Industrial Buildings

By Josh

Ventilation in the room can be carried out with 2 versions: the displacement of air pollution and diluting it with fresh and clean. Displacement ventilation airflow is the displacement of the exhaust air, and as the gradual mixing it with uncontaminated air. Ventilation replacement with active stretch and passive influx – an ideal option, it is assumed that clean air is delivered evenly in the room through one of the inputs. Dirty air is the same axial fans, who are at the opposite end of the building. In theory, this scheme is best suited for larger rooms, but in real life with her performance revealed many problems that hinder proper operation of the ventilation system. Firstly, the construction of existing and inlet openings for air, and their aerodynamic characteristics are not always satisfy the theoretical laws of distribution and movement of air.

Secondly, the amount of exhaust fans must be recalculated. Above described problems gave rise to improved methods of ventilation and new ones. Ventilation mixing and dissolution – forced ventilation. In such a case requires not only the passive influx of clean air, but also active. Is also required regarding the performance exhaust. Actively the supplied fresh air dilutes the contaminated air, mixing it. Centrifugal fans in the room pressurized to help improve the indent of dirty air.

However, they also impede the flow of clean air in the room. Therefore, when designing the ventilation system is necessary to accurately calculate the ratio of the inflow – Stretching. The choice of ventilation equipment. Fans provide the necessary ventilation in rooms with forced-air ventilation. There are several important factors determining the choice of fans: – Type of fans – the electric motor, casing, impeller – Performance Fan – noise – the type of ventilated rooms. Fans come in 3 types: ceiling, axial, centrifugal. Centrifugal create more pressure with less noise, in contrast to axial flow fans. However, the latter have a greater performance ceteris paribus. Installing the complex in the manufacture of centrifugal fans worth more than others. However, the quality level of ventilation is much higher. Well-organized procedure collection of ventilation and the design schemes of ventilation and their installation will ensure correct air in the room.

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