Ventilation in a private house - arrangement, types
Ventilation is one of the main engineering type systems in modern buildings. If in a residential building it is not yet as popular as the norms require, then in public and industrial buildings it is designed and arranged almost everywhere.
We propose to consider in more detail what types of ventilation are in a private house, and how is the classification of such systems and how do they differ from each other?
Modern ventilation systems can be of different types and depending on the purpose can be divided into several subgroups. This division is carried out according to such parameters - the direction of air traffic, the method of using air masses in motion, as well as the service area.
According to this parameter, the systems can be divided into two large groups - supply and exhaust.
There is also ventilation, as well as classification according to the factor that sets the air in motion. According to this parameter, they can be divided into those that have a natural motivation (natural), as well as with a mechanical method of motivation (forced, mechanical).
There is also a division of ventilation and its varieties differ depending on the served area. According to this principle, ventilation systems can be divided into local and general exchange. All considered types of ventilation systems can be used both separately and together in a single building or even a room.
Such systems can be classified into ductless and ducted, depending on whether they use air ducts or whether air will move in the walls or fans without connected pipes. We offer to disassemble all types and subtypes of ventilation systems in the room, how they differ and what their tasks are.
As mentioned earlier, natural ventilation system is one of the most popular types of modern systems. This type of ventilation means that the air is driven by natural factors. More precisely, it is the pressure difference between the external atmosphere and the internal volume.
For performance, care should be taken that the pressure outside is slightly less than inside. If this factor appears, then air begins to move through specially arranged ventilation channels.
A striking example of such ventilation will be the device of exhaust ducts in the walls of private and multi-storey buildings. The main positive factor in using natural ventilation is cheapness. It does not require the use of expensive equipment and the organization of connection to electricity.
Air exchange occurs by itself, but here it is required to bear in mind that its and the negative aspects of using such a system. First of all, this will depend on atmospheric parameters.
The movement of air in the channels of the natural type occurs only with a negative pressure difference, but this is not always the case. There are times when the pressure of the room is equalized inside and outside. In this case, air exchange will stop, or even vice versa, reverse draft appears.
The natural system will react very strongly to changing weather conditions and precipitation. If in frosty sunny weather the thrust is sometimes somewhat higher than the calculated one, then in the fall on a rainy day, movement of the outside air inside the room may appear.
Mechanical type of ventilation
Ventilation in the house can be carried out in another way, consider the method of forced ventilation. In it, unlike natural, electrical energy is required for air traffic. Air exchange takes place forcibly under the influence of ventilation units - supply units, exhaust units and fans.
The main driving element of such a system will be the fan.
This is a device that consists of an impeller of different types and a housing, as well as an electric motor. It drives the impeller, which is made in such a way as to capture air currents and mix them from the fan intake into the exhaust. In general, fans can be classified into two large types - centrifugal and axial. In the latter, air movement passes through the impeller perpendicular to the blades.
But in centrifugal fans, the air will move parallel to the blade, as if bending around it. Besides the fan, the forced system of the way consists of additional elements.
First of all, this will concern duct systems, because in them air will move through a network of connected air ducts (flexible and rigid), and there is also a need to use a gate valve, an air flow regulator and other elements:
A huge amount of mounting and additional materials is also used, including clamps, heaters and temperature controllers, as well as ventilation capacities.
As the name suggests, these types of ventilation systems, such as supply systems, will be designed to supply outdoor air inside the room. They can be natural as well as mechanical.By the way, the latest systems are the most common, because they make it possible to accurately control the volume of supplied air, as well as its characteristics.
But natural supply-type systems are not used very often and most often for uncontrolled air supply.
That is, they have an exhaust system that will operate according to the design parameters, and the air inflow is organized through the slots in the windows, special openings or gratings in a natural way due to the pressure difference. At the same time, the supply system can work together with the exhaust system, both of the mechanical and natural type. It should be borne in mind that both systems work in conjunction, because the volume of supply and extract air must be the same.
Such ventilation systems as exhaust are designed to remove air from the room or at least part of it.
They are natural and mechanical. If natural supply-type systems are not common, then exhaust options have been used effectively and for a long time. In housing, the main purpose of exhaust systems is to remove human waste products and other air pollutants.
First, the carbon dioxide that will form during breathing should be removed. In this case, a fairly large amount of carbon dioxide will be formed, and moreover, water vapor, as well as polluted air, should be removed from kitchens and sanitary facilities.
In industry, the exhaust system is largely designed to remove contaminants that appear during the production process.
Supply and exhaust systems + recuperation
Separately, we should talk about systems with recuperation. They are designed to save energy resources during operation. If the supply and exhaust are separately arranged when using various units and mechanisms, and such types of ventilation-type installations as supply and exhaust with recuperation, use one unit for operation, which will move both supply and exhaust air.
Placing two branches in a single device is required in order for the air currents to cross.
At the intersection, a recuperator is used, when using which heat from the extract air is transferred to the supply air.
Please note that in certain cases this helps to save up to 80% of heat and return it to the room, and not throw it out into the street.
Used for ventilation of a private house, basically a couple of types of recuperators = these are only plate (cross-flow) and rotary.
General and local ventilation
As the name implies, these types of ventilation systems, such as general exchange, will work for the entire room. They are arranged in order to supply a certain calculated amount of air and remove polluted air from the total volume of the room.
They can be comfortable (for human life) and production - this is provided by the parameters of the production process.
In contrast, local or local systems can operate on a site or even a specific area. They will be arranged for localized supply of clean air to the workplace or removal of dirty air from the place of appearance. For example, above a stove or at a welding station.
The classification and purpose of ventilation systems, which are discussed above, help you choose the ideal option for such an engineering network.
The fact is that the correct choice of parameters of the ventilation system helps to ensure the correct characteristics of the air environment in the working area or in the living room, as well as to save energy resources for the functioning of the network as a whole.
Posted By: Work Style |08, Nov 2020
Posted By: Work Style |08, Nov 2020
Posted By: Work Style |04, Nov 2020
Posted By: Work Style |05, Nov 2020
Posted By: Work Style |04, Nov 2020