Research of the microclimate formed by the local DCV

•A new ventilation system for office premises, local DCV (LDCV), was studied.•Outdoor air is supplied by personal ventilation (PV).•The temperature is kept optimal at the local workplace and acceptable in the rest of the enclosure.•ANSYS computer simulation and experimental results of LDCV are presented.•As compared to mixing ventilation (MV), it saves up to 50–60% of energy resources and 15–20% to PV.

The main method of raising the energy efficiency of ventilation systems is the use of demand-controlled ventilation systems (DCV) that adjust fresh air inflow depending on how much is needed. A variety of DCV systems in office buildings is personal ventilation (PV) systems that supply air into a person's breathing area, thus ensuring optimal air quality in the breathing area. Optimal air temperature values are maintained in the whole volume of the room using, e.g., fan coils. It is practical to keep the temperature optimal only in the area where the person is located, while in the rest of the room acceptable temperatures will suffice.This article features the findings of a study into microclimate formation by a local demand-controlled ventilation system (LDCV). The novelty of this development is the use of personal ventilation with an additional ventilation system for cooling air to the optimal temperature around the person's body only.Computer simulation carried out using ANSYS software and a series of experiments on a laboratory LDCV prototype confirmed that it ensures optimal air temperature and motion near human body. The system's air-saving capability reaches 50–60% as compared to mixing ventilation and 15–20% as compared to personal ventilation.