Structural and space-planning solutions

The cooling station building is a separate building. The shape of the cooling station building is rectangular in plan. Dimensions in axes ~ 30,0x8,0 m. Building cooling stations single-span, one-story with high parapet walls 3,5 m above the roof level. Floor height - variable 3,99-3,640 m. Elevation of the main roof parapet + 4.600, elevation of the high parapet - + 7.800. On the roof, fenced with parapets, it is planned to place blocks of heat exchangers and fans of the station. The structural system of the building is frame, it is a single-span spatial frame, consisting of a reinforced concrete base slab, load-bearing metal columns of an I-section, metal beams and roof slabs. Building foundations cooling stations - a monolithic reinforced concrete slab with thickenings for the frame columns. Columns and beams of the supporting frame - steel from rolled I-sections No. 30K, No. 30V2, No. 20K. Fastening of columns to foundations is rigid on foundation bolts. The connection of beams with columns is rigid, by welding. Cover slabs - prefabricated reinforced concrete hollow core slabs with round voids 220 mm thick, laid on load-bearing metal beams. The seams between the plates are monolithic. External walls of the building cooling stations up to the level of +4.300 m are made of prefabricated reinforced concrete panels with a thickness of 150 mm. Above +4.300 - from prefabricated reinforced concrete parapet panels 120 mm thick with soundproofing properties. The panels are connected by means of spike fastening with subsequent caulking of the joints. Fastening of parapet panels is provided on the outer metal frame of the parapet by welding embedded parts to the metal corners of the frame. The internal load-bearing partition is made of prefabricated reinforced concrete wall panels 150 mm thick. The adjunction of the partition to the outer walls is carried out by means of spike fastening with subsequent caulking of the joints. The roof of the cooling station is flat, with the organization of internal drains. The slope of the roof is made of expanded clay backfill towards the catchment funnels. The roofing carpet has the following composition: reinforced concrete floor slabs; vapor barrier layer of rubber-bitumen insulation; mineral wool insulation; two layers of rubber-bitumen insulation. The concrete class of the designed foundations is B25. Fittings - class AIII (A500). In the construction of hollow core slabs, the concrete class is B30; Steel structures of rolled profiles use C235 steel according to GOST 27772-88. To protect against corrosion, all steel structures are cleaned by sandblasting and painted with primer enamels. The thickness of the paint layer of steel structures located in the interior - 0,8 mm and outside the building - 1,6 mm.

Architectural solutions

A separate building of the cooling station is provided for 2 rooms for building engineering equipment. In the technological chain of one of them - the compressor station for cooling the refrigerant for the air conditioning units of the premises of the complex, external fan heat exchangers are used, which operate around the clock and create a high level of noise. Diesel generators are located in another room, providing uninterrupted power supply to the complex in the event of a shutdown of external power supplies, during which episodic emissions of diesel fuel combustion products into the environment will occur. Functional fire hazard class of the building – F5.1 (SNiP 21-01-97*). Constructive fire hazard class - C0 (SNiP 21-01-97 *). Building responsibility level – II (SNiP 2.01.07-85*). The degree of fire resistance of the building is II (SNiP 21-01-97 *, SNiP II-35-96). Explosion and fire hazard category of the building – D, including: - cooling stations – D; - diesel generator - B. The level of the clean floor of the structure is taken as a conditional mark of 0,000. The housing in the above-ground part consists of 2 elements that are structurally independent of each other - an open metal stack for accommodating fan heat exchangers and, located inside the stack, a one-story diesel generator building and a refrigerant cooling station. The total load from both parts of the hull comes to common foundations. The adopted volumetric, architectural and structural solutions of the building are due to the need not to transfer loads from external equipment to the building structure. The building is single-span, one-story, frameless with a one-sided 5% slope of the cover. Building dimensions cooling stations in the axes - 30,0x8,0 m. The height from the mark 0.000 to the upper point of support of the inclined cover is 4 m. A parapet is provided along the perimeter of the roof. Parapet elevation + 4.600. Bearing transverse and longitudinal walls are provided from reinforced concrete panels with a thickness of 150 mm. The fastening of the panels to each other is provided on spikes with subsequent caulking of the joints. External walls are insulated according to the "ventilated facade" system with mineral wool "Isover" thickness. 120 mm with an air gap and lined with metal cassettes manufactured by Rannila. The roofing of the building is hollow reinforced concrete slabs 8 m long. - mineral wool insulation "Izover"; - 1 layers of rubber-bitumen waterproofing. The drain is internal. For the formation of valleys leading to the funnels, an opposite main slope is provided, for the formation of which, expanded clay bedding is provided. The internal space of the building is divided into 2 rooms - a refrigerant cooling station with a length of 24 m and a diesel generator station - with a length of 6 m. In the outer wall of the station opposite the compressors, there are 3 mounting openings with collapsible filling with 3-layer sandwich panels. At opposite ends of the premises there are 2 evacuation exits to the street. The diesel generator room has 2 diesel generator sets - the main and the backup. The fuel storage is underground and provided outside the building. Each unit includes fuel storage tanks. The main unit is kept warm for immediate emergency automatic activation. To supply air for the operation of the units in the opposite walls of the room, openings with filling of blinds are provided. Blinds automatically open when the units are turned on. To remove the products of combustion of fuel, a pipe is provided located outside the building. From the premises there is 1 exit directly to the street. Both rooms have alarms and equipment, incl. external, work in automatic mode. Permanent jobs are not provided. An open metal rack for placing fan heat exchangers consists of 7 H-shaped frames installed in 6 m increments and at a distance of 50 mm from the plane of the outer walls of the building. The crossbars of the frames are raised above the parapets of the building. The elevation of the top of the crossbars is 5,035 m. The height of the frames, including the free ends of the racks above the crossbars, is 7,78 m. Heat exchangers are mounted along the runs on the crossbars within the roof above the refrigerant cooling station. To protect the environment from the noise produced by fan heat exchangers, a noise barrier made of reinforced concrete panels 120 mm thick is provided along the perimeter of the roof of the entire building. The screen is installed on the outer sides of the free ends of the frame racks from the level of 4,3 m to the level of 7,78 m and at the same time serves as a fence for the roof of the building. For maintenance of equipment and roofing around the equipment, a metal lattice bypass bridge is provided. Access to the bridge is provided by an open metal staircase and through a gate in the opening in the noise barrier. The main criteria for choosing finishing materials are the technological features of the premises, durability and ease of maintenance. In the engine room of the cooling station and the room for the emergency diesel generator, epoxy self-leveling floors were made on a monolithic reinforced concrete base slab based on the technological requirements for the coating. This coating is chemically inert and has non-dusting, non-sparking and antistatic properties.