Architectural - construction and planning solutions.

The project provides for the technical re-equipment of the existing boiler house into a central heating point within the boundaries of the existing premises. The existing boiler room is located on the ground floor of a residential building. The floor level is -0,850 m. Above the boiler room there are living quarters. According to the results of the survey, the ceiling was made of reinforced concrete slabs on steel beams. The ceiling is in good working condition, it needs to be repaired. The scope of technical re-equipment includes: 1. Replacement of technological equipment. 2. Replacement of doors, windows, louvres, deflector; 3. Replacement of the existing canopy over the entrance without changing the design. 4. Dismantling of the existing floor and installation of a new floor with a polymer coating; 5. Plastering and painting of walls; 6. Painting of ceilings; 7. Replacement of internal engineering systems of the central heating premises. The nomenclature, layout and production areas of the building are designed in accordance with the terms of reference for the design while maintaining the existing load-bearing partitions. The degree of fire resistance of the central heating building is II. The category of the premises of the central heating center for explosive and fire hazards is D. The class for the functional fire hazard of the boiler room is F 5.1. In the premises of the building, self-leveling polymer floors are used with slopes to the drains of the sewerage system. The pits are covered with corrugated sheet. The interior walls and partitions of the building are finished by plastering with cement-sand mortar and subsequent painting with acrylic-water-dispersion paint. The existing chimney of the boiler house is being dismantled. Supply and exhaust ventilation in the volume of a single air exchange per 1 hour is provided in the central heating room. Supply air is supplied through a louvered grille installed in the wall of the central heating substation, installed in place of the existing grille. Air exhaust is carried out through a deflector, which is 0,6 m above the roof of the building. The deflector is placed in place of the existing deflector.

Thermal scheme.

Coolant at the input - Т1/Т2 =150/70 ºС; - available head - P1-P2 = 16,3 m.w.st. (according to hydraulic calculation); - pressure in the return pipeline - P2 = 47,7 m.w.st. (according to hydraulic calculation); Heating system coolant - Т1.1/Т2.1 = 95/70 ºС; At the inlet to the central heating station, installation is provided for: flange shut-off valves, a sump and filter, instrumentation devices, a commercial heat metering unit, and a downstream pressure regulator. The preparation of the heat carrier of the heating system is provided by a mixing unit using two circulation pumps with frequency regulation IPL 65/130-3/2 (1 working + 1 standby) installed on the return pipeline. The temperature control of the coolant according to the temperature curve is adopted by installing a 2-way control valve VUG with el. a drive before the mixing unit, as well as a temperature sensor after the mixing unit and a KONTAR MC12 controller with an outdoor air temperature sensor. Drainage from the central heating center is provided by a drainage non-pressure pipeline T96 from waste and drain pipelines to a waste well (for cooling to t = 40˚С), from where to a general sewage well. The heating system is fed from supply heat networks.

Basic equipment.

The CTP is equipped with modern thermal and mechanical equipment and valves, namely: 1. Circulation pumps with frequency regulation IL 50/170-7.5/2 from Wilo. The IPL 65/130-3/2 pumps from Wilo provide circulation, taking into account the required differential at the consumer. 2. Two-way control valve VUG 065 F304 complete with el. actuator AVN 234 S F132 and adapter MV 505902 from Sauter, which provides temperature control of the heating system coolant depending on the outdoor temperature. 3. The VFG2 pressure regulator, complete with the AFD control unit and the DANFOSS AF impulse tube, serves to maintain the pressure in the supply line constant. 4. Steel ball valves from Vexve, nickel-plated ball valves from BASIC. 5. Vertical flanged mud trap “Hydrolock” manufactured by CJSC “Santekh Komplekt”. 6. Cast iron mesh filter, flanged F3240 from Tecofi. 7. Check valves CB3440 from Tecofi. 8. Balancing cranes RC 3242 from Tecofi. To maintain the required pressure after the heating system, the consumer has a Tecofi balancing valve CB3440 installed on the return pipeline. 9. Safety valves OR.1831 from Vesta. To reduce heat losses and ensure safety requirements, thermal insulation of surfaces with temperatures above 40 ºС is provided. Temperature and pressure sensors are installed in accordance with the design assignment for data transmission to the control room. An electric heating system is provided for the premises of the central heating station.