Efficiency of ventilation systems with intermittent operation

Abstract

Effective management of the ventilation system is one of the main priorities for improving the energy efficiency of public buildings today. There are two types of energy saving in ventilation systems. The first is saving electrical energy, the second is saving thermal energy. For the desighned shopping centre "Magnit" (Tyumen) the authors proposed the ventilation system with intermittent operation. In the ventilation system of the desighned building, we calculated and selected energy consuming equipment of Russian manufacturers. The airflow rate of the ventilation system depends on the number of visitors and takes into account the irregularity of visits to the designed shopping centre. A graph of the distribution of the required airflow rate by period was plotted. An automation scheme for the ventilation system was proposed. The consumption of electricity of the ventilation system with intermittent operation during the year and the annual heat consumption were calculated. Calculations showed that the annual energy cost for ventilation system with intermittent operation in the projected building would be 1.72 times less than for the permanent system, the equipment would pay off in 0.4 years. Thus, it is possible to speak about the effective application of ventilation system with intermittent operation in the designed buildings with irregularity of visits.