Ventilation of the club for 250 seats

Contents

Design Input

Introduction. Construction characteristics of the building

Calculation of air exchanges in the auditorium

Determination of hazards from viewers in the visual

club hall

Calculation of required air exchange in visual

Hall

Definition of air exchanges in auxiliary rooms

Basic design solutions of plenum and exhaust ventilation systems

Selection of louver grilles

Selection of natural ventilation channels

Auditorium exhaust system (deflector calculation)

Calculation of scene deflectors

Calculation of auditorium deflectors

Aerodynamic calculation of ventilation systems

9.1 Calculation of mechanical plenum system of auditorium I

9.2 Calculation of mechanical exhaust system B

9.3 Calculation of natural exhaust system VE

Approximate calculation of mechanical ventilation systems

Equipment selection for all mechanical systems

Development of the plenum chamber of the auditorium

12.1 Selection of grids and dampers

12.2 Calculation and selection of filters

12.3 Calorifer Calculation and Selection

12.4 Fan Selection

12.5 Selection of auxiliary equipment

Selection of air filters for plenum system of auxiliary rooms

Calculation of the noise absorber of the visual plenum system

List of literature

Applications

Design Input

Variant No. 11

The place of construction is the city of Yekaterinburg.

Barometric pressure - 729 mm. Hg. Art.

Design conditions for:

a) warm period

- design temperature (tan) - 20.7 wasps.

- heat content of air (Ja) - 11.5 kcal/kg.

- wind speed (Va) - 4 m/s.

b) cold period

- design temperature (tan)-35 wasps.

- heat content of air (Ja) - -8.3 kcal/kg.

- wind speed (Va) - 5.2 m/s.

4. Equipment power - 5.0 kW.

5. The dust content of the outside air is 4 mg/m3.

6. Orientation on the main facade - CB.

7. The capacity of the auditorium is 250 people.

8. Coolant parameters - water - 115-70 ° С.

9. The CO2 concentration in the outside air is 0.31 g/kg.

Introduction

The main direction of the development of ventilation is the work on creating favorable conditions for high-performance work, improving the living and leisure conditions of the population, improving control over the state of the internal environment and its sources of pollution.

In modern production conditions, the main task of ventilation is to maintain permissible parameters in the premises and ensure the best conditions for work in the industry. When designing ventilation, the traditional preference is given to the simplest of the methods that provide the given conditions, in which the designers strive to reduce the performance of the systems, taking reasonable design and planning solutions of the building, introducing technological processes with a minimum of harmful emissions, arranging shelters for the formation of harmful emissions.

Construction characteristics of the building.

In plan, the building is close to a rectangle with dimensions in the main axes of 51000x48000 mm. Arceless, bearing structures - external walls made of brick, 640 mm thick, and internal, 380 mm thick, coating thickness 400mm. Floors - of reinforced concrete hollow slabs. The auditorium is covered by railway plates on 15-meter farms.

Basic design solutions of plenum and exhaust ventilation systems

The structural solution of the scheme of organization of air exchange in the auditoriums should be organically connected with the volume and layout solutions of the hall. In addition, the air exchange organization scheme should be adopted taking into account the working temperature difference between the supplied supply air and air in the area of ​ ​ spectators (working zone) in the cold period of the year and taking into account the design features of the auditorium.

For auditoriums, clubs and cinemas with 150600 seats, plenum ventilation systems with a mechanical impulse of air movement are designed, operating in the warm period of the year in the outside air, and in the cold period with partial recirculation. Exhaust ventilation systems may be naturally or mechanically induced. The clubs design a common plenum system of the auditorium and scenes, separate exhaust systems. Supply air is supplied to the stage due to overpressure in the hall created by the supply system. Through the stage, 17% should be removed, and through the auditorium 83% of the total volume of air removed from the hall. The rest of the air shall be removed through recirculation and exhaust devices of the auditorium.

In the building, mechanical exhaust from the block of film projection and bathrooms was designed.

Air ducts are routed along corridors hidden by a set ceiling, which reduces the requirements for their decoration.

Natural exhaust ventilation is provided from the auditorium, stage premises, as well as from separate or separate administrative and economic premises. Exhaust from auxiliary rooms is channel. It is recommended to place the exhaust ducts of adjacent rooms near one wall, which simplifies their grouping and reduces the number of exhaust shafts on the roof.

In this case, the auditorium has the shape of a rectangle. Therefore, to ensure air exchange of the auditorium, a scheme with a dispersed supply of supply air directed from the screen is adopted. Air is delivered through air distributors of two parallel branches of air ducts with spraying (elevation of air distributors bottom + 3.500) jets. Air bleeding for recirculation is carried out through grids of recirculation air duct. The remaining air is removed outside through deflectors installed on the roof of the building .

The building is equipped with two branched systems of mechanical plenum ventilation. One system is designed for all rooms of the building. A separate plenum system with recirculation is designed for the auditorium. A bypass valve is provided through which part of the air is passed (without heating), another part of the supply air is passed through the heater, where it is overheated. After that, both parts are mixed, and a mixture with the designed inflow temperature is obtained.

The supply systems equipment is located in special rooms (ventilation chamber) located in the basement.

The building is equipped with mechanical and natural local exhaust systems. The number of exhaust systems depends on the following factors:

space assignments

nature of hazards

Separate mechanical exhaust units are provided for sanitary units and cinema projection unit. In the film projection, local suckers are provided above the film projectors, in the form of umbrellas, and general exchange exhaust from the upper zone according to multiplicity standards. It is impossible to lay transit ventilation channels through the film projection, since the room is fire hazardous. Exhaust system shafts are used for air ejection. Since the design building has an attic floor, the height of the ejection should be at least 1 m, from the roof elevation.