Heating system engineering for multifunctional building

Our engineering design company made working drawings for heating system of multifunctional building.

Chapter “Heating”

For the building consisting of aboveground floors of the Multifunctional Complex, consisting of multifunctional public complex and multifunctional center, was developed on the basis of:

Chapter was performed as per the following regulatory documents:

Technical solutions, accepted in the documentation, correspond to the requirements of ecological, sanitary-hygienic, fire-protection and other regulations acting on the territory of Russian Federation, and provide safe exploitation of the object for live and health of the people upon observance of measures foreseen by the project.

Initial Data

Climatic data of the construction area.

The source of heat supply to the district heating network. Wiring diagram - independent. See. the fact

Heating of the housing 1 is fed from a СHP.

Thermal resistivity indexes of the envelope enclosures are accepted as follows:

For coverings and overlaps above the passages R=3,145 м2·°С/Вт

Parameters of external air for design of heating systems Temperature of the exterior air during the cold period of the year -28°С.

Duration of heating period is 214 days.

Average temperature of the heating period -3,1°С;

Determinative harmful condition is carbon oxide.

Parameters of interior air

Parameters of interior air for the premises were accepted as per:

SP 60.13330.2012, SP 118.13330.2012, SP 44.13330.2011, SP 113.13330.2012, and technical and technological task.

For design of heating of the air temperature during the cold period of the year the following items were accepted:

guest rooms, office space                                             

rooms, massage rooms

Heating

The heating system of the building 1 is water with associated and dead-end water movement in the branches, with the lower and upper location of highways. On the 4th floor of building 1 in the pool area and SPA designed system water floor heating. The swimming pool area is projected combined heating system. The perimeter of the room installed appliances water heating. To heat the space under the glass dome of the basin is provided by setting the local air heating (see volume АСТ-РД-01-ОВ1). Bathrooms feature electric warm floor.

The heat carrier - water t=80-60°C.

The heat carrier in system floor heating - water t=45-35°C.

The total heat consumption for water heating body 1 - Q=777 kW. Including:

• Heating 2-nd floor - 70 W
• Heating of the public areas of the 1st floor. - 15 W
• Heating - restaurant - 20 W
• Heating the 4th floor. (swimming pool, fitness area and Spa)- 60 W
• Heating staircases - 50 W
• Heating equipment room 3 and 14 storeys - 33 W, 
• Heating Regency club -5W,
• Heating Sky bar - 10 W,
• Heating Lounge -11 W,
• Heating of hotel rooms 5-13 FL 444 W.

All of the above heating system has an individual metering of heat located in the premises of the TSC-1. See the sheet. Distribution manifold located in the premises of the CHP-1 (See the sheets.

For rooms kitchens to install adopted steel radiators Purmo" with a smooth surface in hygienic version of "Hygiene". For all other areas of the, staircases, technical premises - steel panel radiators "Compact" (types C22). In the pool there is 1 type of heating devices: channel Emcotherm convectors without mechanical convection, type K4 (width 345mm depth 106 mm) . Hotel rooms the project includes floor convectors "Kermi", type KNV. In areas 1, 2 and 4 floors of the glazing without railings installed underfloor Emcotherm convectors with forced convection, type KQ2 (width - 345mm, depth - 106 mm, length - 1250-2150 mm). Convectors provide the rated output at power fan 50-70% (noise level at a distance of 1 m from the unit - 19-30dBA).

For devices installed in other premises (except hotel rooms and meeting) provides thermostatic elements with a casing that protects against unauthorized access. Heating in rooms Laundry service, dining halls, technological areas, kitchens, and other areas with excess heat, designed for replacing the lost heat after hours when no excess heat. In the presence of excess heat dissipation device automatically reduced by the use of thermostatic valves installed on the supply line to the heater. Regulation of heat pannel convectors with mechanical convection is carried out by changing the fan speed and the degree of opening of the thermostatic expansion valve. The fan control and the drive is performed on the signal from the room thermostat.

In the meeting rooms supported 2 temperature regime:

• meeting rooms busy - 22°C
• meeting rooms free - 16°C.

Reduction of heat transfer devices in the meeting rooms occurs by reducing the speed of rotation of the fan and closing of the thermostatic expansion valve with electric drive. The drive control by a signal from a room thermostat with built-in temperature sensor. Room thermostats are connected to a building management system. Thus, the switching operation modes heating system in the meeting rooms is performed from the remote controller.

Regulation of the temperature in guest rooms is described in detail in the section "System control room". In automatic mode, the heating system operates in the following temperaturnye modes:

• the stay of the guest in the room - 22°C
• no guest in the room - 20°C
• registration absent - 18°C
• reservation no - 16°C

Capacity of heating devices designed to maintain the temperature at 22°C at the design outdoor temperature. To regulate the heat transfer device to hook up to the heater (within communication niches) installed thermostatic expansion valve with electric actuator, which is controlled by a signal from the room controller. Switching operating modes of heating in each room is with the remote controller and on and key-card. Hotel rooms are not equipped with individual units of accounting.

Balancing of heating systems performed the following activities:

• installation of radiator valves with pre-setting
• installation manual and automatic balancing valves on the risers and branches

heating systems

The main pipes, distribution (laid open and above the false ceiling), the piping in the mines and risers in communication niches hotel rooms are made of black steel (diameter up to DN 50 (inclusive) of the gas pipes according to GOST 3262-75, over Dy 50 - from welded pipes according to GOST 10704-91). Pipes DN 15-32 laid hidden in the floor screed and the piping warm floor provided by PEX-a "Uponor".

Pipelines laid above the false ceiling height of more than 400 mm to cover thermal insulation class "NG". Pipelines laid above the false ceiling height of less than 400mm to cover thermal insulation in the form of tubes or sheets "K-FLEX ST". The article "K-FLEX ST" refers to Flammability group Г1 and meet fire certificate of the Russian Federation. The insulation thickness is selected depending on the coolant temperature and the pipe diameter (see table below). The pipework is hidden laid in the screed floor, cover it with insulation in the form of tubes "K-FLEX ST" (thickness 9 mm).

Compensation for the extension of trunk pipelines is due to the natural angle of the track. Method of angle widening is based on changing of linear guidance of piping laying by angle connection. On the risers heating system hotel rooms includes installation of expansion joints. To ensure the calculated elongation of the expansion joints will be installed fixed support.

For emptying piping heating provided by drain valves at the low points of the system. To release air in the upper points of the system provides for the installation of an automatic air vent with ball valves. Usage of ball taps is due to necessity of air valves dismantling, replacement of old ones. All pipelines must be laid with a slope of 0.002 in the direction of CHP-1. For emptying of pipelines laid in the screed to use a portable pump. Pump to attach after the drain valve is installed at the lowest point, with the top point should be open the air valve.

To prevent penetration cold air through the front door project is provided by the device of water air-to-air heat shields in the main and service entrances to building. The estimated temperature of the mixture of air entering the room through the door, not less than 12°C. The installation location of the air-air heat shields shown on the Plan-scheme of heating on the 1st floor.

The heating system is equipped with instrumentation for temperature and pressure. Instrumentation installed in the branch from the distribution manifold in CHP-1. See the sheets

Measures for fire and explosion safety

The pipeline at the intersection of floor slabs, interior walls and partitions padding in the sleeves of non-combustible materials or use certified sites pass Hilti.

Sealing gaps and holes at the intersections pipelines walling to provide a non-flammable materials (mineral wool), providing a standardized fire resistance crossing structures.

To ensure the standard of fire resistance of node crossing of building structures pipes made of cross linked polyethylene to use certified sites pass Hilti.

Cross fans near Emcotherm convectors installed in the floor screed is turned off by signal from fire signalization board. 

Protection against noise

The speed of the fluid in the piping adopted in accordance with mandatory Appendix E SP 60.13330.20114 subject to the requirements ERMS4.0 - not more than 1.5 m/s in pipelines DN more than 50mm and not more than 1.2 m/s - pipeline Control up to 50 mm inclusive.

Working differential pressure regulating valve does not exceed the value recommended by the manufacturer.

Energy efficiency

The project provides for automatic power reduction of the heating system in the guest rooms and meeting in the period when the premises are not used.

All the radiators are equipped with thermostatic expansion valves with thermostatic elements or actuators operated by a signal from a room thermostat or controller, which can reduce heat transfer devices by increasing the temperature above the set value.

Installation to be performed in accordance with the SP 73.13330.2012 and requirements ERMS4.0.

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