Air curtain with water heating. Thermal curtains vertical water

It is not pleasant that cold air penetrates into a warm room, cooling it, because in this case it turns out that the street is heated. Not only does this create uncomfortable conditions, it also significantly affects health and wallet. This problem can be overcome with the help of a thermal curtain, which is a reliable barrier between indoor and outdoor air.

They differ in the source of heat, that is, such equipment can be electric and water. The water thermal curtain wins in terms of economy of use, since the heating element is hot water. However, this type of device, like the other, has excellent advantages, due to which it is becoming more and more popular:

1. Protecting the building from heat loss.
2. Protection against cold air, which, thanks to the curtain, cannot enter the room.
3. Creating a barrier that does not allow exhaust gases, dust and insects to penetrate from the street.
4. Equalization of the temperature gradient.
5. Protection from drafts, which has a positive effect on health.
6. Additional space heating.
7. Ability to keep the door open.
8. The ability to keep cool in hot weather.
9. Profitability, due to both less heat loss and the fact that the energy source is not electricity, but water.

Working principle and installation

The principle of operation is quite simple: a powerful fan creates a high-speed air flow, which forms an “invisible barrier”, thanks to such a system, warm air cannot leave the room, and cold air cannot enter it. The heat source of the water curtain is hot water. It turns out that for the operation of the water type of the device, central heating is needed.

Installing such equipment, of course, is difficult, but it cannot be compared with the fact that during operation the overhead costs are low, and the power is very high. The scope of water curtains mostly extends to industrial buildings that have large open openings. The device is indispensable in restaurants, shops and warehouses, that is, those in those places where the doors open very often due to the large flow of people.

Mounting is usually done above the door. Installation above the opening means that the air curtain is horizontal, and on the side of the opening - vertical. It must be remembered that the vertical curtain must be at least ¾ of the height of the opening to be protected. This is the only difference between this type of device and the horizontal one.

main element

The main element of the design is a radial fan, which is necessary to create the necessary air flow. Such a turbine must be uniform and located along the entire length of the device. It helps create an even flow. The engine is mounted on the side of it.

However, often manufacturers decide to place the engine in the center, and small turbines on its sides. The reason for this arrangement of elements is the complexity of manufacturing a turbine with a length exceeding 800 mm. How effective is this installation method? Of course, such a simplified curtain will cost less, however, there will be a "failure" in the central part of the air flow, which significantly reduces the protective properties. In addition, the heating elements will be blown unevenly, and this leads to their earlier failure.

How is the water curtain controlled?

The air curtain is accompanied by at least two switches, one of which must turn on the fan, and the other must turn on the heating elements. Heating power regulators can also be installed, which have two or three steps. Fans can be two speed. The air curtain may have a thermostat that turns off the device or heating elements when the set temperature is reached.

There is a built-in and wired remote control, it all depends on the chosen model. However, the built-in type is used on curtains that are small in size and are installed for windows and doors. This is due to the fact that the ability to reach the buttons depends on the distance. Accordingly, for water curtains, it is more rational to use remote controls that can be installed in the right place.

Sometimes there is a use of a limit switch, which is convenient in that it turns on the device only when the gate is open. It turns out that the switch starts working when opening doors or gates. Its use is very convenient in warehouses and hangars.

Curtain selection

The following factors influence the choice of an air curtain:

1. Device length.
2. Power.
3. Performance.
4. Type of instalation.
5. Control method.

We have already discussed the last two factors, now we will talk about the other three.

1. Performance. It depends on it the speed of air flow and the height of the installation. For example, take a doorway that is about one meter wide and about two meters high. In this case, the "pumping" of the curtain should be from 700 to 900 cubic meters per hour. With this performance, the air flow rate will be about 8 meters per second at the outlet of the device, and about 2 meters per second at floor level. Of course, the price of such devices is not small, therefore, devices with lower performance are used to protect small openings. Since water curtains are used more for industrial buildings, this factor cannot be saved, otherwise the efficiency will be minimal.
2. Power is also an important factor, given that the equipment can heat the air in the room, although this factor is not at all necessary. For example, let's take a building of 10 square meters, which is not heated, and the height of the ceilings is about three meters. The power required under such conditions is 1 kW. However, in this case, the building must be capital, that is, the ceiling and walls must have good thermal insulation. You should not choose a device with high power for well-heated places or even a device without a heating function. It is worth mentioning the features of the heating function: the air at the air curtain outlet will never be hot, even if the power is maximum, it will only be warm. There is an explanation for this: the heating elements have a high blowing speed.
3. Length. It can be from 600 to 2000 millimeters. A very popular length is from 800 to 1000 millimeters, such devices are installed above a standard opening, so they are not suitable for industrial facilities where water curtains are often used. How to correctly calculate the length in this case? It should be the same as the width of the opening or a little more. This is important so that the air flow completely blocks the opening and prevents cold air from entering the room.

All this information will help you choose the right water curtain, as it plays an important role in creating comfortable conditions. The installation of such equipment will indicate that caring for people is an integral part of any organization.

, General Climate , Tropic , Ballu , Sonniger Guard , Meteor .

An economical option for HVAC equipment are thermal water curtains. They protect the room from the cold, heat it and prevent the penetration of unwanted particles from the external environment. The heating element is a central heating system with hot water.

Air water curtains are mounted in residential buildings and installed in non-residential premises. Equipment can be placed:

• Above the doorway
• Above the window
• On the sides of internal floors and passages.

Kinds

Water thermal curtain is divided into the following models:

• With horizontal (vertical) mounting. These curtains are used for gates. To cover the entire opening area, it is recommended to install vertical models. They create a directional lateral airflow,
• Ceiling. To hide risers, channels and the equipment itself, products that are built into a false ceiling are suitable,
• Special design. Created in the form of a segmented body. Such models are suspended from the ceiling or placed vertically on the floor.

The Teplovent store sells products from such manufacturers as:

Design

The elements of the equipment are:

• A heating element,
• Nozzle,
• electric motor,
• Fan.

The functions of the heating element are performed by a two-way heat exchanger. It is made of copper pipes, which are equipped with lamellar aluminum fins. Through the nozzles that exit the housing, water is supplied to the heat exchanger.

Its connection to the heating network is implemented using flexible corrugated pipes. In winter, hot water may be turned off. Therefore, the devices are provided with a drain of water. The water thermal curtain, if properly installed, is free from corrosion. Its body is made of special materials. The insulation of internal elements is also made of special materials.

Operating principle

The equipment uses an air stream that is warmed by the thermal energy coming from the heat exchanger. Electricity is consumed only for the rotation of the fan and comes from a 220 V network.

The blowing of thermal curtains and heating (partial, maximum) depend on the functioning of the fan. The water curtain is controlled by a remote control.

Conclusion

You can contact us to choose the right parameters of the thermal curtain. To resolve any questions, you can contact our consultants in an online chat or call our manager by phone, which is listed on our portal.

Thermal water curtains belong to the class of climate technology. With their help, a steady directional flow of hot air is created.

The direction of the heated air jet can be vertical or horizontal (parallel or perpendicular to the floor).

The main source of thermal energy is hot water. A thermal curtain with a water source of heat can be connected to a centralized hot water supply or water heating system of a building.

Units of this type are economically advantageous to install in rooms where there is not enough electrical power.

The thermal curtain must correspond to the characteristics of the object on which it is going to be used.

The main selection criteria are:

• performance: the indicator is characterized by the volume of air passed through the thermal curtain.

For example, for installation on a doorway measuring 2x1 meter, it is necessary to use a curtain with a throughput of 800-900 cubic meters. m/hour.

If a unit of lower capacity is installed in such an opening, then only its upper zone will be heated. And through the lower part of the opening, cold air will enter the room;

• dimensions: the size of the unit must exactly correspond to the width of the opening in which it will be installed;
• centrifugal fan (turbine) length: this element must be equal in length to the length of the entire thermal curtain;
• air flow rate: for low openings, a low flow rate of heated air is sufficient.

Large openings require high speeds. Often it is necessary to mount several curtains in large openings;

• the presence of a thermostat: built into the design of the curtain, it greatly facilitates its operation, since its task is to maintain a constant temperature in automatic mode throughout the entire period of operation of the device.

By power veils are divided into:

• household: form a narrow stream of warm air. Are applied to protection of windows of booths, cash desks. Can be used in a residential area.

They are installed above window openings in order to reduce heat loss and protect against drafts. In small rooms, household curtains serve as an additional source of heating;

• medium: used in openings, the height of which does not exceed three meters. These settings are the most common.

Their task is to reduce heat loss with open doors and protect people inside the room from drafts;

• large: are used in small workshops with medium-sized doorways up to seven meters high.
• heavy duty: installed in openings up to 12 meters high. Such powerful installations are used in warehouses, production workshops, large stores.

A thermal curtain can also be used at home, but there are other solutions. An interesting option that helps solve the problem of drafts and temperature changes is a warm floor. Read a detailed article about the device, and much more, to learn about all the advantages and disadvantages of such a solution.

When extracting water from a well, a pumping station is needed to maintain a constant pressure in the system. Read everything about these devices, including the Marina pumping station, the most useful and up-to-date information.

Classification of air curtains by type of protection ^

According to the type of opening protection, air curtains are divided into:

• mixing;
• sliding.

Mixing air curtains work as follows: in the zone of their action, cold air is mixed from the street and warm air coming from the installation.

The jet pressure of such devices is small, but a high power of the heating elements is required.

Sliding installations are characterized by a high pressure of the air flow, due to which outside air does not enter the room.

Most modern models of thermal curtains can operate in both mixing and sliding modes.

Classification of thermal curtains by installation method ^

According to the installation method, the curtains are divided into:

• horizontal: mounted above the entrance into the room. The main requirement for such an installation is the effect of the device on the entire width of the opening;
• vertical: established on the sides of the opening. At the same time, the height of the thermal curtain must be at least 2/3 of the opening height;
• embedded: are placed behind the ceiling. Only the air intake and air distribution grilles remain visible. This method does not affect the power of the curtain in any way..

The device and principle of operation of a water thermal curtain ^

A thermal curtain with a water source of heat consists of:

• durable steel case with a protective coating applied to it;
• two-way water heater.

Modern air heaters are a structure made of a copper pipe with aluminum lamellar fins stacked on it.

The air heater cannot be dismantled. The coolant (hot water) enters it and is discharged from it through pipes located in the side of the structure.

The air flow is provided by axial fans. The fan motors have several speeds.

Adjustment and control of the air curtains is carried out either with the help of an external or remote control panel (depending on the brand and model of the device).

Air is taken in through the perforated panels of the housing, and ejected through a slit-like nozzle located at the bottom of the unit.

In the engine compartment of any brand of air curtain there is an earth bolt, which is connected to the terminal block by means of internal communication.

To ensure normal operation of the air curtain, a water filter must be installed at the coolant inlet.

Many models are equipped with a mixing unit that serves to control the flow rate of the coolant (and, consequently, the air temperature at the outlet of the air curtain).

The principle of operation of a water thermal curtain is no different from the operation of devices using other types of heat carriers:

The fan takes air from the room, drives it through the air heater and directs it with a powerful jet downwards (in case of horizontal installation) or sideways (in case of vertical installation).

Installation rules for water curtains ^

Before proceeding with the installation of water thermal curtains, a diagram is drawn up for connecting the installation and pipelines to the heat carrier source (central hot water supply system or boiler equipment).

The simplest circuit consists of the following elements:

• thermal curtains;
• coarse water filter;
• crane - air vent;
• shut-off valve;
• check valve;
• circulation pump (when connected to boiler equipment).

For the operation of a thermal water curtain, a constant temperature of the heat carrier is required. In a large room, a good solution can be with a capacity of tens of liters per minute. Read all about these devices in our article.

And another interesting article that describes pumps for water heating, their characteristics, prices, and so on, is located, make the right choice!

After the scheme has been drawn up, proceed to the installation.

The brackets on which the air curtain is installed are fastened evenly across the entire width of the opening, taking into account that the distance from the edge of the air curtain to the ceiling must be at least 30 cm (if the air curtain is mounted vertically, then such a distance must be maintained between it and the wall).

The brackets are attached with anchor bolts.

The thermal curtain is attached to the brackets using standard bolts.

Since the ends of the connecting pipes are at the same level, an extension cord (up to 5 cm) is installed on one of them for convenience.

A quick-disconnect connection is packed on the extension cord (designed for quick installation and dismantling of the air curtain).

Through the shut-off valves, we connect the curtain to the coolant supply-return lines.
After checking the joints for tightness using pressure gauges, the installation can be started.

When planning the heating of any room, the dew point value must be taken into account. What is it and why is it so important - read our article!

Sufficiently pure water is necessary for long-term operation of a water thermal curtain. To solve this problem, you can purchase a main filter. What filters are best? Read about it, it's interesting!

Popular brands ^

There are several well-known manufacturers of water curtains.

"Teplomash" ^

NPO Teplomash holds the leading position in the domestic production of water curtains. The enterprise produces units with power from 2 to 230 kW.

Models designed to protect small openings cost:

• 100 W power - 16350 rubles;
• With a power of 150 W - 20850 rubles.

The cost of Teplomash products designed to protect openings with a height of 3 to 5 meters is from 24 to 38 thousand rubles.

Super-powerful curtains with a jet length of 15 meters cost about 80 thousand rubles.

Tropic ^

This is another Russian company that successfully competes with other manufacturers of thermal water curtains. The cost of products of this brand is practically no different from the prices of Teplomash.

Frico ^

Swedish-made water curtains, in addition to excellent quality, also have an excellent design.

But their cost differs markedly from the cost of Russian-made devices. So, a small curtain with a capacity of 800 cubic meters. m / hour will cost the buyer 2000 euros.

ballu^

Water curtains of the Ballu brand are designed for openings of various heights - from 2.5 to 4.5 meters. All devices of this brand are universal: they can be mounted both vertically and horizontally.

Approximate cost of curtains brand Ballu:

• installation height 3.5 meters, power 11 kW - 18 thousand rubles;
• installation height 4.5 meters, power 18 kW - 2 thousand rubles.

Interior curtains designed to protect entrances to offices and other premises with high requirements for appearance are much more expensive - from 180 thousand rubles.

The thermal curtain protects the microclimate of the heated warehouse from the cold environment by generating an air barrier in front of the warehouse. Of course, such a system requires constant energy supply, but the total energy consumption of a warehouse equipped with a thermal curtain only decreases. After all, the air barrier prevents the room from cooling out, reducing the cost of heating the storage.

In addition, there are ways to reduce the energy consumption of the thermal barrier itself by optimizing how the air is heated. And a good example of such an optimized scheme is a water thermal curtain that heats up the air barrier due to the energy of the coolant circulating in the warehouse heating system.

Advantages of water-type thermal curtains

• Firstly, such curtains consume a minimum of energy, "feeding" from the thermal circuit of the warehouse heating system.
• Secondly, such curtains stabilize the temperature in the protected room, creating ideal conditions for storing the most "capricious" inventory items.
• Thirdly, water curtains not only protect, but also heat the warehouse entrance.
• Fourthly, thermal curtains eliminate the appearance of drafts, improving the working conditions of warehouse personnel.
• Fifthly, such curtains can be modified by turning from a heater into an air conditioner. Moreover, such a transformation is carried out by disconnecting the curtain circuit from the coolant circulation system in the heating system. After that, the curtain starts to work like a huge fan, conditioning both the warehouse entrance and the storage itself.

That is why the scope of water curtains can be the widest, extending from thermal shielding of the thresholds of overall warehouse openings to protecting the interior of a store or cafe from dust and insects.

How does a water heated air curtain work?

The thermal curtain with water heating works on the principle of an air convector. That is, powerful fans blow a stream of cold air - taken at floor level - through the heating circuit (outlet from the heating system). As a result, a dense jet of hot air is generated, directed parallel to the plane of the protected opening.

Moreover, the air flow of the curtain is formed by a special turbine - a radial fan that pumps air through the snail body. Therefore, water curtains are mounted either horizontally (in the lintel area) or vertically (on the side of the opening, occupying ¾ of its height).

The air curtain control unit can be either mechanical or electrified. The latter option assumes the possibility of automation of the air curtain control process. However, regardless of whether the water curtain is controlled by mechanics or electronics, this unit must regulate both the turbine speed and the heat transfer of the heating circuit.

The air curtain is started by a command from a remote or stationary control panel or a limit switch. That is, in the first case, the thermal curtain works constantly or during unloading and unloading of goods. In the second case, the start signal is the fact of opening the doors to the warehouse. Accordingly, after closing the opening, the air curtain turns off.

Choosing a water curtain for a warehouse

In the process of choosing thermal curtains, as a rule, the following criteria are used:

• Turbine dimensions (hull length).
• Device power.
• Air curtain performance
• The type of device control node.

In addition, the dimensions of the opening itself, the height of the lintel and the distance from the edge to the wall, which will determine the type of curtain (horizontal or vertical), may also have some influence in favor of choosing one or another model.

Moreover, the dimensions of the turbine must correspond either to the width (for horizontal curtains) or the height (for vertical devices) of the opening. Although usually the dimensions of the air curtain fit into the size range of 0.6-2 meters, but if the opening is wider or higher, then devices with a longer body are selected.

The air curtain power is determined by the volume of the protected premises. Moreover, if for every 25-30 cubic meters of room volume there will be at least 1 kW of thermal power, then the curtain can also be used as a heating device that heats the vestibule.

The performance of the air curtain is determined by the area of ​​the protected opening. Moreover, the main criterion for performance is the speed of the air flow. At the end (near the floor), it should be at least 2 m / s. It is this criterion that determines the power (performance) of the turbine, measured by the volume of air flow pumped in one hour. Moreover, one square meter of the opening area accounts for at least 350 m3 / hour of turbine productivity.

In a word, the choice of a curtain is a very complicated procedure. Therefore, in the absence of the practice of engineering calculations, curtains are selected according to the recommendations of manufacturers, focusing on standard models.

Popular models of water-type air curtains

Curtains of industrial type are produced by only a few manufacturers of thermal equipment. Moreover, the most prominent participants in the market of industrial thermal curtains are the companies Ballu, Teplomash, Frico, Tropic. Therefore, below in the text we will consider the popular models of water-type thermal curtains only from these brands.

Water curtains by Ballu

The Russian company Ballu offers about a dozen models of water-type thermal curtains. Moreover, the cost of industrial versions of curtains mounted in an opening up to 4.5 meters high varies between 20-35 thousand rubles (horizontal curtains) or 180-220 thousand rubles (vertical curtains).

The promising horizontal water curtains of this company include the following options:

• The Ballu BHC-H20-W45 model is a device with a heat output of 41 kW and a capacity of up to 5 thousand m3 / h, generating an air barrier of 2 x 4.5 meters. The cost of BHC-H20-W45 is 35-37 thousand rubles.
• The Ballu BHC-H10-W18 model is a device with a heat output of 18 kW and a capacity of up to 2.5 thousand m3 / h, generating a thermal barrier of 1x4.5 meters. The cost of this model is 22-23 thousand rubles.

The popular vertical water curtains of the Ballu brand include the following options:

The Ballu Stella BHC-D25-W45 model is a device with a heat output of 45 kW and a capacity of up to 5000 m3/hour. Such curtains cover a 3.5-meter opening. Moreover, they can be mounted both on the left and on the right side. And the length of the BHC-D25-W45 body is 2.5 meters! The cost of this model reaches 250 thousand rubles.

The Ballu StellaBHC-D20-W35 model is a device with a heat output of 35 kW and a capacity of up to 4700 m3/h. The height of such a curtain is 2.2 meters, and the cost is 218-220 thousand rubles.

Frico thermal water curtains

The Swedish company Frico produces both high-performance industrial-type curtains and devices for servicing commercial real estate and trading floors. Moreover, in the first segment, the following types of industrial curtains can be distinguished from the assortment of the Swedish brand:

• The Frico AR3515W model is a hidden installation device that serves an opening of 1.5x3.5 meters. Moreover, the heat transfer of this model does not exceed 23 kW, and the productivity is 1.3 thousand m3 / h. The cost of the energy-efficient air curtain AR3515W reaches 235 thousand rubles.
• The Frico AGIN4WH model is a mixed-type installation device (both vertical and horizontal installation is possible), serving an opening with dimensions of 2.5x6 meters. Moreover, the heat transfer of such an installation reaches 90 kW. And the productivity is up to 14 thousand m3/hour. The cost of AGIN4WN is 627-628 thousand rubles.

• The Frico ADCSV25WL model is a device with a mixed power circuit for the heating circuit (water and electric heating), generating a barrier with dimensions of 2.5x3.5 meters. Moreover, ADCSV25WL is mounted only vertically. The heat output of this model is 52 kW, and the productivity is up to 2000 m3/hour. The cost of the ADCSV25WL model is 568-570 thousand rubles.

In a word, the Frico brand has quite interesting solutions that demonstrate enviable energy efficiency and the versatility of the installation process. But Swedish curtains will not be cheap - the cost of industrial models reaches 1.5 million rubles.

Domestic curtains of Teplomash company

Thermal curtains of the Russian enterprise "Teplomash" can be distinguished both due to performance and due to the attractive exterior of the case. Moreover, the curtains "Teplomash" will cost no more than 30-80 thousand rubles. And among the promising models, it is worth highlighting the following devices:

• Vertical air curtain Teplomash KEV-52P6140W serving an opening with a height of up to 3.5 meters. The heat output of such an installation reaches 28 kW, and the productivity is up to 2.4 thousand m3 / h. Moreover, the height of the column of such a curtain is 2 meters, and the cost is 58 thousand rubles.
• Moisture-resistant curtain Teplomash KEV-100P4060W designed to protect the gates of car washes. Moreover, the height of the opening protected by the KEV-100P4060W reaches 5 meters. The heat transfer of such a curtain is 56 kW, and the productivity is 6.2 thousand m3/hour. The cost of this model reaches 63-64 thousand rubles.
• Industrial curtain Teplomash KEV-170P7011W, which can block the entrance to the depot, warehouse, garage, with an opening height of up to 7 meters. The heat transfer of such a curtain is 89 kW, the productivity is 9800 m3/hour. However, the price of the industrial version of the KEV-170P7011W does not exceed 58-60 thousand rubles.

And the Teplomash brand also has very presentable and productive horizontal curtains with illumination, designed to serve the openings of shops, shopping centers, cafes, restaurants.

Thermal curtains brand Tropic

This manufacturer produces a whole series of water-type air curtains - "Tropic X". But not every model from this series belongs to the industrial segment of this equipment. And if you sort through the entire model range of the Tropic X series, then only three installations can be attributed to the segment of industrial equipment, namely:

• Model Tropic X432W, with which you can protect even a 5-meter opening. Moreover, the performance of this curtain is 5,000 m3/hour, and the heat transfer is 32 kW. Moreover, this particular model has a high degree of moisture protection. Therefore X432W can be installed at the entrance to a car wash. The cost of this model is 71 thousand rubles.
• Model Tropic T224W, with which you can protect the opening with a height of up to 3.5 meters. Heat transfer T224W reaches 24 kW. And the productivity is up to 2600 m3/hour. Such veils can protect the threshold of a warehouse or workshop. The cost of T224W is 42 thousand rubles.
• The Tropic X540W is designed to protect warehouses and work in the humid environment of a car wash. Moreover, the height of the opening protected by the X540W reaches 5 meters, and the heat transfer of this model is 40 kW. The performance of this thermal curtain is 6600 m3/h, and the air velocity at the outlet of the nozzle is 16 m/s. That is, using the X540W, you can protect the room from the cold, and from dust, and from exhaust gases blown out by a dense stream of warm air. The cost of the X540W is 67-68 thousand rubles.

As a result, despite the limited assortment, the Tropic X series demonstrates quite decent functionality and performance, which can be purchased for a reasonable price.

Thermal air curtains are designed to clearly separate air zones where different temperatures are required, using a narrowly directed air flow. Such installations are used in various premises to create and maintain conditions of climatic comfort.

Depending on the source of energy used to heat the coolant, there are separating devices of the following types:

• water;
• electrical.

Water thermal curtains are climatic devices that create a narrow high-speed air stream to separate two different temperature areas. Mounting a thermal device above a door or window block creates a powerful air barrier that maintains the required temperature in the room when windows or doors are opened.

Heated water from central or autonomous water supply systems is supplied to water thermal curtains as a source of thermal energy. The specified optimum temperature of heated water is set by a special regulator. The climatic household appliance has an additional function that provides effective ventilation without heating by using a built-in single-phase electric motor with a speed control.