Brazed Plate Heat Exchanger

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Brazed plate heat exchanger (BPHE) is a kind of partition heat exchanger. It is a type of high-efficiency heat exchanger made by stacking a series of metal sheets with a certain corrugated shape and brazing in a vacuum furnace. Thin rectangular channels are formed between various plates, and heat exchange is carried out through the plates.

Brazed Plate Heat Exchangers can be used for a range of functions in a heating or cooling system – they can act as condensers, evaporators, oil or gas coolers and be used for other functions that involve the transfer of heating or cooling.

Brazed Plate Heat Exchangers are widely used in many different industries and often in large-scale residential heat networks. They play an important role in delivering air conditioning process and production, refrigeration, data center cooling and residential heating.

- Working Principle

The BPHE is in principle constructed as a package of corrugated channel plates between the front and rear cover-plate packages. The cover-plate packages consist of sealing plates, blind rings and cover plates. Connections are mounted on the cover plates and can be customized to meet specific market and application requirements. During the vacuum-brazing process, a brazed joint is formed at every contact point between the base and the filler material. This design creates a heat exchanger that consists of two separate channels or circuits.
Sealing plates are used to seal off the space between the cover plate and the first and last channel plates. The number of cover plates varies, for example with the type and size of BPHE and its pressure rating. Some BPHEs have a blind ring to seal off the space between the channel plate and the cover plate. In others, the blind rings are integrated into the cover plate and first/last channel plates.

Brazed plate heat exchanger is composed of front and rear plates, plates, joints and copper foil. The copper foil is melted in a vacuum furnace, and the molten copper liquid flows between the narrow gaps of the heat exchanger by using the siphon principle, and the brazing is formed after cooling.

 

 

 

The production process of brazed plate heat exchanger mainly includes:

 

A. Raw Material Reserve

B. Plate Pressing

C. End Plate Pressing

D. Stacking Compaction

E. Vacuum Furnace Brazing

F. Leak Test

G. Pressure Test and Other Processes.

- Advantages

Compact – Our blazed plate heat exchangers are extremely compact compared with other technologies. The carbon footprint can be as little as one tenth that of a shell and tube heat exchanger or half that of a gasket plate heat exchanger.
Efficient – With no need for gaskets or supporting equipment, about 95% of the material is used to transfer heat. The highly turbulent flow also enables you to use small temperature differences efficiently.
Reliable – The robust construction requires no gaskets, eliminating their risk of leaking. This means stable thermal and hydraulic performance, with minimal maintenance and operational downtime.
Flexible – The compact size uses space efficiently and makes system design more flexible. Larger installations can be constructed unit by unit via standard doors and elevators, and it is easy to expand capacity when demand increases.
Cost-effective – You will save on energy, maintenance, spare parts, and installation. The life-cycle cost over 15-20 years can often be half that of a corresponding gasketed solution.
Self-cleaning – Our brazed plate heat exchangers are normally self-cleaning, thanks to highly turbulent flows. In applications with a high risk of fouling or scaling, Cleaning in Place is easy without disassembly. Read more about plate heat exchanger cleaning.
Customized – By combining plate design, materials, and connections from standard components, we keep lead times short while still maximizing output in your specific application

- BPHE Plates and Channel Types

Certain BPHEs are available with different types of channel plates where the herringbone pattern varies. The benefit of different herringbone patterns is that the hydraulic and thermal characteristics of the BPHE can be modified. For example, two BPHEs can have the same pressure drop on both sides despite different flow rates.

The fluids can pass through the heat exchanger in different ways. For parallel flow BPHEs, there are two different flow configurations: co-current or counter-current (click images on the right).

Co-current flow
Counter-current flow

There are several different versions of the channel plate packages. Examples include:

Dual-circuit BPHE
Two-pass BPHE, which corresponds to two units connected in series.
Dual-over-two-pass BPHE

- Basic Parameters

Plate Materials: 316,0.4mm

 

Foiling Materials: Copper/Stainless Steel/Nickle

 

Design Pressure: Max 45bar

 

Design Temperature: -196~225℃

- Recommended Applications

Oil Cooler

 

HVAC

 

Domestic Heating

 

Evaporators and Condensers

Application for Brazed

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