Method for calculating and adjusting the concentration of absorbing fluid in an absorption air conditioning device, and absorption air conditioning device for implementing said method

An absorption air-conditioning device comprising:

• a desorber having an inlet for receiving an absorbing liquid, a water vapor outlet and a liquid salt solution outlet;
• the absorbing liquid in the desorber having a concentration;
• a condenser having an inlet in communication with the water vapor outlet of the desorber via a duct to receive a vapor phase from the desorber;
• an evaporator having an inlet to receive absorbing liquid solution from the condenser, a vapor outlet and a liquid solution outlet;
• an absorber having an inlet in communication with the vapor outlet of the evaporator to receive a water vapor phase from the evaporator and an inlet in communication with the liquid outlet of the desorber to receive a liquid phase from the desorber;
• a pressure sensor for the measurement of the pressure (P) inside the desorber and a temperature sensor for the measurement of the temperature (ts) of the absorbing fluid solution at the output of the desorber;
• a regulating valve in the duct conducting the vapor phase from the desorber to the condenser;
• and
• a controller for controlling the regulating valve in response to the sensed pressure (P) in the desorber and the temperature (ts) of the liquid phase at the output of the desorber to control head loss in the duct and thus regulate the concentration of the absorbing liquid in the desorber.