Budget forced air installation in a cottage in combination with a duct water heater. Compact air handling unit with water heater VKJET-W Air handling unit with water heater

Supply monoblock water heater installations are designed to supply fresh air from the street into the room. Before entering the room, the air is heated to the required temperature by means of a water heater.

IN air handling units with water heater for air heating, the thermal energy of the central heating system is used ( hot water). The heater can also be connected to autonomous systems heating. The heater is connected to the heat supply system through a special mixing unit with a pump. The installation with a water heater has a multi-level system of protection against overheating and freezing.

The main advantages of compact air handling units with a water heater include:

• high performance;
• minimum cost of air heating;
• operational safety.

Compact monobloc units with water heater- this is a reliable, high-performance and energy-efficient equipment that allows you to simultaneously solve two problems - to ensure the flow of fresh air into the room from the street and at the same time eliminate heat loss. Due rational use heat energy, they are especially effective when working in rooms with an area of ​​more than 120-150 sq.m. The MirCli online store offers you to purchase such installations in a wide range of presented models and at the lowest prices. If necessary, our specialists will perform professional installation of purchased ventilation equipment.

The main task of the air handling unit Climate 067W with water heater is the supply of fresh purified air into the room and the removal of exhaust air.

At the same time, the key feature of this model is that it can both heat and cool the supply air during operation due to the recuperation system with a heat pump.

The unit allows you to maintain the desired temperature in the room all year round.

The composition of the supply and exhaust ventilation unit Climate 067

1. Cassette regenerated filters class EU-4 (Germany)
2. Radial fans (Germany)
3. Rotary compressor with freon circuit (Mitsubishi Electric)
4. Electric heater (standard)
5. Energy efficient plate heat exchangers (copper-aluminum)
6. Automation and control system
7. Heat and noise insulated housing

energy efficiency

Climate 067 are among the most energy efficient. The efficiency of the recovery process in this kind of ventilation installations reaches 70%, which saves money on electricity costs.This is especially true for the climate of Russia, where the winter season lasts 7-8 months a year.

According to the experience of our research and calculations, the payback period for air handling units with recuperation, on average, is 1.5-2 years of operation. When compared with equipment that heats the supply air with electricity.

Integrated heat pump air handling unit allows most transfer heat energy from supply air to exhaust air and vice versa. The efficiency in such models reaches the point that for 1 kW of electricity consumed, you get from 3 to 6 kW of thermal energy.

Thus, the cost of electricity for the operation of the air handling unit Climate 067 decrease several times. Price of air handling unit with heat recovery Climate depends on its configuration.

Principle of operation

The supply and exhaust air passes through the unit with the help of fans. The unit has a reversible heat pump with two metal (copper) heat exchangers in each channel. During operation, depending on the mode - heating or cooling, the heat pump works in such a way that it transfers heat between the channels. Principle of operation heat pump like regular air conditioners.

Installation of the air handling unit Climate 067Installation of this series of equipment is quite simple, since the installation is almost completely assembled at the factory. The entire automation system, the reversible heat pump is already in a ready state. The entire installation process consists in installing the air handling unit on a support or hanging it from the ceiling, connecting the air ducts, connecting the external power supply and assembling the water piping assembly (for models with a water heater).

System management

The unit is equipped with a control panel, on which you can set and change any parameters of its operation. The console can be mounted in any convenient location on the wall.

The automation system of Climate 067 models is very flexible:

• Full automatic diagnostics;
• Recording mode on the controller of all changes/errors/accidents;
• Ability to connect to the dispatching system via the local network "Ethernet";
• Automatic switching of the modes "heating/cooling" on temperature sensors and settings;
• Service mode, polling sensors

The main functions of the control panel:

• Setting the temperature of the supply air to the room, taking into account the mode of heating/cooling the outdoor air;
• Clean ventilation mode (outside air supply without changing its temperature characteristics);
• Air flow regulation (5 speeds);
• Setting the on / off timer for the unit and its operation schedule by day of the week.

What is displayed on the remote control:

• Set temperature;
• Actual room temperature;
• Outdoor air temperature;
• Installation operating mode;
• Compressor operation.

Aerodynamic characteristics

Our specialists will be happy to advise you and select the installation of the required power.

Specifications

(1) - at t nar. 28°C 70% r.h. or 23.7°C wt. And t int. 22°C

(2) - at t nar. 7°C DB or 6°C wet temp. and 20°C and 40% r.h. indoor air

(3) - at t nar. 35°C 42% RH or 24°C wt. And t int. 27°C

(4) - COP (Coefficient of Performance - thermal coefficient) is equal to the ratio of heating power to power consumption.

Supply air heating for ventilation or heating systems allows to provide the necessary microclimate corresponding to sanitary requirements. Without this procedure, a fresh jet will constantly replace the warm exhaust air, bringing out thermal energy thereby reducing the efficiency of the heating system of the building. One of the main devices used to prepare supply air for supply to the ventilation system is a heater - an air flow heater that uses the energy of a carrier or converts one type into another.

A heater is a device used to heat air. According to the principle of operation, it is a heat exchanger that transfers energy from the coolant to the supply jet flow. It consists of a frame, inside which tubes are arranged in dense rows, connected in one or more lines. A coolant circulates through them - hot water or steam. The air, passing through the section of the frame, receives thermal energy from hot pipes, due to which it is transported through the ventilation system already heated, which does not create the possibility of condensation or cooling the premises.

Types of heating devices for forced ventilation

All heaters for supply ventilation can be divided into two main groups:

• using heat transfer fluid.
• Not using coolant.

The first group includes water and steam heaters, the second - electric. The fundamental difference between them is that the devices of the first group only organize the transfer of thermal energy entering them into ready-made, while the devices of the second troupe create heat inside themselves on their own. In addition, water and steam heaters are divided into lamellar, having greater efficiency, but the worst performance, and spiral-rolled, now used almost everywhere.

There are also heating devices, often included in these groups, for example, a gas heater. The burning gas heats the air flow passing through the heating zone, preparing it for use in ventilation systems or air heating. The use of such devices is not widespread, since the use of gas in industrial workshops is associated with a lot of dangers and has many restrictions.

There are also used oil heaters. The heat generated during the combustion of mining is used. For large rooms, such devices do not have sufficient power, but for small auxiliary areas they are quite suitable.

Pros and cons of using

The advantages include:

• High efficiency.
• Simplicity of the device, reliability.
• Compactness, the ability to place in small volumes.
• Unpretentiousness in maintenance (water and steam appliances practically do not need it).

The disadvantages include:

• The need for a coolant or connection to the power supply network.
• Lack of independence of work - equipment for air supply is necessary.
• The interruption of the supply of electricity or coolant means the shutdown of the system.

Both the advantages and disadvantages of the devices are due to the design and do not depend on external factors.

Types of heaters

There are several types of heaters used in different areas and conditions.

Let's take a closer look at them:

Water

The most common group of devices, characterized by high efficiency, safety and ease of operation. As a heat carrier, they use hot water coming from the central heating network, hot water supply or from their own boiler. A water heater for supply ventilation is the most convenient and economical solution allowing you to complete tasks with minimal cost for maintenance or repair. The only drawback of the device is the need to connect to the coolant supply system, which creates certain difficulties at the installation stage and prevents a quick transfer to another place.

Steam

Steam devices are complete analogues of water devices and in practice differ from them only in the type of coolant. The only difference between steam appliances is the large wall thickness of the tubes - 2 mm versus 1.5 for water ones. This is due great pressure in a system requiring reinforced channels for circulation. Otherwise, the devices are identical, have the same operating rules and requirements.

Electrical

The electric air heater for supply ventilation does not need to be supplied with coolant, since the heating source is electricity. The connection of such devices is much simpler, which makes them mobile and convenient to use, but high energy costs limit the use of this group. Most often, they are installed for local heating during one-time work, used as emergency or temporary sources of heat.

Calculation of heater power

Heater calculation produced in several stages. The following are defined in sequence:

• Thermal power.
• Determination of the size of the frontal section, selection of the finished device.
• Carrier consumption calculation.

Since the air flow rate is known from the characteristics of the ventilation system, it does not need to be calculated. The formula for determining the thermal power of the device:

Qt \u003d L Pin Cin (tin - tout)

Where Qt- thermal power of the heater.

L- air consumption (value of supply flow).

Pv- air density, tabular value, is in SNiP.

Cv- specific heat capacity of air, available in the tables of SNiP.

(tin — tout)- the difference between indoor and outdoor temperatures.

Internal temperature - sanitary standard For this room, outdoor is determined by the average value of the coldest five-day period of the year for a given region.

We determine the frontal section:

F = (L P)/ V,

Where F- frontal section.

L- air flow.

P- air density.

V- mass flow rate, taken about 3-5 kg/m2 s.

Then we find the flow rate of the coolant:

G \u003d (3.6 Qt) / Cin (tin - tout),

Where G- heat carrier consumption.

3,6 - correction factor to obtain the desired units of measurement.

Qt- thermal power of the device.

Cv- specific heat capacity of the medium.

(tin - tout)- temperature difference of the coolant at the inlet and outlet of the device.

Knowing the carrier flow rate, it is possible to determine the diameter of the piping pipes and select the necessary equipment.

Calculation example

We define thermal power at a temperature difference from -25° to +23°, with a fan capacity of 17,000 m3/h:

Qt \u003d L Pin Cin (tin - tout)= 17000 1.3 1009 (23-(-25)) = 297319 W = 297.3 kW

Front section:

F = (L P)/ V\u003d (17000 1.3) / 4 \u003d 5525 \u003d 0.55 m2.

We determine the flow rate of the coolant:

G \u003d (3.6 Qt) / Cin (tin - tout)\u003d (3.6 297.3) / 1009 (95-50) \u003d 1.58 kg / s.

According to the data obtained from the table of heaters, we select the most suitable model.

Calculation of the heating surface

The heating surface area determines the efficiency of the device. The larger it is, the higher the heat transfer coefficient, the stronger the device heats the air flow. Determined by the formula:

Fk \u003d Q / k (tav.t - tav.v)

Where Q- thermal power.

k- coefficient.

tav.t- the average temperature of the coolant (between the values ​​at the inlet and outlet of the device).

tav.v- average air temperature (outside and inside).

The obtained data are compared with the passport characteristics of the selected device. Ideally, the discrepancy between the real and calculated values ​​should be 10-20% greater than the real ones.

Features of the calculation of steam heaters

The method for calculating steam heaters is almost identical to that considered. The only difference is the formula for calculating the coolant:

G=Q/r

Where r- specific heat arising from the condensation of steam.

Self-calculation of air heaters is quite complicated and is fraught with the appearance of many errors. If you want to calculate the device, best solution will turn to specialists or use an online calculator, of which there are many on the Internet. The solution is quite simple, you just need to substitute your own data in the windows of the program and get the desired values, on the basis of which you can select ready-made devices.

Strapping methods

The heater piping is a complex of devices and elements for regulating the supply of coolant to the device. It includes the following elements:

• Pump.
• Two or three way valve.
• Measuring instruments.
• Stop valve.
• Filter.
• Bypass.

Depending on the operating conditions, these elements can be located in the immediate vicinity of the device, or at a decent distance from it. Based on the connection conditions, there are:

• Flexible harness. It is mounted on control nodes located next to the device. The installation of such harnesses is considered easier, since it makes it possible to carry out all work on threaded connections with virtually no welding required.
• Rigid binding. Used on devices that are remote from control nodes and require strong communications.

With a difference in the installation technique, both types perform the same function - they provide setting and adjustment of the operating mode of the heater.

Adjustment of the heating process

There are two ways to adjust the operating mode:

• Quantitative. Adjustment is made by changing the volume of coolant entering the device. With this method, there are sharp jumps in temperature, instability of the regime, therefore, in Lately the second type is more common.
• Qualitative. This method allows you to ensure a constant flow of coolant, which makes the operation of the device more stable and smooth. At a constant flow rate, only the temperature of the carrier changes. This is done by mixing a certain amount of colder return into the forward flow, which is controlled by a three-way valve. Such a system protects the structure from freezing.

Do-it-yourself ventilation arrangement in a private house:.

Combined boilers on wood and electricity: the optimal solution for heating a country house.

In the online store RoomKlimat you can buy high-quality ventilation and climate equipment wholesale and retail at the most favorable prices in Moscow. We offer Breezart compact air handling units with a water heater (automatic) that differ high performance And long term services. Equipment can be ordered on our website with delivery to any region of Russia.

Basic Description

Breezart ventilation units are designed for filtering, heating and supplying fresh air in small spaces: in residential buildings, cafes and restaurants, offices, warehouses. This equipment allows you to provide effective ventilation and space heating with minimal energy consumption.

Models of air handling units of this series are produced in a durable housing with a protective anti-corrosion polymer coating, with an inner layer of heat and sound insulation.

The equipment is completed with fans, water heater, air filters, a mixing unit, as well as an automation console. The water heater allows you to heat the air temperature to the specified parameters.

All models of air handling units of this series are equipped with a remote control panel with a backlit graphic display. The embedded system is equipped with all the necessary sensors, which eliminates the need for additional equipment automation.

All unit models are equipped with high quality inverter motor fans with a wide speed control range, low level noise and high efficiency.

Air handling units with water heater are the most energy efficient ventilation equipment. To perform all the functions assigned to them (including supply air heating), it takes minimal amount electricity. A water heater (or heater) uses the heat energy coming from the heating system to heat the supply air. The heater is connected to the heating system through a mixing unit with a two- or three-way valve. The choice of valve is determined by the characteristics of the heating system. A water heater can be connected both to a central heating system and to an autonomous one (in particular, to a gas boiler in own house or cottage).

Such ventilation devices are especially relevant for buildings with a limited load on the power grid. Installing an installation with a water heater is more complicated and more expensive than an installation with an electric heater, but the money spent quickly pays off due to energy savings during the operation of the equipment.

Additional advantages of operating this particular ventilation equipment are:

• compact dimensions;
• minimum noise level;
• the ability to control the fan speed;
• protection of the heat exchanger from freezing.

Equipment air handling unit with water heater includes:

• supply and exhaust fans;
• recuperator;
• heater;
• mixing unit with pump;
• grids and cleaning filters;
• duct;
• automation systems.

The choice of air handling unit is carried out according to performance (cubic meters of air per hour) and heating power.

The online store of climate equipment MirCli offers you wide choose supply and exhaust units with a water heater at minimum prices.