Ventilation

Contents

Contents

Introduction

1. Object characteristic, source data

2. Air exchange according to established standards and multiplicities

3. Selection of calculated parameters

3.1.Computed ambient air parameters

3.2.Computed parameters of internal air

4. Calculation of the number of hazards released in the room

4.1. Calculation of heat inputs in rooms

4.1.1. Heat emissions from solar radiation

4.1.2. Heat emissions from artificial lighting

4.1.3. Heat emissions from people

4.2. Determination of moisture intake

4.2.1. Ingress of moisture from people

4.3. Determination of gas emissions

5. Calculation of air exchange

5.1. Air exchange by assimilation of heat and moisture emissions of rooms using I-d-diagram

5.2. Air balance of room and building as a whole

6. Selection of air inlet and air outlet devices

7. Selection of plenum chambers

7.1. Selection of type and number of plenum chambers

7.2. Select Heating Section

7.2.1.Selection of heating section for plenum chamber 2PK-

8. Ventilation system layout and design solutions

9. Aerodynamic calculation of ventilation systems

10. Select Fans

11. List of literature

Ventilation creates air conditions favorable for human health and well-being, meeting the requirements of the technological process, preservation of equipment and building structures of the building, storage of materials, etc.

The main task of ventilation is to maintain the state of the air environment, favorable for staying in the human room and performing technological processes.

Ventilation means controlled air exchange carried out to create an air environment in the premises that is favorable for human health and work.

Ventilation system means the combination of technical means and devices required for air exchange.

The purpose of this course project is to design a supply ventilation system for the building of the training and production plant located in Vladimir.

To achieve the goal, the following objectives must be achieved:

- identify and describe the proposed solutions for the building ventilation system;

- calculate the air mode of the design rooms;

- perform aerodynamic calculation for plenum and exhaust ventilation systems;

- calculate and select the main equipment of plenum and exhaust units.

1) development district - the city of Vladimir; estimated geographical latitude - 56 s.s. according to [1];

2) two-story building - training and production plant;

3) design rooms -11 carpentry for 50 places on the first floor, 16 workshop for electrical engineering on the first floor, 17Productive room for training is being built. Specialties on the second floor, 20 Workshop on turning on the second floor

4) number of people respectively 50.50.50.50

5) the main facade faces northwest

6) room height 3m _

7) height of windows 2.2m

8) Average temperature of heating period tcp.ot.p = 3.5 0С

9) Heating periods - Zot = 213 days.

Air ducts are applied to the first and second floor plan to dispense and remove air.

For rooms with a small amount of air exchange, 1 grid and 1 channel are selected, for a room with a significant air exchange, a horizontal air duct and several grids are selected, the number of which is selected depending on the air flow rate in the room.

The plenum chamber is installed under the room, in which the noise will not distract from the normal atmosphere.

Metal air ducts (steel) are installed in the basement. Air ducts made of slag concrete slabs are installed in the attic and other rooms. Noise silencers are installed on the plenum chambers 2PK10 to absorb the noise level. Channels for this supply and supply system are installed metal (steel)

During the aerodynamic calculation of the plenum system, large-section air ducts were adopted, which led to a decrease in the speed of movement in them, but increased metal consumption and complicated the installation of the system. To avoid this, it is possible to reduce the live section of the channels, but the speed should not be higher than the permissible value [5].

Calculation of supply and exhaust systems of air ducts is reduced to determination of dimensions of cross section of channels, their resistance to air movement and connection of head of parallel connections.

We will calculate head losses using the method of specific head losses for friction. Aerodynamic calculation consists of two stages:

- calculation of sections of the main trunk direction;

- Linking sections of the system.

1. SP 131.13330.2012. Construction climatology. Updated SNiP version 23-01-99 *

2. Designer Reference Book. Part 3. Ventilation and air conditioning. Book 1. ed. N.N. Pavlova. - M. Stroyizdat, 1992

3. SP 60.13330.2012. Updated version of SNiP 41-01-2003

4. Handbook on heat supply and ventilation. Book 2. Ventilation and air conditioning. R.V. Shchekin. Kiev, "Budivelnik." 1976.

5. Methodological guidelines for the implementation of course projects. Section "Calculation of air exchange of civil buildings." Zelenko G.N. Tula, 2001.

6. Designer Reference Book. Part 3. Ventilation and air conditioning. Book 2. ed. N.N. Pavlova. - M. Stroyizdat, 1992.

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