How does a plate heat exchanger transfer heat transfer and how does a plate heat exchanger achieve h

Plate heat exchangers.

It is made of pressing plates with concave and convex, the hot medium is in one layer, the cold medium is in one layer, the hot medium is from the top to the bottom, the cold medium is from the bottom to the bottom, from the top to achieve heat exchange, which is countercurrent, the heat transfer effect is better than the downstream, and the downflow is in one direction.

Plate heat exchanger is the heat exchange between cold and hot medium, with plate heat exchanger can be used for heating, cooling, condensation, but there needs to be a refrigerant or heat medium to exchange, it can not produce heat, it is heat exchange, this point should be clear.

Through two different media respectively through the two sides of the heat exchange panel, heating or cooling, the common is the alloy plate laminated with interphase sealing rubber strips, so that the two heat exchange media have been on both sides of the heat exchange plate and flow, the heat exchange effect is better than the shell and tube type.

The rectangular corrugated sheets with four corners of the openings are superimposed, and the hot and cold media flow through the plate surface at intervals to achieve heat exchange.

Hot and cold exchange, hot water and cold water are transferred between the plates, and cold water and heat exchange are not fused.

The plate heat exchanger is made of many corrugated metal sheets pressed and formed at certain intervals, sealed by gaskets around the perimeter, and pressed by the frame and clamping bolt pairs, the four corner holes of the plates and gaskets form the distribution pipe and the collection pipe of the fluid, and at the same time, the cold and hot fluids are reasonably distributed freely, and the heat transfer is carried out through the plates to achieve the purpose of heat exchange. For more heat exchange knowledge, you can log in to Suzhou Ambote's official ** to understand.

The design principle of plate heat exchanger is composed of two parts: an external frame and a heat exchange plate, of which the core component is the heat exchange plate, which is usually pressed by a metal sheet, and the plate body has a regular corrugated shape. Through stacking, rubber gasket compression, bolt fixing and other processes, a plurality of heat exchange plates are alternately arranged at certain intervals, and then rubber is used for peripheral sealing, which constitutes a complete set of plate heat exchanger. Working principleWhen working, a thin rectangular fluid channel will be formed between each heat exchange plate, and the cold and hot heat exchange medium will enter these narrow and tortuous flow channels through the holes in the four corners of the plate, and the corrugation on the plate will enhance the stiffness of the plate and the turbulence of the fluid.

The two mediums form parallel flow or counterflow between the plate barriers, and heat exchange is carried out through the middle spacer layer plate to achieve the purpose of use.

Before this question, it is necessary to know what a plate heat exchanger is. Plate heat exchanger is a kind of heat exchanger composed of pressed metal heat transfer plates, so how to achieve heat exchange? In fact, a rectangular channel of cold and hot medium will be formed between the metal plates of the plate heat exchanger, and then the heat transfer and exchange will be realized through the metal plates.

For a specific example, the AN series detachable gasket pressure isolation station heat exchanger under the brand of Exxon is a kind of plate heat exchanger, which has a large length and width of the plate, and the circulation dead zone of the rectangular channel between the plates is small, so it can achieve a better heat exchange effect of the rock vertical, and is suitable for the working conditions of small heat exchange temperature difference, long plate length and large unilateral temperature difference, especially in the field of central heating, which requires long-distance transportation of heat energy.

There are also AF series non-contact ultra-wide runner plate heat exchanger, which also realizes heat exchange through the plate source failure, but due to its reasonable version design, the pressure of the plate does not completely depend on the contact of the plate, and the ultra-coarse crack and wide flow channel ensures the flow capacity, and has a higher heat exchange efficiency compared with the traditional heat exchanger on the market, and the plate has no dead zone, so it will also be used in many fields, such as textile printing and dyeing, waste heat, urban water utilization, power energy, nuclear power, petrochemical and natural gas industries.

Plate heat exchanger is a 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. Plate heat exchanger is an ideal equipment for liquid-liquid and liquid-steam heat exchange.

It has the characteristics of high heat exchange efficiency, small heat loss, compact and lightweight structure, small footprint, 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]

There are two main types of plate heat exchangers: frame type (detachable) and brazing type, and there are three main types of plate forms: herringbone corrugated plate, horizontal straight corrugated plate and tumor-shaped plate. [2]