AUTOMATIC CONTROL SYSTEMS FOR IMPROVING THE EFFICIENCY OF ABSORPTION REFRIGERATION UNITS

The general concept of the ACS constructing for increasing the efficiency of the artificial cold production process in the ARU is substantiated. The described ACS provides necessary degree of the ammonia vapor purification from the water in all ARU modes and minimizes heat loss from the dephlegmator surface. The changes of ARU static and dynamic properties during changes the intensity of heat removal from the dephlegmator outer surface to the environment and the values of heat capacity that is supplied to the generator unit were studied. New efficient automatic control systems (ACS) of the artificial cold manufacturing process in the absorption refrigeration units (ARU) are considered. The aim of the development is to increase their energy efficiency and to improve storage conditions. This is achieved by maintaining stable temperature conditions in the refrigerated chambers and by reducing the transition processes’ time. Different options of the ARU ACS structures were developed, programmatically implemented and experimentally explored. It is shown that the application of such ACS as a part of ARU allows to achieve the main goal.