When it is necessary to change the heat exchanger?
Depending on the conditions of use and design features, the warranty period of operation of multifluid plate printed circuit heat exchangers equipment of such world-famous brands is 10, 20 or more years. As a rule, half of the specified periods without major repairs.
However, sooner or later, even the most reliable equipment no longer saves by replacing gaskets. Plates or heat exchanger seals, and the owner needs to think about buying a new, more modern and efficient unit.
This can indicate a decrease in efficiency and equipment failures that recur a short time after repair. The formation of leaks in a brazed heat exchanger, damage to more than 40% of the plates. In addition, a new device may require when upgrading the system, when the available capacity is no longer enough to meet current needs.
Replacement of multifluid plate printed circuit heat exchangers
In some cases, especially when the heat or cold supply provides by a collapsible plate heat exchanger, it is enough to eliminate local problems to restore performance.
Also, the problem may consist in improper connection of equipment, blockages, excessive pressure inside the circuit, incorrect assembly of the plate pack and other errors made during installation and operation. In addition, after a comprehensive diagnosis, our experts will indicate the cause of the failure and recommend the best option for restoring the system.
Plate heat exchangers: principle of operation and device
The plate heat exchanger equips with the following components:
- Set of embossed plates,
- Screed plates,
- Tie bolts.
The device of a multifluid plate printed circuit heat exchangers from the " Triumph Plant" provides for the compression of corrugated plates using tie plates. The desired position of the plate obtains thanks to the guide parts, and fix by means of tie bolts. It will depend on the number of plates in the device block to what extent they will compress.
The sealing of the plates with each other occurs with the help of heat-resistant rubber. The shape of the sealing connection allows the correct flow of liquids: with this design, mixing of materials is impossible. In addition, the working media enter the heat exchanger through the nozzles necessary for a complete heat transfer process.
Multifluid plate printed circuit heat exchangers: equipment operation
If we consider plate heat exchangers, then the principle of operation of these devices base on the creation of a heat exchange surface due to a set of plates with corrugated sides. They must be the same in shape and size. The design looks simply, but the efficiency of the device is quite high.
The principle of operation and operation of a plate heat exchanger is the distribution of working media between slot-shaped channels. They form due to the contact of neighboring plates, while the media themselves move in a countercurrent mode.
Heat exchanger: special pattern of the plates
High efficiency and compactness of the multifluid plate printed circuit heat exchangers achieve precisely due to the special pattern of the plates. In the near-wall layer, due to the corrugated surfaces, the flow is tribalized, which makes it possible to intensify heat transfer even at low hydraulic resistances.
In addition, due to the increased turbulence, the plates less contaminate and the surfaces do not have to clean frequently. Branch pipes for supplying working media install in the front and rear plates.
It is necessary to increase the thermal power
It is possible to add new plates, this does not affect the principle of operation of plate heat exchangers. Additional space may require to increase capacity, so it is worth considering this possibility before choosing and installing the device.
Work principles of multifluid plate printed circuit heat exchangers
The principle of operation of a plate heat exchanger is due to the fact that during the passage of media through the heat exchanger, heat transfers to the plate. The latter cools from the reverse side by a heated medium. The plates made of stainless steel 0.5 mm thick. In addition, with a special order of components, it is possible to manufacture a thicker wall of 0.6 mm.
Formation of Plates by the method of cold stamping
Sealing gaskets are made from EPDM rubber compound. In the device, the plates rotate relative to each other along the axis by 180 degrees, in this case, the corrugations on the mating surfaces direct in opposite directions.
There are several types of multifluid plate printed circuit heat exchangers:
- One-way,
- Two-way with and without circulation line,
- Two-way mono-block,
- Three-way.
Plate heat exchangers are gradually conquering Europe
All new buildings, both residential and industrial, equip with these devices. Let us consider in more detail the technical characteristics of plate heat exchangers.
This equipment is known for its energy efficiency and high efficiency. The features also include compactness and the ability to increase the number of plates in the device. All this achieves due to the unique technology of production and corrugation of the multifluid plate printed circuit heat exchangers.
In addition, thanks to the corrugated notch of the plate, the flow around is even, and the flow resistance even out.
How do technical characteristics affect plate heat exchangers?
When choosing a plate heat exchanger, you should carefully study the characteristics of the equipment:
- Working surface profile area - from 0.018 to 3.8 m²;
- Connection diameter range - from 0.2 to 50 cm;
- Permissible unit power - up to 150 mw;
- Heat carrier consumption - up to 4075 cubic meters per hour.
Among the technical characteristics, it should note separately that
- Multifluid plate printed circuit heat exchangersare compact: the equipment occupies an area 2-10 times smaller than standard designs;
- The transfer coefficient is high, and heat loss is low;
- In the work there are small pressure losses;
- Equipment can easily disassemble for cleaning;
- By adding new plates, the capacity of the equipment increases.
The technical characteristics of the plate heat exchanger
Equipment plates provide alternation of channels with heating medium. The more plates are common, the wider the possibilities of the device in the sphere of influence on the temperature regime of the external environment.
In addition, according to the specifics of functioning, multifluid plate printed circuit heat exchangers distribute according to the number of strokes carry out.
