Abstract and keywords
Abstract (English):
The paper presents the results of a theoretical study of existing terms of hybrid ventilation. A classification of hybrid ventilation strategies has been drawn up: concurrent and changeover operations. Concurrent operation includes the sharing of mechanical and natural ventilation systems, for example, in the case of natural inlet and the removal of contaminated air from the room by axial roof fans; mechanical systems, equipped with low-pressure fans, used in conjunction with technologies aimed at increasing natural pressure (heat and wind inducement). Changeover operation includes seasonal work, night cooling and local alternating work. The analysis of climatic characteristics based on data from meteorological station 27612 (Moscow, VDNH) shows that the average temperature of outdoor air exceeds the requirement temperature for natural ventilation calculations for most of the year. Annual average air exchange factors for the period 2016-2020 are less than 50 %, which proves the need for a seasonal hybrid ventilation system. Based on the calculation of average monthly air exchange factors, the mechanical inducement is recommended from March to November.

Keywords:
hybrid ventilation, mixed-mode ventilation, natural ventilation, air exchange factor, thermal buoyancy, wind driven ventilation
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