Veza heat exchanger series VNV243 are represented by water air heaters, where hot water used as a coolant. The relevance of the use of such copper-aluminum plate heat exchangers is observed in air conditioning, ventilation and heating systems. In areas with cold and temperate climates, operation will be most appropriate. What are design features such equipment, and what models do we sell?
Design Features
The design of heat exchangers VNV243 is presented copper tubes(one or more rows), the outer diameter of which is 12 mm. Corrugated aluminum plates with a thickness of 0.12-0.25 mm are used as heat exchange elements for their fins.
The coolant leaves and enters through copper and steel pipes collectors into which the ends of grouped tubes are soldered. The collectors, in turn, are equipped with special pipes with a flanged, threaded or welded connection, which ensures connection with external system. The size of the frontal section of the heat exchanger can be 200x100-3000x2000 mm at the choice of the consumer.
Principle of operation
Interaction with aluminum plates and copper tubes ensures that the air is heated as it passes through the heat exchanger. Elements made of an alloy of copper and aluminum provide lower energy consumption and efficient heat transfer when compared with steel heaters. On the other hand, higher requirements are imposed on the installation and operation of such models.
Due to the design features, water connection can be carried out both in a counter-flow and in a direct-flow scheme. In the first case, the energy carrier and air move in different directions, and in the second - in the same direction.
Classification
Veza VNV243 heat exchangers can be classified as follows depending on their purpose and design differences.
- Water heat exchangers acting as analogues of heaters KVS, KVB and KSk. This group includes single-row, double-row, three- and four-row models.
- Duct air heaters.
- Units for central air conditioners KTsKP can be used both as part of an air conditioning system and as a separate air heater in a process plant or ventilation system.
- Special heat exchangers designed to solve other technical problems, except for installation in air conditioning systems.
Any model that interests you can be purchased from our company. We not only produce and sell the equipment in question, but also provide detailed advice on the choice of a particular unit depending on operating conditions.
At the moment, no project participant in your region offers the product on the portal: Heat exchanger Veza VNV 243-065-050-02-1.8-04-2. But companies verified by the website portal are ready to supply (and, if necessary, install) Veza VNV 243-065-050-02-1.8-04-2 Heat Exchanger or analogues. Please fill out the application and you will receive a message with an offer for this product.
Description of the series
Plate copper-aluminum heat exchangers produced by Veza are designed for heating and cooling air in systems air heating, ventilation and air conditioning various designs.
According to the coolant used, heat exchangers are divided into the following groups: VNV 243 (water heater) - hot water is used as a coolant; VOV 243 (air cooler) - used as an energy carrier cold water, solutions of ethylene glycol and propylene glycol.
Depending on their purpose, manufactured heat exchangers can be divided into several groups that have certain design features:
1. Water heat exchangers - analogues of air heaters of the KSk, KVB and KVS types. This type of heat exchangers is intended to replace KSk, KVB and KVS heat exchangers during reconstruction and repair of existing systems or for use in newly designed ventilation systems.
Subgroups VNV.243: single-row - used as closers in ventilation systems or as air heaters not lower than -10°C;
double-row - used as air heaters in ventilation systems;
three-row - used as air heaters when using return water (water mode 60/40 °C) or as air heaters in technological processes(for example, in a wood drying chamber);
four-row - used as air coolers in ventilation systems.
2. Duct air heaters (KVN). The standard dimensions of the front sections of the KVN correspond to the sections of existing air ducts. The connecting dimensions correspond to the connecting dimensions of the duct ventilation elements ( duct fans, duct electric heaters, duct silencers, etc.), which allows them to be used for installation in existing systems ventilation or to replace imported duct air heaters. KVN subgroups: two-row for rectangular air ducts- used for heating air in ventilation systems; three-row for rectangular air ducts - used as air heaters in ventilation systems, as well as heat exchangers for air curtains; heat exchangers for round air ducts.
3. Heat exchangers for central air conditioners of the KTsKP type. Designed for installation or replacement of failed heat exchangers in air conditioners produced by Veza, as well as other manufacturers. In addition, these heat exchangers can be used as separate air heaters (air coolers) in ventilation systems or in process plants.
4. Special heat exchangers. Heat exchangers produced by Veza can be used not only for installation in air conditioning systems, but also for solving other technical problems.
Veza develops and produces both individual heat exchangers and products based on them.
At the moment, no project participant in your region offers the product on the portal: Heat exchanger Veza VNV 243-053-050-02-1.8-04-2. But companies verified by the website portal are ready to supply (and, if necessary, install) Veza VNV 243-053-050-02-1.8-04-2 Heat Exchanger or analogues. Please fill out the application and you will receive a message with an offer for this product.
Description of the series
Plate copper-aluminum heat exchangers produced by Veza are designed for heating and cooling air in air heating, ventilation and air conditioning systems of various designs.
According to the coolant used, heat exchangers are divided into the following groups: VNV 243 (water heater) - hot water is used as the coolant; ВОВ 243 (air cooler) - cold water, solutions of ethylene glycol and propylene glycol are used as an energy carrier.
Depending on their purpose, manufactured heat exchangers can be divided into several groups that have certain design features:
1. Water heat exchangers - analogues of air heaters of the KSk, KVB and KVS types. This type of heat exchangers is intended to replace KSk, KVB and KVS heat exchangers during reconstruction and repair of existing systems or for use in newly designed ventilation systems.
Subgroups VNV.243: single-row - used as closers in ventilation systems or as air heaters not lower than -10°C;
double-row - used as air heaters in ventilation systems;
three-row - used as air heaters when using return water (water mode 60/40 °C) or as air heaters in technological processes (for example, in a wood drying chamber);
four-row - used as air coolers in ventilation systems.
2. Duct air heaters (KVN). The standard dimensions of the front sections of the KVN correspond to the sections of existing air ducts. The connecting dimensions correspond to the connecting dimensions of duct ventilation elements (duct fans, duct electric heaters, duct silencers, etc.), which allows them to be used for integration into existing ventilation systems or for replacing imported duct air heaters. KVN subgroups: double-row for rectangular air ducts - used for heating air in ventilation systems; three-row for rectangular air ducts - used as air heaters in ventilation systems, as well as heat exchangers for air curtains; heat exchangers for round air ducts.
3. Heat exchangers for central air conditioners of the KTsKP type. Designed for installation or replacement of failed heat exchangers in air conditioners produced by Veza, as well as other manufacturers. In addition, these heat exchangers can be used as separate air heaters (air coolers) in ventilation systems or in process plants.
4. Special heat exchangers. Heat exchangers produced by Veza can be used not only for installation in air conditioning systems, but also for solving other technical problems.
Veza develops and produces both individual heat exchangers and products based on them.
Plate copper-aluminum heat exchangers manufactured according to technical specifications TU 4663-028-40149153-99, designed for heating and cooling air in air heating, ventilation and air conditioning systems of various designs. Heat exchangers are designed for operation in areas with temperate and cold climates (UHL3 according to GOST 15150).
Design and operating principle of VNV 243, VOV 243
According to the coolant used, heat exchangers are divided into the following groups:
— VNV 243 (water heater) - hot water is used as a coolant;
ВОВ 243 (air cooler) - cold water, solutions of ethylene glycol and propylene glycol are used as an energy carrier.
The design and manufacturing technology of these heat exchangers are basically identical. Constructive and technological features Each type will be discussed below. The heat exchanger consists of one or more rows copper pipes approx with an outer diameter of 12 mm, finned with heat exchange elements in the form of corrugated plates made of aluminum foil with a thickness of 0.12...0.25 mm. The tubes are combined into groups, the ends of which are soldered into manifolds made of steel or copper pipes, through which the coolant or refrigerant enters and exits. For connection to an external system, the collectors have special pipes that provide
welded, threaded or flanged connection. By agreement with the consumer, heat exchangers are manufactured with frontal cross-sectional dimensions from 200×100 (mm) to 3000×2000 (mm). Heating or cooling of air occurs when it passes through a heat exchanger in the process of interaction with copper tubes and aluminum plates. Compared to steel heaters, the use of copper-aluminum elements increases the efficiency of heat transfer and reduces energy consumption, but imposes Additional requirements to the installation and operation of these devices.
Design of water heat exchangers allows you to provide both direct-flow (the direction of movement of air and energy carriers coincide) and counter-flow (the direction of movement of air and energy carriers are opposite) water connection schemes.
When choosing a circuit, it is necessary to take into account that operating the air heater in a counterflow mode allows you to obtain an increase of 10% in thermal power, and the use of a direct-flow circuit significantly reduces the risk of freezing the heat exchanger. When the calculated air temperature at the inlet to the air heater is above minus 15 °C, it is advisable to use a counterflow circuit, as it ensures more efficient heat removal, and at more low temperatures- direct flow, as safer.
For the air cooler, only a counterflow circuit is used, since there is no threat of freezing.
