Comparative analysis of the layout solutions of ventilation and air conditioning systems
The article deals with the issues related to the study of aerodynamic and energy characteristics of the two layout solutions of mechanical ventilation and air conditioning systems - with the placement of the fan before and after the heater. Based on the use of graphoanalytic method of studying the parameters of the fan in the ventilation network, the dependences determining the aerodynamic and energy characteristics of the systems in three characteristic modes of their operation - at ambient temperatures equal to the design, the average temperature of the heating period and +8 ° C are obtained. The obtained dependences indicate that the installation of the air heater after the fan allows to increase the level of energy efficiency of the system in comparison with the placement of the air heater in front of the fan in the cold period of the year under the thermally unsteady operation of the supply ventilation system.