The shell and tube heat exchanger consists of a cylindrical shell, a heat transfer tube bundle, a tube sheet, baffle plates, and a tube box. The tube bundle is securely fixed to the tube plate at both ends.
Heat exchange occurs between two types of fluids: the tube-side fluid, which flows inside the tubes, and the shell-side fluid, which flows outside the tubes.
To enhance the heat transfer coefficient of the fluid outside the tubes, baffles are typically installed in the shell. These baffles increase the velocity of the shell-side fluid, causing it to pass through the tube bundle multiple times in a lateral direction at predetermined intervals. This promotes greater fluid turbulence and improves the overall heat transfer efficiency.
Pressurized water reactors in nuclear power plants utilize steam generators, which are large two-phase shell-and-tube heat exchangers. These steam generators commonly employ U-tubes and serve the purpose of converting recycled water from a surface condenser into steam. The generated steam is then utilized to drive a turbine, producing electricity.
When it comes to the tube side of shell-and-tube heat exchangers, they often follow either a 1-pass, 2-pass, or 4-pass design. This design refers to how many times the fluid inside the tubes passes through the fluid inside the shell. In a single pass heat exchanger, the fluid enters one end of each tube and exits from the other end.
Surface condensers used in power plants are frequently designed as 1-pass straight-tube heat exchangers. These condensers, shown in the diagram, commonly employ two and four pass configurations, as they allow for the fluid to enter and exit from the same side. This simplifies the construction process significantly.
Product picture
The shell and tube heat exchanger consists of a cylindrical shell, a heat transfer tube bundle, a tube sheet, baffle plates, and a tube box. The tube bundle is securely fixed to the tube plate at both ends.
Heat exchange occurs between two types of fluids: the tube-side fluid, which flows inside the tubes, and the shell-side fluid, which flows outside the tubes.
To enhance the heat transfer coefficient of the fluid outside the tubes, baffles are typically installed in the shell. These baffles increase the velocity of the shell-side fluid, causing it to pass through the tube bundle multiple times in a lateral direction at predetermined intervals. This promotes greater fluid turbulence and improves the overall heat transfer efficiency.
Pressurized water reactors in nuclear power plants utilize steam generators, which are large two-phase shell-and-tube heat exchangers. These steam generators commonly employ U-tubes and serve the purpose of converting recycled water from a surface condenser into steam. The generated steam is then utilized to drive a turbine, producing electricity.
When it comes to the tube side of shell-and-tube heat exchangers, they often follow either a 1-pass, 2-pass, or 4-pass design. This design refers to how many times the fluid inside the tubes passes through the fluid inside the shell. In a single pass heat exchanger, the fluid enters one end of each tube and exits from the other end.
Surface condensers used in power plants are frequently designed as 1-pass straight-tube heat exchangers. These condensers, shown in the diagram, commonly employ two and four pass configurations, as they allow for the fluid to enter and exit from the same side. This simplifies the construction process significantly.
Product picture
Plate heat exchangers have been widely used in central heating, food, machinery, metallurgy, the petrochemical industry, and ships, and have become the leading heat exchange equipment in urban central heating projects. In order to ensure the normal operation of the plate heat exchanger and prolong the service life of key components, it is especially important to understand the failures of the plate heat exchanger, their causes, and treatment methods. The following is a description of how to deal with the heat exchanger when the pressure drop is too large.
Plate heat exchangers were first put into commercial production in the 1930s and are now being used more and more widely in water supply, heating, and air conditioning projects in industrial and civil buildings. The correct selection of plate heat exchangers can ensure the smooth implementation and use of the project. Here we introduce how to select the heat exchanger.
With increasing use, the heat exchanger's heat transfer efficiency will inevitably be affected, thus affecting normal operation. There are many reasons for the low heat transfer efficiency of plate heat exchangers. Because we all know that the plate heat exchanger heat transfer efficiency is very high, and this is one of the reasons why people often choose it. Today we will discuss this issue.
Even a plate heat exchanger can have problems during the course of a year and require maintenance, especially its seals, to see if it has loosened.
The plate heat exchanger is a new type of high-efficiency heat exchanger made of metal sheets with certain corrugated shapes stacked on top of each other. A thin rectangular channel is formed between the various plates, and heat is exchanged through the plates. The plate heat exchanger is an ideal equipment for liquid-to-liquid and liquid-to-vapor heat exchange.
Heat exchangers are devices used to transfer heat from a hot fluid to a cold fluid to meet specified process requirements and are an industrial application of convective heat transfer and heat conduction. Heat exchangers can be classified in different ways. Its operation process can be divided into three main categories: inter-wall, hybrid, and heat storage. According to its surface compactness can be divided into two categories: compact and non-compact. Next, let's learn about the history of heat exchanger development.
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