Reading 5 minutes Views 5.4k.
More recently, supply and exhaust ventilation systems using an air recuperator were used quite rarely. Later, some experts determined that such a ventilation system is just a kind of necessity. The mechanism of action of this type of ventilation is based on the principle of the recovery process (return receipt) — a procedure in which part of the heat (energy) is returned from the exhaust air for its reuse. Warm air flows, leaving the building, and contacting in the heat exchanger with a cold flow of air masses, partially warms them up. As a result, completely “exhausted” polluted air enters the outside, and not only purified, but also already heated air returns to the building.
In order to maximize the preservation of heat in the premises, with the ventilation systems used, based on the heating of cold supply air flows, special equipment is often used — recuperators for the home, placed in the units. The principle underlying the operation of some types of recuperators (for example, rotary or plate) today has gained the greatest popularity among the widest range of existing ventilation systems.
The basic principle of operation of heat exchangers
A home air recuperator is an indispensable equipment in achieving clean air at home. After all, maintaining a healthy microclimate with the help of built-in ventilation ducts, for example, in the kitchen or in the bathroom, is an almost impossible task. In this regard, the installation of various types of ventilation systems, both supply and exhaust, will help maintain the necessary balance of clean air in the house at an optimal level of humidity.
Considering also the fact that the finishing materials used during repair work are often not able to pass the required amount of air, and modern energy-saving technologies used in the arrangement of plastic window frames make the rooms practically airtight, the installation of a heat exchanger becomes the only correct solution to these problem situations. In addition to the purchased device, a plate or rotary heat exchanger can be made by hand.
In addition, it is often recommended to use it in garage ventilation systems, where excessive humidity can cause corrosive deposits on the car, and excessive gas and fuel vapor emissions will negatively affect human health, as well as the further safety of the vehicle.
The principle of operation of the system based on recuperators is quite simple. This ventilation equipment consists of a heat exchanger equipped with 2 chambers designed for the passage of exhaust and supply air flows. The air entering the chambers does not mix, and due to a significant difference in temperature, the process of heat exchange takes place — cold air masses warm up, and warm air masses cool down. In addition to equalizing the temperature parameters of the air, the condensate formed as a result of physical processes is successfully removed from the heat exchanger.
Based on this, the heat exchanger is considered to be a fairly effective device for reducing the loss of thermal energy, and saving material things during the operation of ventilation. This equipment is able to reduce up to 2/3 of the removed heat, that is, to create its secondary use in the process of one technological cycle.
Basic directions for using recuperators
Depending on its main purpose, type of construction, area of the ventilated room, place of direct installation, recuperators can be widely used in various types of ventilation systems. Among them are:
- heat exchanger for a private house — used in forced ventilation systems of a supply and exhaust sample. The basis of such a system using the heat recovery process is a ventilation unit, which is equipped with a special heat exchanger called a heat exchanger, several fans, an automation (or control) system, and filters. 2 air ducts are suitable for the ventilation unit, through which polluted air masses are removed and discharged into a special deflector located on the roof of the house. Also in systems with forced air intake, a so-called ground heat exchanger can be used, which is laid in the ground and helps to cool the air in summer and heat it in winter. At the same time, the cost of heating and air conditioning a private house is reduced by an average of 30%. The cost of equipping a house with ventilation with a built-in heat exchanger will often cost an order of magnitude more than creating a system with natural ventilation, however, installing a heat exchanger allows you to save up to a quarter of all consumed heat on heating;
- recuperator for an apartment — is the most cost-effective and advanced equipment designed for systems with mechanical ventilation, and is the key to the health of the whole family. In apartment complexes, a ventilation system is usually created on the basis of single-block units of the supply and exhaust type with the presence of rotary heat exchangers or plate heat exchangers. Such equipment reduces the cost of heating the supply air masses by 85%. This is especially true in modern conditions of energy supply deficit;
- heat exchanger for a cottage — due to the fact that supply and exhaust ventilation systems with a heat exchanger imply an increase in the total length of the air duct network, large cottages or office premises will be an ideal option for its placement, since here the level of energy savings will be especially noticeable and relevant. At the same time, in order to avoid freezing of the system, it is recommended to use rotary heat exchangers in cottage-type houses, which, according to their technical characteristics, are less prone to exposure to low temperatures;
- Pool recuperators are the cheapest, most efficient and economical way to reduce humidity. Ideally fit into existing ventilation systems. In this case, the dehumidification of the air occurs due to the supply of fresh air with a lower level of humidity. Thanks to the use of heat recovery ventilation in the air handling units, the operating costs for maintaining the pool in the winter are significantly saved. Energy savings can reach up to 60%, which makes it possible to reduce the required power level of the heater installed in the system by an average of 2.5 times. Given the high relative humidity in the pools, experts recommend using battery-type heat exchangers as the best option for this type of premises. This is due to the fact that recuperators of a rotary or plate type in such conditions are susceptible to frequent freezing and for their further operation, additional measures will be required to protect them.
In general, a recuperator for a house fully justifies itself from the economic point of view, since the effect of its installation is especially noticeable for private homeowners who independently heat their house and have to pay for every unused degree.