The basic structure of the plate heat exchanger, the structure of the plate heat exchanger

<>Figure 4-18 Plate heat exchanger.

The four holes on the plate in the figure are the inlet and outlet of the hot fluid and the cold fluid, and the cold and hot fluid channels are formed in the welding line around the plate, and the fluid is exchanged through the plate wall during the flow process. The supporting shape of the plate is generally a little support-shaped, corrugated, herringbone-shaped, etc., which is conducive to destroying the laminar flow law of the fluid, causing it to produce numerous vortices and play a role in strengthening heat transfer.

Plate heat exchangers have excellent heat transfer performance and are currently widely used in household ** air conditioner groups.

However, due to the narrow passage on the water side of the plate heat exchanger, and it is easy to scale at high temperatures, resulting in blockage, the requirements for cooling water quality are high.

The structural principle of plate heat exchanger is easy to understand at a glance! After reading it, you will fix it!

Frame and plate, wherein frame is made up of fixed hold-down plate, movable hold-down plate, upper and lower guide rod and clamping bolt etc. The sheet is made of thin plates made of various materials and is pressed into corrugations of different shapes with various forms of abrasives, and there are corner holes in the four corners of the plate for the flow channel of the medium. The perimeter and corner holes of the plate are sealed with rubber gaskets.

The plate heat exchanger is made by installing the plates in the form of superposition between the fixed hold-down plate and the movable hold-down plate, and then clamping them with clamping bolts.

Oh, it's the frame, plates, bolts, and the details of the base can be seen in my space.

Brand model: Huawei MateBook D15

System: Windows 11

The plate heat exchanger is made of many stamped corrugated thin plates at certain intervals, sealed by gaskets around the perimeter, and overlapped and pressed with a frame and a compression spiral, the four corner holes of the plate and the gasket form a distribution pipe and a collection tube of the fluid, and at the same time, the cold and hot fluids are reasonably separated, so that they flow in the flow channel on both sides of each plate respectively, and the heat exchange is carried out through the plates.

Plate heat exchanger is a new type of high-efficiency heat exchanger formed by stacking a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between the various plates, through which heat is exchanged between the halves. Compared with the conventional shell-and-tube heat exchanger, its heat transfer coefficient is much higher under the same flow resistance and pump power consumption, and there is a tendency to replace the shell-and-tube heat exchanger within the applicable range.

Plate heat exchanger is a kind of heat exchanger formed by pressing thin metal plates into heat exchanger plates with a certain corrugated shape, and then stacking them and fastening them with splints and bolts. Slender rectangular channels are formed between the plates, and heat exchange is carried out through the half plates. The working fluid flows through a narrow and tortuous channel formed between the two plates.

The hot and cold fluids pass through the flow channel in turn, and there is a sandwich plate in the middle to separate the fluids, and heat exchange is carried out through this plate. The structure and heat exchange principle of plate heat exchanger determine that it has the characteristics of compact structure, small footprint, high heat transfer efficiency, large operation flexibility, wide application range, small heat loss, and convenient installation and cleaning. The plate heat exchanger is a new type of high-efficiency heat exchanger consisting of a series of corrugated metal plates.

Thin rectangular channels are formed between the various plates, through which heat exchange is carried out. Plate heat exchangers are ideal for liquid-liquid and liquid-vapor heat exchange. It has the characteristics of high heat exchange efficiency, small heat loss, compact and lightweight structure, small footprint, easy installation and cleaning, wide application and long service life.

Under the same pressure loss, its heat transfer coefficient is 3-5 times higher than that of tubular heat exchanger, and the floor area is one-third of that of tubular heat exchanger, and the heat rate can reach more than 90%.

<>1. Refrigeration: used as a condenser and evaporator. 2. HVAC:

Intermediate heat exchanger used with boilers, intermediate heat exchangers for high-rise buildings, etc. 3. Chemical industry: soda ash industry, ammonia synthesis, alcohol fermentation, resin synthesis cooling, etc.

4. Metallurgical industry: aluminate mother liquor heating or cooling, steelmaking process cooling, etc. Plate heat exchanger is a high-efficiency heat exchanger formed by stacking a series of metal sheets with a certain corrugated shape.

Perform a hot medium to cool down. A circulating device for heating with cold medium. Thin rectangular channels are formed between the various plates, through which heat is exchanged.

It has many characteristics, such as high heat exchange efficiency, low heat loss, compact and lightweight structure, small footprint, and wide application and long service life. Under the same pressure loss, its heat transfer coefficient is 3-5 times higher than that of tubular heat exchanger, and the floor area is one-third of that of tubular heat exchanger, and the heat rate can be as high as more than 90%.

<>1. Central heating has compact structure, easy operation, simple cleaning and high heat transfer coefficient, which plays a very big role in improving the management level and rationally distributing heat energy. 2. It is widely used for heat exchange of chilled water in the air-conditioning system, plays the role of a condenser, prevents equipment from corroding or blocking, and saves the running time of the chiller. 3. The pressure blocker of high-rise buildings decomposes the higher static pressure into several parts of the smaller pressure, and reduces the pressure requirements of the system for pumps, hot and cold water units and other equipment.

The working principle of a plate heat exchanger is carried out by a heat transfer mechanism.

The working principle of a plate heat exchanger is carried out by the heat transfer mechanism, according to the laws of thermodynamics, heat is always spontaneously transferred from a hot object to a low temperature object. Two fluids with different temperatures flow in the space separated by the wall, and the convection flow on the wall surface is formed by the heat conduction of the wall and the convection of the fluid on the wall surface, which promotes heat exchange between the two fluids.

Plate heat exchanger is a kind of heat exchanger made of thin metal plates pressed into heat exchange plates with a certain corrugated shape, and then stacked and fastened with splints and bolts. Thin rectangular channels are formed between the various plates, through which heat is exchanged between the halves. The working fluid flows through a narrow and tortuous channel formed between the two plates.

The hot and cold fluids pass through the flow channel in turn, and there is a compartment plate in the middle to separate the fluids and exchange heat through this plate. The structure and heat exchange principle of plate heat exchanger determine that it has the characteristics of compact structure, small footprint, high heat transfer efficiency, large operation flexibility, wide application range, small heat loss, and convenient installation and cleaning.

Classification

It can be divided into four categories: detachable plate heat exchanger, also known as plate heat exchanger with sealing gasket, welded plate heat exchanger, spiral plate heat exchanger, plate and coil heat exchanger, also known as honeycomb heat exchanger. Among them, the welded plate heat exchanger is further divided into:

Semi-welded plate heat exchanger, all-welded plate heat exchanger, plate and shell heat exchanger, brazed plate heat exchanger.