OPTIMIZATION OF THE INTENSIVE METHOD OF VENTILATION IN RESIDENTIAL BUILDINGS IN ORDER TO INCREASE ENERGY EFFICIENCY

Problem. More than 80% of buildings in Ukraine have an unorganized ventilation system, which often works poorly. People ventilate the room by opening balcony doors, windows or vents. At the same time, the degree and time of opening can be different (permanent method – with a small opening area or intensive short-term method – with a large area of ​​ventilation of the room) (Fig. a-b), these parameters depend on the habits and feelings of the person. The selection of the ventilation time can save energy on space heating compared to a constant ventilation method. Fig. c. shows the velocity vector in the room.

                                               а                                                                     b

Suggestion for solving the problem. Using the developed CFD model, it is shown that the intensive method of room ventilation achieves energy savings of up to 15% compared to constant ventilation. Fig. d allows you to determine the optimal ventilation time depending on the size of the window, the volume of the room, the temperature difference between the room and the environment.

c	d

Commercial offer. Distribution of nomograms like Fig. d, which allow saving up to 15% of energy in apartments.

Publications:

Andrii Zakovorotnyi, Olga Tadlia, Pavel Krukovsky Energy Efficiency of Short-Term Natural Room Ventilation // Proceedings of REHVA Annual Conference 2015 “Advanced HVAC and Natural Gas Technologies” Riga, Latvia, May 6 – 9, 2015, р. 201-205. https://journals.rtu.lv/index.php/AHNGT/article/view/rehvaconf.2015.029/700