The plate heat exchanger spare parts price emerged in the 1920s and was applied in the food industry. The plate heat exchanger spare parts price made by replacing tubes with plates has a compact structure and good heat transfer effect. Therefore, it has successively developed into various forms. In the early 1930s, Sweden first produced the plate heat exchanger spare parts price. Then, in the UK, a plate heat exchanger spare parts price made of copper and its alloy materials was manufactured by brazing for the heat dissipation of aircraft engines. In the late 1930s, Sweden produced the first plate heat exchanger spare parts price for pulp mills. During this period, in order to solve the heat exchange problem of highly corrosive media, people began to pay attention to the plate heat exchanger spare parts price made of new materials.

Around the 1960s, due to the rapid development of space technology and cutting-edge science, there was an urgent need for various high-performance and compact plate heat exchanger spare parts prices. Coupled with the development of technologies such as stamping, brazing and sealing, The manufacturing process of the plate heat exchanger spare parts price has been further improved, thereby promoting the vigorous development and wide application of the compact plate-type plate heat exchanger spare parts price. Furthermore, since the 1960s, in order to meet the needs of heat exchange and energy conservation under high-temperature and high-pressure conditions, the typical shell and tube plate heat exchanger spare parts price has also been further developed. In the mid-1970s, in order to enhance heat transfer, the heat pipe plate heat exchanger spare parts price was created on the basis of the research and development of heat pipes.

In the plate heat exchanger spare parts price, the relative flow directions of the fluid generally include co-current and counter-current. When flowing downstream, the temperature difference between the two fluids at the inlet is the greatest and gradually decreases along the heat transfer surface until it is the smallest at the outlet. When countercurrent occurs, the temperature difference distribution of the two fluids along the heat transfer surface is relatively uniform. Under the condition that the inlet and outlet temperatures of the cold and hot fluids are constant, when there is no phase change in both fluids, the average temperature difference in counter-flow is the largest and that in co-flow is the smallest.

Under the condition of completing the same heat transfer quantity, the adoption of counter-flow can increase the average temperature difference and reduce the heat transfer area of the plate heat exchanger spare parts price. If the heat transfer area remains unchanged, the consumption of the heating or cooling fluid can be reduced when countercurrent is adopted. The former can save equipment costs, while the latter can save operation costs. Therefore, counter-flow heat exchange should be adopted as much as possible in design or production and use.

When either a cold or hot fluid or one of them undergoes a phase change (boiling or condensation), since only the latent heat of vaporization is released or absorbed during the phase change, the temperature of the fluid itself remains unchanged. Therefore, the inlet and outlet temperatures of the fluid are equal. At this time, the temperature difference between the two fluids is independent of the choice of fluid flow direction. In addition to the two flow directions of co-current and counter-current, there are also cross-flow and zigzagging flow directions.

In the heat transfer process, reducing the thermal resistance in the spare parts price of the interwall plate heat exchanger to improve the heat transfer coefficient is an important issue. The thermal resistance mainly comes from the thin layer of fluid adhering to the heat transfer surface on both sides of the interwall (referred to as the boundary layer), and the fouling layer formed on both sides of the wall during the use of the plate heat exchanger spare parts price. The thermal resistance of the metal wall is relatively small.

Increasing the flow velocity and disturbance of the fluid can thin the boundary layer, reduce the thermal resistance and improve the heat transfer coefficient. However, increasing the fluid flow rate will lead to an increase in energy consumption. Therefore, when designing, a reasonable coordination should be made between reducing thermal resistance and lowering energy consumption. To reduce the thermal resistance of dirt, measures can be taken to delay the formation of dirt and the heat transfer surface can be cleaned regularly.

Generally, the plate heat exchanger spare parts price is made of metal materials. Among them, carbon steel and low alloy steel are mostly used to manufacture medium and low pressure plate heat exchanger spare parts price. In addition to being mainly used in different corrosion-resistant conditions, austenitic stainless steel can also be used as a material resistant to high and low temperatures. Copper, aluminium and their alloys are mostly used to manufacture low-temperature plate heat exchanger spare parts. Nickel alloys are used under high-temperature conditions; In addition to making gasket parts, some non-metallic materials have begun to be used to make the corrosion-resistant plate heat exchanger spare parts price of non-metallic materials. Such as graphite plate heat exchanger spare parts price, fluoroplastic plate heat exchanger spare parts price and glass plate heat exchanger spare parts price, etc.

Structure of folding unit

The heat exchange unit serves as a direct bridge between the primary heat network and users. It acquires heat from the primary heat network and automatically and continuously converts it into the domestic and heating water needed by users. It is suitable for air conditioning (heating and cooling), heating, domestic water (bathing), or other heat exchange circuits (such as floor heating, process water cooling, etc.). The heat exchange unit is composed of plate heat exchanger spare parts price, circulating water pump, make-up water pump, filter, valve, unit base, heat meter, distribution box, electronic instrument and automatic control system, etc. The steam or high-temperature water from the heat source enters the plate heat exchanger spare parts price from the primary side water supply port of the unit. The low-temperature return water from the secondary side is decontaminated through the filter and also enters the plate heat exchanger through the circulating pump. The two types of water at different temperatures undergo heat exchange, and the secondary side transfers the heat to the heat users.

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