HVAC of a two-story building.

1. heating and ventilation.

1.1. Source data.

The section of the project provides for solving the main technical issues of heating, ventilation of air.

The design section is performed in accordance with the customer's technical assignment, architectural and construction drawings, applicable design codes and rules:

- SNiP 41012003 "Heating, ventilation and air conditioning";

- SNiP 23022003 "Thermal protection of the building";

- SP 231012000 "Design of thermal protection of the building";

- SNiP 2.09.0487 * "Administrative and household buildings";

- SNiP 210197 * "Fire safety of buildings and structures";

- SNiP 230199 * "Construction climatology."

Climatic data of the construction area:

- average temperature of the coldest five-day period -28 ° С;

- average outside air temperature for the heating period -3.1 ° С;

- design temperature of warm period + 22.6 ° С;

- estimated wind speed 4 m/s in the cold period of the year and 1 m/s in the warm period of the year.

- Duration of heating period 216 days.

Heat transfer resistance (m2/S * W) in the room:

Walls - 0.811

Roof - 1,011

Windows - 0.350

Doors, gates - 0.461.

1.2. Technical solution.

Internal temperature in production rooms and RP - 0.4 kV is accepted + 5 ° С, in control room + 22, in administrative and household rooms - according to SNiP 2.09.0487 *.

As heating devices in all rooms, long-wave electric emitters of the EkoLine type are adopted.

In the rake compartment, plenum ventilation with a mechanical impulse was designed, in 10 times the volume. Exhaust is carried out from the lower area of the room (80%) and from the upper area (20%). The air removed from the rake compartment, containing bad smelling substances, is cleaned in a Yatagan gas converter.

In the engine room, plenum ventilation with mechanical motive is designed, designed for assimilation of heat wastes, exhaust is carried out from the upper zone.

Plenum ventilation with mechanical and natural motive designed in room RU0.4 kV, designed for assimilation of heat wastes. Drawing is carried out mechanically when the internal temperature in the room reaches + 29 ° С. The inflow is carried out naturally, through a valve with an electric drive and electric heating, blocked with an exhaust system.

The plenum ventilation system serving the rake and machine rooms is located in the ventilation chamber at elev. + 2.910. Air intake is performed at the level of not less than 2.0 m from ground level.

Exhaust systems are located in serviced rooms and on the roof with air release at the level of at least 1.0 m above the level of the roof (upper point).

Air exchange in domestic premises is accepted according to SNiP 2.09.0487 *. Exhaust is carried out using a shaft with a deflector, inflow is supplied due to infiltration through the looseness of the fences. Heat for heating the infiltrating air in the cold period of the year is taken into account in the calculation of heating.

Install heating and ventilation systems in accordance with SNiP 3.05.0185 and PUE.

The characteristics of the equipment are given in Table 1.

The main indicators of the project are given in Table 2.

Air exchange by rooms is given in Table 3.

1.3. Fire fighting measures.

To ensure the fire safety of the facility, it is provided to disconnect all ventilation systems in case of fire.

Since the height of the object is < 10 m, the production category is "D," and building structures have a P degree of fire resistance, in accordance with paragraph 8.2 of SNiP 41012003, this object does not need emergency smoke ventilation.

1.4. Used materials for ducts, piping, thermal insulation, installation.

Ventilation equipment is designed for domestic and imported manufacture.

Air ducts are made of galvanized steel according to GOST 1491880, thickness, depending on cross section.

Air distribution grilles used domestic "Arctic" with guiding horizontal blinds.

Systems are equipped with control panels of supply air heating temperature by controller from channel sensor located inside air duct.

Installation of systems shall be carried out in accordance with SNiP 2.05.0185 "Internal Sanitary and Technical Systems," SNiP 12042002 "Labor Safety in Construction. Part 2. Construction production "

1.5. Noise protection.

To achieve the standard noise level, it is provided:

- arrangement of ventilation chambers with sound-reading lining;

- installation of noise silencers in the system of air ducts;

- use of vibration bases and flexible connections of air ducts with equipment;

- limitation of air velocity through air ducts;

- limitation of the number of fan revolutions;

- use of ventilation equipment in noise-proof design;

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