Вентиляция в Revit

One of the main activities of Semidion is the design of ventilation systems in Revit in buildings of various functional purposes. Ventilation project, you can order the price via feedback. Ventilation projects are widely used in the field of construction by general contractors, design and installation companies, companies of general designers and developers. We are able to satisfy the demands of the most demanding consumer, because all the proposed projects comply with modern technical solutions, norms and standards, and the wide range of products used in the project will not leave anyone indifferent. Relying on reliability and quality, our prices remain at a pleasantly low level. All products meet safety requirements/comply with quality standards/GOST standards. The use of ventilation systems in buildings for various purposes makes it possible to meet the highest requirements of the microclimate. Ventilation not only ensures the normal flow of fresh air, distribution and exchange of air, but also the removal of heat, moisture, and harmful emissions.  The correct calculation of air distributors, their placement, taking into account the distribution of air jets, allows you to achieve optimal air mobility parameters in the work area.

 The ventilation project executed in 3D in Revit together with air conditioning, electrics, sprinkler fire extinguishing and other engineering systems allows to eliminate its collisions with these systems and makes it possible to calculate the installation schedule.

Brands such as Trox and Halton allow you to build a mathematical model of air distribution in air distributors, and correctly place equipment based on the requirements of air mobility in the work area.
 Calculations of ventilation ducts can be downloaded here.  TROX has constant and variable flow VAV valves. Constant flow VAV valves operate on/off. That is, for example, during non-working hours, you can turn off the ventilation on the floor and lower the engine speed of the vent.installations. Frequency reduction is possible by 30% for normal operation of the frequency converter. Vav variable flow regulators are usually used for local exhaust systems. Minimum at night and maximum at full use.  Nodes of passage through the roof of ventilation systems, local exhaust systems, and air intake are taken into account in the tasks for AR, KR. Nodes of passage are for each diameter of the air duct (UP1-1, UP1-2, etc.). Tasks are also given for holes in walls, ceilings of air ducts over 200 diameter.  Air heating due to ventilation is calculated simply. First, the heat loss of the premises is calculated, then the air consumption in these rooms, then the temperature of the supply air is calculated using the formula: Qt= p*c*L*dt/3.6, where dt = t (supply air heating) - t vn. Simplified formula Qt=0.33*L*dt Recirculation is calculated from (no more than) 30% of the fresh air supply according to the id chart. See the diagram here. Recirculation is prohibited for use in categorized rooms with explosive dust and gases. Therefore, not only ventilation is prohibited, but also air conditioning on recirculation. CALCULATION OF AIR EXCHANGE FOR COMPRESSOR AND HARDWARE ROOMS. The calculation of air exchange for compressor and control rooms is based on the assimilation of heat surpluses from operating equipment. A 7.5 kW compressor is installed in the compressor room. Heat emissions from running electrical equipment are calculated using the formula: Q engine =N(1-nn)/nn kW, where, n is the efficiency of a running electric motor (see the table)

Q engine =7,5(1-0,84)/0,84=1,43 kW, The calculation of the volume of air removed is calculated using the formula: L= Q engine*3600/1.2/1.005/∆t, m3/h - where ∆t is the difference between the calculated indoor temperature (16 degrees) and the maximum allowable indoor temperature with the equipment running (20 degrees). L= 1.43*3600/1,2/1,005/4=1067 m3/h The project assumes a value of 1070 m3/h.  The kitchen is ventilated with air ducts of class P, sealed to avoid the spread of odors into the premises. Umbrellas can be ordered from the manufacturer Rowan. Umbrellas can be island, wall-mounted, with grease traps.  Skolkovo, the installed systems can be viewed below based on the ventilation design in Revit:

The calculation of natural ventilation is confirmed by the formulas below. Ventilation is also checked for "overturning" of the natural exhaust system.

At the 1st stage of air heating in heaters of ventilation systems, as a rule, the air is dehumidified to a minimum of 2%. It is required to humidify the air with steam or tap water. When moistened with tap water, it must be cleaned and distilled. It is also necessary to issue a task for each humidifier to the subcontractors of the VC.

It is also important to specify the slopes of the local suction ducts in the general data, since this fact may not be taken into account during installation, and if there is no information in the project, it will be considered as a slip. Ventilation of sewage treatment plants is calculated as a pool, based on the area of the sump, the heat release of the equipment and the normalized multiplicity. A backup engine, explosion-proof and corrosion-resistant, is provided for ventilation. The air ducts are made of stainless steel. The comfortable air flow rate through the gap in the door is up to 0.3 m/s according to AVOC recommendations. Ventilation of the hot workshop in  NP "AVOK" 7.3-2007 The proportion of convective heat generation of kitchen equipment Qk, W, is determined by the formula QK = QTQ, (2) where Qt is the installed capacity of kitchen equipment, kW; Kj - the proportion of apparent heat emissions from the installation capacity of kitchen equipment, W/kW, is taken according to Table A.1; Kk is the proportion of convective heat emissions from apparent heat emissions from kitchen equipment. In the absence of data for specific equipment, it is allowed to take Kk = 0.5; Ko is the coefficient of simultaneous operation of kitchen equipment, taken according to Table B.1. Radiant radiation *0.5 Pressure drop on the door: L=Fd*Z*dP^1/2*3600 where z=0.85 The gap in the door according to AVOC is 0.03m, according to SNiP 0.02 mm the speed is 0.5-1.5 m/s  (Manual for SNiP 2.08.01-89.  NP "AVOK" 5.2-2012) Calculation of the air flow per cabinet in the laboratory: The flow rate is set based on the hazard class of the substances. For the lowest class, the speed is 0.5 m/s, then 0.7 and 1m/s. We have the lowest class, because the laboratory is operated without the use of special protective equipment, the laboratory does not have vestibule locks, sanitary passes and other visible attributes of a laboratory working with dangerous substances. Therefore, we take 0.5 m/s. Next, we multiply by the cross-sectional area, which is equal to = cabinet width * 0.2 m. According to the specification, our cabinets are 1.2 m wide. Therefore, each cabinet has a flow rate: 0,5*0,2*1,2*3600 = 432 m3/hour. Ventilation scheme of a hotel room: The flow displacing into the room is 60 *2 m3/h, the exhaust from the bathroom and the compensating exhaust from the dirty area from the corridor Ventilation scheme of the hot shop: General exchange ventilation supply and exhaust, local exhaust system. Proper installation of air ducts in rooms with escape routes using the example of a hotel: clause 4.3.2, 4.3.3 of SP 1.13130 (4.3.2. The height of horizontal sections of evacuation routes in the light, as a rule, should be at least 2 m. It is allowed to reduce the specified height to 1.8 m for horizontal sections of evacuation routes, along which no more than 5 people can be evacuated (with the exception of sections that can be evacuated from Class F1 premises); 4.3.3. The width of horizontal sections of escape routes and ramps must be at least: ... 1.0 m - in all other cases.) Correct assignment of tasks for ventilation openings in walls: 1. First, holes are made in the brickwork 2. If it is impossible to finish the holes in the brickwork, the holes are made in a monolith of small sections. 3 If possible, the height of the escape route sections in the light is maintained, holes are made in the metal beams with a special calculation by the designers.