VIP exclusive HVAC construction scheme of building 1 # in a residential area in Beijing
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No. Item Content 1 Project Name XXX Economically Affordable Housing (Bid Section I) 1 # Building 2 Project Address XXX Road, Haidian District 3 Construction Unit XXXXX Work Leading Group Office 4 Design Unit XXXX Institute 5 Content Smoke Control, Air Supply and Exhaust VRV air conditioning and heating 6 Construction period: February 7, 2007 to June 30, 2008 2.2 Overview of building design No. Project content 1 Main functions of the building are office and housing 3 Construction area Total construction area (m2): 26948 4 Number of floors on the ground: 21 floors, 3 underground floors, 5 building floors, high ground floor height (m): 3.3 meters for the first floor and the second floor, 4.2 meters for the third floor, and 2.9 meters for the fourth to twentieth floor, The 21st floor is 3.0m high. The basement height: 3.5m for the first floor, 3.8m for the second floor, 3.8m for the third floor. 6 The absolute elevation of the building height (m): 63.40. The indoor and outdoor height difference (m): 1.2 7. Structural form, frame shear support, 2.3. Overview of ventilation and air conditioning works, 2.3.1. Overview of ventilation works, 2.3.1.1. The office and residential parts of the project are equipped with an exhaust fan in the distribution room on the first floor underground and the weak current machine room on the first floor underground, It is used to remove the waste heat in the machine room; One exhaust fan is set in the small dining room on the first floor, the property office on the west side of the first floor, the weak current machine room, the hall, the storage room and other places for air exchange; The public toilets on each floor from the first floor to the third floor are equipped with exhaust fans for ventilation; Exhaust fans are set respectively in the toilet on the west side of the first floor and the heat exchange room on the second floor underground for ventilation. The office on the first floor is equipped with heat exchange fresh air units for ventilation and air exchange in the office area. The kitchen ventilation and smoke exhaust shall be constructed according to the secondary design after Party A selects the kitchen appliance manufacturer through bidding. The project is equipped with smoke control system and mechanical smoke exhaust system. There are independent external windows on the ground of all smoke proof staircases, and the total area of openable external windows on every five floors is more than 2.00 square meters. Natural ventilation is adopted, and mechanical pressurized air supply is not provided. All rooms on the first and second floors of the basement have openable external windows, so natural ventilation is adopted without additional mechanical smoke exhaust system. The elevator lobby does not have natural smoke exhaust conditions, and is designed as a smoke control system with mechanical pressurized air supply. Namely, each floor is equipped with normally closed multi leaf air supply outlets (except the first, second and third floors underground), and the roof is equipped with three sets of pressurized air supply fans. The underground part of the smoke control staircase has no external windows and window shafts that can be opened, and does not have natural smoke exhaust conditions. It is designed as a smoke control system with mechanical pressurized air supply. That is to say, a vertical louver air outlet is set on each underground stair platform, and three sets of pressurized air supply fans are set on the roof of the podium. When the smoke detector detects a fire, the fire control center controls to turn on the pressurized air supply fan, and the pressurized air supply fan starts to operate. The front room of the stairwell of the podium located in the northwest has no external windows that can be opened and does not have natural smoke exhaust conditions, so it is designed as a smoke control system with mechanical pressurized air supply. That is to say, a normally closed multi leaf air supply outlet is set on each floor (the first floor, the first floor, the second floor and the third floor underground), and a pressurized air supply fan is set on the roof of the podium. If the length of the inner walkway on the east and west sides of the underground third floor is more than 20 meters, two smoke exhaust fans and two make-up fans are set according to the fire compartment. When the smoke detector detects a fire, the fire center controls to start the smoke exhaust fan and the make-up fan at the same time. When the smoke exhaust temperature exceeds 280 ℃, the fire damper shall be closed and the fan shall be interlocked and stopped. The length of the inner walkway on the west side of the basement is more than 20 meters, and a smoke exhaust fan is set according to the fire compartment. When the smoke detector detects a fire, the fire control center controls to turn on the smoke exhaust fan, and the system makes up air naturally through the window shaft. When the smoke temperature exceeds 280 ℃, the smoke exhaust fire damper of the smoke exhaust fan is closed, and the fan is interlocked to stop operation. The ventilation pipe of the ventilation system shall be made of galvanized steel plate, and the flexible joint shall be made of non combustible materials. Fire damper shall be added at the place where the air pipe passes through the fire compartment, and the gap shall be filled with non combustible materials. The air duct connected to the fresh air ventilator shall be insulated. 2.3.2 Overview of air conditioning engineering design The office part of the project is designed as a variable refrigerant flow multi connected and multi controlled split air conditioning system. The indoor unit is designed as a ceiling embedded fan coil with four air outlets, and the coil has its own condensate pump. Four outdoor units are installed on the roof of the podium on the second floor. The refrigerant pipeline of the air conditioning part shall be laid by the air conditioning manufacturer according to. The condensate system is designed to be connected with hot galvanized pipe threads. 2.3.3 Overview of heating project design The heating medium of this project is 80~60 ℃ hot water, which comes from the heating station on the third floor underground of the central garage. The residential part of the building adopts the down supply and down return double pipe heating system, which is divided into high and low areas according to the number of floors, namely, the fourth to tenth floors are low areas, and the eleventh to twenty-first floors are high areas. Each unit is provided with high and low zone risers, which are located in the pipe shaft in the elevator lobby. The main pipe is laid on the second floor underground, and the heating main pipe and the unit main riser are all differential systems. The entrance device is set on the horizontal pipe section of the third floor underground in the low area according to the method in page 68 of the 91SB1-1 atlas. Two households on each floor are equipped with heat meters. The heat meters and heat meter lock valves are located in the tube wells. The horizontal heating pipes from the tube wells to each household and each household are polybutylene (PB) pipes, filled with 40mm thick composite silicate plastic tanks for insulation, and laid underground. The indoor heating system is a double pipe system with the same program. Each group of radiators is equipped with temperature control valves. The main standpipe is distributed to the heat meter components of the horizontal branch pipes for water supply and return of each household. The office part of the project adopts the down supply and down return single pipe return system, which is divided into two systems, A and B. The water supply and return main pipes of each system are laid under the roof of the second underground floor. The main water supply and return pipe, the main riser of each unit and the riser are seamless steel pipes. The main water supply and return pipe and the main riser of each unit must be insulated. The insulation material is superfine glass wool, and the thickness of the insulation layer is 40mm. The heating pipes located in unheated rooms shall be insulated with rubber and plastic insulation cotton. The radiator of the residential part of the building is made of anti-corrosion aluminum; The office part adopts steel tubular column radiator, which is installed on the wall. 2.3.4 Features and key construction points of ventilation and air conditioning project 2.3.4.1 Project characteristics 2.3.4.1.1 Multi connected and multi controlled air conditioners are adopted: the project adopts multi connected and multi controlled air conditioners, which fully shows the flexibility of its air conditioning system. This type of air conditioner can be controlled both centrally and separately, which is convenient and reliable to operate. 2.3.4.1.2 Selection of energy-saving ventilation equipment: the ventilation equipment on the first floor adopts the heat exchange fresh air ventilation unit, which fully reflects the energy-saving requirements of modern buildings. 2.3.4.1.3 Indoor heating pipes shall be buried for decoration. 2.3.4.1.4 Some professional works of the garage shall be disconnected according to Party A's requirements, and the ventilation works cannot form a system. 2.3.4.2 Key points of construction 2.3.4.2.1 Avoid collision of pipelines of various disciplines: heating, water supply and return pipes and trunking on the second underground floor; Before the installation of the exhaust pipe and drainage pipe in the toilet, a comprehensive pipe layout should be drawn, and the elevation of each professional pipe should be constructed according to the comprehensive layout. 2.3.4.2.2 Avoid no maintenance space after the installation of ceiling type units: the plane layout of ceiling type heat exchange fresh air units shall be based on the actual site conditions and maintenance space. 2.3.4.2.3 Prevent condensate water from condensate pipes and refrigerant pipes: the insulation of condensate pipes and refrigerant pipes shall be carried out in strict accordance with the construction process to prevent the cracking of the insulation layer from generating condensate water. 2.3.4.2.4 PB heating pipes are laid in the floor. 2.3.4.2.5 Smoke control system commissioning.
