This article discusses the features of the processes of heat and mass transfer, taking into account the formation of the contact surface during the interaction of air and water droplets sprayed in the working space of the spray chamber. The results of numerical modeling of heat and mass transfer processes are presented, which made it possible to establish the conditions of liquid atomization that ensure the most efficient flow of heat and moisture exchange processes in the working space of the spray chamber.

Keywords: air handling unit, spray chamber, heat and mass transfer, diffusion model, efficiency, droop parameters, calculation model, numerical simulation

A scheme of the HVAC system with local (zone) air handling units providing the possibility of heat and humidity treatment of air is developed to maintain the set temperature and relative humidity of the supply air. Features of regulation of moisture content of supply air in HVAC systems are considered and an analysis of air processing processes was carried out using the I-d diagram for the warm and cold periods of the year. A method for control the moisture content of the supply air is described, which allows more accurately to maintain the air parameters when the heat and humidity loads in the serviced rooms change.

Keywords: multizonal HVAC system, local (zone) air handling units, heat and moisture exchange, I-d-diagram, regulation of moisture content

In the article discusses the features of work air handling unit (AHU) based on spray chamber (SC), developed the design of the test bench and presents the results of the tests SC, identify ways to improve them, particularly in the lower part of the workspace was placed plane-parallel packing. It was established experimentally that the efficiency of processes of heat and moisture transfer increased by an average of 6 - 10%.

Keywords: air handling unit, spray chamber , heat and mass transfer, efficiency