Design of ventilation systems - the principles of the detailed design

By Admin | Garden And Buildings / Communication
05 May 2016

necessary to construct the system, ensure the normal ventilation in the closed room, dictated by the requirements of construction and sanitary norms.For the normal life for labor activity and just for the health of man needs fresh air required removal "waste" air mass saturated with harmful gaseous substances, dust, bacteria and other contaminants.Properly executed ventilation design ensures perfect circulation of air flow will help shape and maintain a stable microclimate conditions are optimal for people in an enclosed space.


Rules and regulations of the organization ↑

ventilation in rooms with poor ventilation coping with the responsibilities, dramatically increasing the content of carbon dioxide in th

e air molecules, pathogens.Consequence - headaches, repetitive infections, drowsiness, excessive fatigue, in order to avoid that every person on the premises needed:

  • at least 20 m³ / h (a comfortable maximum of 60 m³ / h) of the incoming fresh air from the outside;
  • relative humidity of the air mass to 50%;
  • commit air speed of 0.50 m / s.
Ventilation and air conditioning systems
Ventilation and air conditioning systems is to provide a circuit wiring runs and in the selection of equipment, the operation of which provide regulated SNIP 2.09.04-87 standards microclimate

Professional designing HVAC systems, are closely linked to each other, an obligationmeet the above requirements, regulated SNIP.However, designers are always trying to current ventilation, slightly exceeded the statutory minimum.And the cost of exhaust air by default equivalent to enter vary depending on the destination premises, for example:

  • bathroom 50 m³ / h;
  • least for bathrooms 25 m³ / h;
  • kitchen facilities for 90 m³ / h.

All household and utility "compartments", including storage, must also be provided with ventilation.All figures airflow eventually added up, the result is the estimated extraction.Inlet and outlet air in this volume should provide a designed system.

VIDEO - good advice from experienced engineers ↑

principles of project development ↑

In fact, the design of ventilation systems is the selection of equipment and the development of methods of wiring, reasonable technical, architectural, sanitary and economic criteria.The purpose of the project - to develop a system to cope with the trouble-free delivery and discharge of the air in the calculations for an apartment or a country house this settlement amount.

  • technical side of the issue is to meet the architectural requirements.The search and selection of optimal hardware and cabling options, providing one hundred percent disabled system, possibility to troubleshoot and perform warranty service.Authors of the project have to pick up the equipment not only perfectly doing his job, but also serves as the maximum time.The basic equipment and additional equipment is chosen taking into account the category to which the room on fire and explosion hazard criteria.
Professional design of ventilation systems
draft ventilation must not only ensure the reliable operation of the system, but also to ensure free access to all technical rooms and units
  • Ventilation and air conditioning as much as possible not to disturb the architect created an "image" of the building.Contributed by installing units and ductwork should not catastrophically changes to spoil the facades and interior painting.
Design of HVAC systems should not spoil the architectural appearance of the building
Examples of arrangement of outdoor units climate systems: Right unfortunate decision left the best hidden option
  • air vent and supply of fresh clean air mass must meet the sanitary and epidemiological requirements.The designer must find a solution to the noise from the unit will not interfere with the owners and did not disturb the neighbors.
  • Also important economic aspect and the choice of the cheapest scheme, based on which you will design and installation of ventilation systems.The desire to save should not cause any loss of quality.
Design of supply and exhaust ventilation
draft ventilation is to find and develop the best option, copes with the decision of the technical, architectural, health and economic issues

usually object developed several fundamentally different options.All of these are discussed with the customer.The client compares and evaluates each of the circuits, selects the best.

Phased design specifics ↑

rationale for starting the development of a specification for the design of ventilation, which are often complementary to the task of designing the project the air conditioning system.The TOR lays account uneven distribution of temperature in the facility and in each room it is necessary to adjust the calculation of air.

calculation balance heat leakage ↑

heat gains are taken into account when calculating the internal and external heat loads.

  • The category of external loads assigned positive and negative temperature factors, which affect the occurrence of atmospheric and natural phenomena.They depend on the time of day and the season, for their determination using climatological ratios in the region.This category includes heat loss through the building construction during the cold period, the heat input into the room in direct sunlight, etc.
  • Internal loads are only positive.This heat produced by the owners, as well as instruments of lighting, heating, other appliances.

aerodynamic calculations justify the choice of ventilation equipment to help pinpoint the location for the installation of ventilation equipment and for laying tracks.

Design and installation of ventilation and air conditioning
Often, designers are trying to place the ventilation chamber outside the premises, and laying ducts hide the false ceiling

feasibility studies or the first stage of ↑

Development of a feasibility study is carried out to increase the value.In the first "integration" approach is determined by the type, number and capacity of ventilation units.This sets the preliminary cost of the planned installation.At this stage in the design of supply and exhaust ventilation and air conditioning system, you can make adjustments if a customer for some aspects of the scheme will not hold.

working draft - the final product ↑

is the detailed processing of the pre-feasibility study created.At this stage, with high accuracy calculations of ventilation, thermal discharge, selected equipment, count the number of diffusers on specific parameters.Further plans are drawn wiring and axonometric scheme, run hydraulic and aerodynamic calculations.

after obtaining the consent of the customer's set of working schemes, drawings with an explanatory note sent to the SES and fire inspection, and then all transferred to the executor permission is required.

Diagram of the ventilation system for the office
scheme forced ventilation for office: 1) Air handling unit, 2) air duct outside air intake, 3) supply air system, 4) Duct air discharge, 5) duct extraction system, 6) diffusers, 7) Exteriorlattice 8) fittings

No doubt the design of ventilation cottage or upgrade HVAC equipment of a city apartment should be carried out by specialists with appropriate education and experience in this area.However, the customer - not the last participant in the process, having the right to make changes to require rework, track way to create the project and monitor the embodiment of his ideas into practice.He needs to be, as they say, "in the subject."Information about the stages of development and specific help to the property owner time to insert a loaded word and prevent violations.