrigerant generator having the highest operating temperature in the system while heated engine cooling water is utilized as the heat source for another generator which operates at a temperature lower than the operating temperature of the first-mentioned generator.