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Structure and Application of Plate Heat Exchanger (Heat Exchanger)

2021-09-05Common Problem371

The plate heat exchanger is composed of a group of corrugated metal plates with four corner holes for the passage of two liquids for heat transfer. The sheet metal is mounted in a frame with fixed plates and movable compression plates on the sides, and is clamped with clamping bolts. The plates are equipped with sealing gaskets to seal the fluid channels and guide the fluid to flow alternately into their respective channels to form heat exchange. The flow rate, physical properties, pressure drop and temperature difference of the fluid determine the number and size of the plates. The corrugated plate not only increases the degree of turbulence, but also creates many bearing points, sufficient to withstand the pressure difference between the media.

Common plate materials for plate heat exchangers

The most commonly used materials are as follows (all compressible materials can be used to make sheets):
·Stainless steel (AISI 304, AISI 316, SMO (18/12/6.5) ·Titanium ·Titanium-palladium alloy ·Alloy Incoloy825 ·Hastelloy
·Graphite plate DiabonF100
Common gasket materials
Many elastic materials can be used as gaskets
·Nitrile rubber (NBR) ·Fluorine rubber (FPMorVITON) ·Ethylene propylene diene monomer (EPDM) ·Neoprene rubber (NEOPRENE) ·Polytetrachloroethylene (CSM)
Other materials are subject to user needs.

Plate Heat Exchangers (PHE) in Heating Systems

Plate heat exchangers (PHE) are commonly used in various types of heating applications requiring comfort, reliability and safety. In addition to being able to transfer heat from one circulation loop to another, this heat exchange The filter can also effectively handle the pressure difference that usually exists between the primary side and the secondary side. Alfa Laval’s gasketed plate heat exchangers have various models and specifications, which can meet the requirements of all comfort heating conditions, such as domestic water heating, swimming pool heating, etc., from small to large. Plate heat exchangers (PHE) can be tailored to the specific needs of the user, thanks to the flexibility of plate heat exchanger design.

Domestic hot water heating

Compared with traditional tank-type domestic hot water heating systems, plate heat exchangers have many advantages. When the tap water passes through the plate heat exchanger (PHE), it can be heated to the required temperature in an instant. This means that users can immediately get hot water supply at any time. Another benefit of using plate heat exchangers to heat domestic hot water is that a plate heat exchanger system takes up much less space than traditional tank-type domestic hot water heating systems. If the user is using solar energy to produce domestic hot water, the plate heat exchanger (PHE) can separate the treated water in the solar panel from the tap water loop, and the fouling and corrosion problems in the solar panel can be alleviated. .

swimming pool water heating

In summer, when the building’s heating system is not running at full capacity, the excess heat can be used to heat the outdoor swimming pool water. A heat exchange unit installed between the circulation system of the swimming pool and the conventional heating system of the building can separate the two circulation circuits and heat the swimming pool water. However, it is important to remember that the user should wait until the water has passed through the heat exchanger before chlorination, in order to avoid high concentrations of chlorine components flowing through the heat exchanger. When the chlorine concentration is present, it is recommended that users use titanium plate heat exchange plates.

Plate Heat Exchangers (PHE) in Cooling Systems

In various refrigeration applications, especially cold storage and free cooling, the requirements for thermal efficiency are very high. Due to Guangzhou Qingli’s excellent ability in heat exchange plate manufacturing, we can control the temperature difference between the two circulation loops below 0.50C (0.90F). In addition, for such working conditions, the plate heat exchanger can be realized through a single process. This connection where all four connectors are on the front mounting plate
Way. It makes the installation and maintenance of the equipment very convenient.

Central refrigeration

The main component of the central refrigeration system is the cold source, usually a refrigerator. When cold water or a glycol solution is produced on the evaporator side, heat is also generated and removed on the condenser side of the refrigerator. A plate heat exchanger, whether used on the condenser side or the evaporator side, has many advantages.

For example, the user can cool the condenser by utilizing some kind of open cold source, such as sea or river water. However, aggressive media are often present in open circuits that can affect sensitive air conditioning equipment such as refrigerators. A plate heat exchanger, which could be installed between the two systems as a separate unit, would eliminate such problems. On the evaporator side, a plate heat exchanger can be used to separate two clean circulation loops to protect other equipment from high pressure.

District cooling

District cooling aims to make better use of existing cooling capacity and environmentally friendly cold sources, so it has environmental significance. While providing user convenience and comfort, district cooling also improves equipment idle conditions, reduces equipment maintenance requirements, and saves space occupied by equipment. On the other hand, district cooling can reduce investment and has the characteristics of flexible operation, thus bringing economic benefits to users. There are many advantages to using plate heat exchangers in indirect district cooling systems. For example, pressure separation between different circulation loops, etc. Plate heat exchangers (PHE) are available in a variety of models and specifications, each with different characteristics. Therefore, we are sure that for various practical refrigeration conditions, users will be able to find the best solution from various types of plate heat exchangers. Guangzhou Qingli Thermal Energy Machinery Equipment Co., Ltd. specializes in the production of plate heat exchangers of various specifications

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