The health, well-being of people and the efficiency of their work is directly dependent on the indoor climate. BELIMO solutions for rooms and systems - a complete range of products for energy-saving climate control in zones and individual rooms of industrial and civil buildings - prove their advantages in a huge number of projects around the world.
VAV systems are:
individual regulation of air parameters in separate rooms;
the ability to use motion sensors, CO2 sensors, time relays and manual controllers to change the air flow;
reducing the cost of production and installation of the air duct network, and reducing the cost of air preparation equipment;
reduction in electricity consumption; simplification of the process of starting and setting up the ventilation network;
the possibility of continuous monitoring of the amount of air in individual branches of the network of air channels;
the possibility of centralized control of the air flow in the unit;
the possibility of retrofitting the ventilation system in relation to new conditions.
VAV - compact - efficient room climate control with one device
Actuator, regulator and sensor in one unit - VAV-compact provides an economical way to control variable and constant airflows in office buildings, hotels, hospitals, etc. Special rotary actuators with torques of 5, 10 and 20 Nm and linear actuators of 150 Nm can be installed on VAV/CAV valves in a wide range of sizes. VAV compact controllers are controlled as traditional way, and through the BELIMO MP-bus network. MP models can be integrated into systems over high level– together with one sensor per device - either via a DDC controller with an integrated MP interface, or via a gateway. Fans are connected via Mp-bus to the Fan Optimizer, which greatly simplifies the process of optimizing energy consumption depending on the needs
VAV - universal - flexibility in case of problematic environment
The range of ready-to-connect VAV-universal devices includes rotary and security actuators, as well as regulators with dynamic and static pressure sensors. These devices can be customized to the precise requirements of specific industrial, commercial and public buildings. VRP-M digital self-tuning controllers interface with quick response motor drives in laboratories or industrial premises with a polluted atmosphere, providing an instant supply of fresh air. Depending on the specific choice, the automation system can be integrated into a higher level network and equipped – directly or via the MP-bus network – with the BELIMO fan optimizer, which allows to reduce up to 50% of the electric power consumed by the fan
The goods are delivered on a prepaid basis.
Optima VAV-regulators ensure that the required amount of air is supplied to each room, i.e. adjust the air flow as needed. Such a regulator is a device that combines a VAV controller, a dynamic differential pressure converter, an electric actuator and the valve itself.
Variable air flow controllers (VAV) are used for supply and exhaust air in low pressure ventilation systems. The units are ideal for single zone supply and exhaust control in master and slave mode. The VAV ventilation system is the best solution for office and retail buildings, hotels, hospitals and other public buildings. In air conditioning systems where it is necessary to maintain a particularly precise air pressure difference (operating rooms, workshops, laboratories, etc.), the use of VAV systems will also be optimal.
Main technical characteristics:
- Damper tightness class - 4 (according to EN 175)
- Casing tightness class - C (according to EN 1751)
- Hygienic ILH certificates VDI 3803 and VDI 6022 for hospital applications and standard climate systems
High level of accuracy:
- 10-20% of the maximum terminal operating limit Vmax gives a systematic error of ±25%
- 20-40% of the maximum operating limit of the terminal Vmax gives a systematic error of ˂±10%
- 40-100% of the maximum operating limit of the terminal Vmax gives a systematic error of ˂±4%
- Air speed from 2 to 13 m/s
- Air flow from 36 to 14589 m3/h
- Works with pressure differences up to 1000 Pa (max. 1500 Pa)
- OPTIMA-R-I has a noise and heat insulating layer (50mm)
The body of the regulator is made of galvanized steel sheet. The special design of the multi-position differential pressure sensor allows you to obtain accurate data even in complex systems.
Inlet/outlet: ø 80 to ø 630 mm
Optima variable air flow controllers are fitted as standard (BLC1) with a compact Belimo controller with MP-Bus communication capability (LMV-D3 or NMV-D3) for single or master/slave operation. Also, complete with special compact controllers, Optima controllers can be integrated into the ModBus and LONWork networks, and with the help of a gateway you can work using the BACnet protocol. The air flow parameters are set using a special Belimo ZTH-GEN programmer. Compact controllers are calibrated as standard or to individual Vmin and Vmax parameters (specified in the order) at the factory before shipment.
*BLC1 = Belimo LMV-D3 compact controller with MP-Bus communication
BLC4 = compact controller Belimo LMV-D3 without communication
BLC1-MOD = Belimo LMV-D3 compact controller with MODBUS communication
* - standard delivery
Variable Air Volume - variable air flow
SYSTEMAGROUP specialists have implemented more than one project with using VAV ventilation and air conditioning systems both at the stage of design and installation and modernization of existing systems.
Advantages of VAV - variable flow systems over CAV - constant air flow systems:
- Individual comfort in every room- the organization of air supply is carried out on demand from a certain external factor or their sum and priority: temperature t, humidity, CO2, movement.
- Energy saving- maximum energy efficiency, allows you to save up to 70% of electricity consumption.
- Increases the service life of the equipment
- Low noise system operation
Let's consider three examples, from the objects we have implemented, of the layout of VAV systems from advanced to simple.
In all three examples, air handling units with recuperation are used. The ventilation system control mode is carried out by maintaining the temperature t of the exhaust air (maintaining the temperature in the room). The ventilation system controller itself sets the supply air temperature t (tmin and tmax).
1. Example
The task set by the Customer is to individually maintain accurate and continuous control of humidity and temperature t in each of the six living quarters: four bedrooms, a hall, a dining room.
In this project, it was required to regulate six zones, the principle of operation of the system was implemented on OPTIMA variable air flow VAV controllers and an optimizer controller.
The air flow in a given VAV system is independent of the pressure in that system.
- Variable flow VAV controllers receive a control signal (0/2-10V) from humidity and temperature sensors installed in the premises - Vx m3/h is required.
- The moving air stream creates a pressure difference, which is measured using a Pitot tube.
- The actual air flow rate m3/h obtained from the differential pressure sensor is sent to the variable flow controller
- The controller compares the actual air flow m3/h. and the required value, in the presence of deviations, sends a corrective signal to the electric actuator, which regulates the valve section until the required air flow m3 / h. will not be reached
- The optimizer controller receives a signal via the MP-bus network from all VAV controllers and corrects the operation of the fans.
- Topvex TR_EL - vertical air handling unit with rotary heat exchanger and electric heater
- AIAS COMBOX MODULE - controller optimizer VAV variable flow regulators
- CO2RT Wall mounting 0-2000 ppm - CO2 level, humidity and temperature transmitters
- OPTIMA-R-BLC1 - variable flow controllers
- Mitsubishi Electric SUZ-KA_ inverter - condensing unit (KKB)
- DXRE - freon cooler
- PAC-IF012B-E - KKB controller
- Carel compactSteam is an isothermal humidifier.
2. Example
The task set by the Customer is to maintain accurate and continuous control of CO2 concentration and temperature t and in two gyms.
In this project, it was required to regulate two zones, the principle of operation was implemented according to the scheme - The air flow in this VAV system depends on the static pressure Pa in this system.
- Electric drives air valves receive a control signal (0/2-10V) from CO2 concentration and temperature sensors installed in sports halls
- The air valve, by changing the section, delivers the required air flow m3/h.
- The moving air flow creates a differential pressure Pa, which is measured by differential pressure sensors
- Differential pressure sensors send a signal to the controller of the air handling unit, which in turn adjusts the operation of the fans depending on the current demand for air flow m3/h.
Equipment installed at the facility:
- Topvex FR_HWL - horizontal air handling unit with rotary heat exchanger and water heater
- VAV Duct pressure control - differential pressure sensors
- Belimo LF 24-SR - electric actuators 0-10V controlled by CO2 level converters
- DXRE - freon cooler
- PAC-IF013B-E - KKB controller.
3. Example
The task set by the Customer is to maintain accurate and continuous temperature control t in the office space.
In this project, it was required to ensure the temperature of a single office space (call center). The principle of operation of the system is implemented according to the scheme of the Corrigo ventilation system controlled directly by the controller. The settings of the Corrigo controller allow you to change the airflow m3/h. depending on the temperature deviation t in the room.
Equipment installed at the facility:
- Topvex FC_EL - suspended air handling unit with heat exchanger and electric heater
- DXRE - freon cooler
- Mitsubishi Electric PUHZ-ZRP_YKA inverter - condensing unit (KKB)
- PAC-IF013B-E - KKB controller
Description:
Mounting:
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Variable air flow VAV The price of the goods will be specified by the manager |
Description:
In complex ventilation systems, each change in the position of the damper in one of the rooms leads to a difference in flow (pressure) in neighboring rooms. The best way to prevent this problem is to use VAV regulators and pressure regulators if you want to keep a constant pressure difference in adjacent zones. The use of such systems allows to reduce energy costs by optimizing the operation of climate systems. Moreover, such systems modern systems controls can react to changes in loads, such as thermal loads, in certain areas of the house, which makes them more flexible. Systems built on the basis of VAV regulators have the possibility of subsequent adaptation and modification of existing solutions.
Mounting:
In order to ensure the correct functioning of the installation, it is recommended to follow the following principles when mounting the regulators:
Length of the straight cut in front of the 2D slider
Straight cut length behind 1D regulator
The air flow regulator is a multi-leaf damper with counter-rotating plates. It is designed to regulate the air flow in the room, as well as to automatically close the rectangular damper.
Rotary plates of air flow regulators are made from aluminum profile which makes them strong and durable. In addition, the material gives the regulator corrosion resistance and lightness. The body is made of galvanized sheet steel. Fixing the position is carried out using a lever with a metal handle and a stopper. Installation is carried out using a flange connection.
Variable Air Volume Systems VAV (Variable Air Volume) can regulate the air supply separately in each room. Thus, you can turn off the ventilation in any room. Traditional ventilation systems supply air to all rooms, regardless of the presence of people. VAV systems are only gaining popularity in Russia, as previously this method of ventilation required sufficient financial costs. Now the situation has changed and such an air flow regulator can be purchased inexpensively.
In the online store "Inplast" you can buy air regulators at affordable prices. In stock VAV systems and Smay ventilation equipment. We carry out delivery across Russia.
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