Сонячні абсорбційні системи кондиціювання повітря на основі двоступінчастої регенерації абсорбенту

Conceptual designs have been developed for multifunctional solar air dehumidification systems, heat supply (hot water supply and heating), cold supply and air conditioning based on an open absorption cycle with direct regeneration of the absorbent. Such systems are based on pre-drying of the air flow and subsequent evaporative cooling of media in solar refrigeration systems (SRS) and thermal and humid air treatment in solar air conditioning systems (SACS). The authors used the principle of two-stage regeneration of the absorbent. The solar system consists of autonomous dehumidifying and cooling units, with each regeneration stage closed to the corresponding stage of the air absorber stage (air dryer), which allows increasing the concentration of the absorbent from stage to stage (in the range of possible concentrations of the LiBr lithium bromide solution used). Fundamental solutions have been developed for the new generation of gas-liquid solar collectors, which make it possible to exclude the desorber (absorbent solution regenerator) from the concept of the solar system, providing direct regeneration of the absorbent solution.. The work of heat and mass transfer apparatus, which are included in the drying and cooling circuits of absorption systems, is based on the principle of film interaction of gas and liquid flows using a multichannel packed structure of polymeric materials. A preliminary analysis of the capabilities of multifunctional solar absorption systems was carried out on the basis of the experimental data of the authors and the modeling of heat and mass transfer processes in the main elements of the systems with respect to the tasks of solar air conditioning systems (SACS). It is shown that, for practically any sufficiently heavy parameters of external air, solving problems of ensuring its comfortable air parameters can be performed without using traditional refrigeration equipment. The developed SACS solar systems are distinguished by low energy consumption and environmental cleanliness. [ABSTRACT FROM AUTHOR]