【 Weak current College 】 smoke ventilation audit diagram elements

Residential building ventilation: smoke,

A type of construction, over 32 m in the second category of buildings (other than residential unit and tonglangshi) should fortification smoke staircase. 19 layer and above storeyed, 12 layer and above tonglangshi residential smoke stairs should be fortified.

Smoke in front of the stairs and elevator room, fire and combined with former room facilities should be fortified smoke. Total area of greater than 200 m2 or a room area is greater than 50 sqm and often some people stay or fuel more basement. Basement has a length greater than 20M evacuation should smoke within the aisle. Set mechanical smoke extraction should be located in the basement of the air supply systems, exhaust air volume of not less than the premium volume of 50%. Smoke exhaust facilities should be conducted with natural ventilation for smoke and smoke. When the natural ventilation system does not meet the requirements for mechanical smoke and smoke.

Smoke from the exhaust port in the most distant points of horizontal distance shall not exceed 30 metres, two exhaust mouth should not be greater than the distance between 60 meters. smoke staircase and vestibule, fire the elevator room and combined with former room should be set independent mechanical pressurization smoke control facilities. Mechanical pressurization smoke control facilities of the air flow, pressure should be determined by the calculation of the regulatory requirements. But when the smoke has a staircase is equipped with mechanical pressurization of independent front room open flue facilities. Smoke control in high-rise construction stair supply outlet every 2 ~ 3 tier one, non-tall buildings smoke stair supply outlet at intervals of 1 ~ 2 tier one. General use since the vertical louver 600X400, former room and combined with former rooms on each floor a diffuser.

Smoke staircases and combined with former Chamber of mechanical pressurization system should be set separately. Scissors stairs can be combined with a duct, the wind shall be adjusted according to the edition of two staircases air flow calculation, supply outlet set. Tower residential sets a scissors stairs before the Chamber should set the pressurization system.

Mechanical pressurization smoke control facilities of the air flow: exhaust fan burden smoke partition: ¡ý 60M3/h m2 more than two: ¡ý 120M3/h maximum flue gas volume meters: 60000M3/h minimum exhaust gas volume: 7200M3/h smoke staircase (front rooms are not air) of pressurized air supply: 20 layers: 25000 ~ 30000M3/h20 ~ 32 layers: 35000 ~ 40000M3/h smoke staircases and combined with former room air pressure difference: 20 layers: smoke staircase 16000 ~ 20000M3/h with former room 12000 ~ 16000M3/h20 ~ 32 layers: smoke staircase 20000 ~ 25000M3/h with former room 18000 ~ 22000M3/h fire lift front room of pressurized air supply: (upper floors before the Chamber does not need to set up mechanical pressurization, basement room available from smoke floor shave between more than through the pressure valve to maintain the former room 600x200 pressure) £ ¼ 20 layers: 15000 ~ 20000M3/h20 ~ 32 layers 22000 ~ 27000M3/h Note: air data between each compression a double door, when the single door, its air * 0. 75. Two double door, air flow rate * 1. 5 ~ 1. 75.

Smoke staircase with natural gas, its former room/share before pressurization air flow: 20 layers: 22000 ~ 27000M3/h20 ~ 32 layers: 28000 ~ 32000M3/h Note: air data compression according to each one between 2.0x1.6 double door, when the single door, its air X0. 75. Two double door, its air X1. 5 ~ 1. 75. Central Hall Office volume in the exhaust system: "1700M3, six times per hour ventilation calculation. Central Hall volume ≥ 1700M3, press 4 times per hour, but the ventilation must not be less than the 102000M3/H.

Metal exhaust duct wall thickness: wind Daoist priest variable edge "450mm: 0.5mm; 450 ~ 740: 0.6mm; 750 ~ 1500: 0.8mm; 1500 ~ 2000: 1.0mm. Need for mechanical smoke extraction facilities and building height not exceeding 6 m in parts, should divide the smoke partition. Each smoke partition area should not exceed 500 m2. Smoke partition should not be cross fire partitions. Set mechanical smoke extraction facilities of the site, the amount of exhaust smoke exhaust fan should be consistent with the normative requirements.

Mechanical smoke extraction system should correspond with the fire district. Landscape through the exhaust pipe fire compartment in the crossing should automatically close of 280 degrees centigrade fire dampers, vertical cross fire partitions of exhaust pipes should be set within the tube.

Set mechanical smoke extraction system, should have the wind in the basement. Fill the air volume of not less than 50% of the amount of exhaust smoke, wind path of air resistance is not greater than when using natural 50PA wind window, or wind machine should be used.

Outdoor exhaust vents and outdoor repair outlet horizontal distance not less than 10 meters, the vertical distance not less than 3 metres and invigorating air inlet and exhaust vents should be lower. Indoor normally closed exhaust vents, air intake can automatically turn on, it should also be set manually opening device.

Mechanical smoke extraction system, exhaust valve and exhaust vents should be smoke partition settings. Exhaust vents should be set in the ceiling or wall near the ceiling. Exhaust outlet from the smoke partition farthest point level should not exceed 30 m. Exhaust vents, exhaust valve chain with the exhaust fan.

Exhaust fan should consider 10% ~ 20% of the amount of air leakage. Wind pressure calculation according to the most negative loop. Exhaust fan inlet should have 280 degrees centigrade fire dampers and smoke exhaust fan chain. Exhaust fan, fan yishe in the engine room. Smoke exhaust pipelines generally should not be crossing the front room, stairs. Mechanical air supply pipe, exhaust pipes, exhaust vents, air winds should meet: metal duct: ¨q 20M/S non-metallic duct: ¨q 15M/S exhaust mouth ¨q 10M/S air ¨q 7M/S. Mechanical smoke extraction system should and ventilation, air conditioning with separate settings to the Tuyere, duct, fans should meet the requirements of the exhaust system. Fires should be able to automatically shut down and smoke-independent ventilation, air conditioning system. Ventilation, air conditioning system with air duct through fire District Office, passing through the engine room partition wallOffices, floors, cross joints on both sides and deformation of horizontal wind pipe and vertical wind pipe junction of the horizontal wind pipe should be set on fire dampers 70 ℃. Fire damper within 2 m on both sides of the duct and insulation materials for otherwise. Garage, gas meters, power transformation and distribution, and other flammable, explosive substances in the room, the ventilation system should be set independently. Garage exhaust:

Underground garage in the area of more than 2000 square meters, it should be set mechanical smoke extraction system. Each smoke partitions of the building area is not more than 2000 square meters. ACH/h is not less than 6 times. No direct path to outdoor car evacuation of the fire prevention Division, when setting the exhaust system shall be set at no less than 50% of the amount of exhaust smoke wind system. Exhaust vents, ducts, air blower, ibid.

Electrical and equipment room ventilation:

Conditions give priority to the use of natural ventilation. Use of mechanical ventilation, ventilation capacity according to device calorific values, allows the calculation to determine the temperature and humidity should fill the air.

Bathroom: toilet ACH not less than 10/H, toilet ACH/H is not less than 5 times.

Garage: when the distribution of available open window or an open vehicle entrances, mechanical ventilation, natural inlet of the ventilation system. You should also set the machine into the exhaust system.

Ventilation exhaust volume: residential building-story garage press 4 times the number of ventilators,/h or 300m3/h. Ventilation of the air flow: exhaust volume of 80%. In order to adapt to changes in ventilation load, the fan should be used in multiple parallel or inverter fan.

Duct and fan: fan air volume to calculate the air leakage rate plus 10%. Wind pressure for the system total pressure plus 10% of added value.

Ventilation of the engine room and accommodation, classroom, etc. Fan should be installed in Venetian style or petal-type control valve to adjust air volume and air pressure.

The segment of air duct pressure should be balanced, the parallel branch pipe of the pressure difference between allowing no more than 15%, you should set the control valve.

Noise and vibration: set in the basement ventilation room, the engine noise less than 80db, floors in wind room, the engine noise less than 70db. Ceiling fan use Spring hanger, fan and export and wind pipes canvas soft connector.

Outdoor network: outdoor heating hot water pipe with buried pipe, elbow pipe 6 ~ 12 meters, the nominal diameter DN25 ~ DN800, coat with high density polyethylene, 2 ~ 8 mm wall thickness. Insulation layer polyurethane rigid plastic, thickness 27 ~ 35 mm.

Selection: 1 in the pipeline, DN ¡ü 150, medium temperature ≤ is 200 degrees centigrade, nominal pressure ¡ü1 .0MPa, optional water pipe or steel pipe. Nominal pressure gravity(25℃) > 1.0Mpa or medium temperature gravity(25℃) > 200 ℃, should use seamless steel pipe. 2, DN = 200 ~ 500, medium temperature ≤ 450 ℃, nominal pressure ≤ 1.6Mpa, optional spiral seam steel pipe or steel pipe. Otherwise the only seamless.

Gas design:

Large municipal gas pressure in the pressure A (0.4 ~ 0.2MPA), pressure regulating station/box surge, for boiler room pressure for MV B (18KPA), pressure regulating station/tank pressure regulator, for residential pressure is low (¡ü 10KPA, usually 2KPA).

To save cost, should, as far as possible, adopt the surge tank.

Indoor express Pack gas pipes: pipes using hot-dip galvanized steel pipe, thread connection. Introduction of pipes and underground, semi basement and sealed room, seamless steel tubes in tube well. Introducing dry tube not in the bedroom, bathroom, toilet, various types of rooms, flue duct, smoke stairwells, Elevator, etc. Indoor pipes should try to rely on corner layout, the pipeline must not interfere with the exhaust outlet, blocking window opening, use and other electric equipment.