Heating and ventilation of the cottage.

1. Introduction

1.1 . The design of the boiler house of an individual residential building running on gas fuel was carried out on the basis of the contract and according to the technical assignment for the design.

1.2. The project includes:

- Thermal and mechanical part of TM (23 kW boiler room).

2. Initial data and basic technical requirements.

2.1. Water temperature:

- supply pipeline - 70 ° С;

- return pipeline - 50 ° С;

- water temperature at GVA - 60 ° С

2.2. Fuel for boiler house - natural gas. Gas pressure in front of ball cranes

burner devices are 1520 mbar.

2.3. Boiler room layout is made in accordance with construction drawings,

provided by the Customer.

2.4. Boiler plant capacity is determined based on total thermal

building loads calculated in the working project "Heating and Ventilation "

16.05.05.011 OG

3. Thermomechanical part.

3.1. Equipment layout.

The boiler room is located in a specially designated room on the basement of the building. The De Dietrich gas boiler of the DIETRIGAZ DTG SH 114 K-23 kW series is installed in the room, equipped with a boiler GMT 130 B (130L) standing under the boiler, and a boiler connection group with a loading pump and a boiler control unit MV3.

The binding of the boiler provides the possibility of servicing it and the equipment located nearby, as well as the inspection and repair of the boiler.

Boiler is connected through disconnecting fittings to distributing and collecting headers made of shaped square pipe with size of 80x80mm. 2 circuits are connected to the manifolds:

- for house heating system with UPS 25/60 circulation pump;

- on the "warm floor" system of the house with the UPS 25/60 circulation pump.

The boiler has a boiler safety group Pn = 3 bar in accordance with SNiP 351176 "Boiler units" with additions and SNiP 2.04.0887 * "Gas supply."

Straight and reverse lines of circuits are equipped with the necessary shutoff valves and measuring instruments.

Banding on boiler water is made of steel shaped square and steel black water and gas pipes.

Boiler makeup is carried out by tap water.

Temperature extensions of boiler circuits and systems are compensated with a membrane tank with a capacity of 80 l'Reflex "

Hot water from the boiler is connected to the hot water supply system, while return (recirculation) is supplied to the boiler using the UP 20/15 "Grundfos" pump.

The drinking water heating system is lined with PEX/Al TeCe multi-layered pipe.

Temperature expansion in the GVA system is compensated by a membrane expansion tank with a capacity of 12 l'Reflex. "

Combustion gases are taken away from a copper by the double-walled Æ gas flue of 130 mm "Jeremias".

The chimney includes: transition from boiler to gas duct, elbow, 2 pipes with a length of 1000 mm and 500 mm.

All drains of the furnace channel into the existing pit with flexible hoses.

3.2. Technical characteristics of the main equipment.

Boiler De Dietrich series DIETRIGAZ DTG SH 114 K - power 23 kW;

- a gas output (15 °s1030mbar) - 2.98 m3/h;

- boiler water volume 13.8 l;

- number of burners - 3 pcs;

GMT 130 B Boiler:

- capacity 130l;

- maximum pressure of heated water up to 10 bar;

- drinking water temperature up to 60 ° С.

- capacity 420l/h at 45 ° С

4. Requirements.

4.1. For uninterrupted operation of the boiler to organize air inflow in the room

kidney. Supply channel section shall be equal to or larger than the section

chimney. In this design, the chimney section is 111.8 cm2.

4.2. Quality of feedwater for hot water boilers and heat supply system

must meet the requirements.

5. Conclusion.

The design of the boiler house was carried out in accordance with the "Rules for the construction and safe operation of steam boilers with a steam pressure of not more than 0.07 MPa, water heating boilers and water heaters with a water heating temperature of not more than 388K (115 ° С)"

Ventilation system.

The working ventilation project of the premises of the residential building in the village of Petropavlovskaya Borshchagovka was carried out on the basis of the Customer's task, architectural and construction drawings and in accordance with the current regulatory documents.

Design parameters of outdoor air for ventilation design are adopted:

- for cold period - tn = 22 С;

enthalpy (heat content of air) J = 25.3 kJ/kg;

- for warm period - tn.cond. = + 28.5 С;

J = + 54kJ/kg, d = 9.8 g/kg.

tn.vent. = + 22.3 С;

Air parameters are accepted:

- in residential premises - in accordance with the design standards;

Creation and maintenance of comfortable conditions in premises of a residential building is provided by the device:

- mechanical exhaust ventilation systems from the bathrooms of the house;

- natural exhaust ventilation systems from the boiler room and the void house, mechanical exhaust ventilation system from the kitchen;

- local suction by channel fan from gas plate (B3).

Exhaust systems with mechanical motion of air consist of exhaust holes equipped with louver grates, air receptacles, air ducts through which air removed from rooms moves into exhaust chamber or to fan, exhaust chamber in which fan with electric motor is installed.

Naturally induced exhaust systems consist of air intake holes with grids, vertical channels and exhaust shafts.

The design provides for the use of axial fans. Air movement occurs without a network of ducts, since the pressure developed by axial fans is insignificant (up to 500 Pa).

Ventilation system air ducts are made in the form of channels in building structures.

To protect against atmospheric precipitation, air discharge shafts of mechanical ventilation systems are equipped with umbrellas made of sheet steel. Umbrellas are installed in exhaust systems of natural ventilation at air discharge shafts.

When roof fans are installed in ventilation systems, the need for air discharge shafts falls away.