What are heat exchangers and types of heat exchangers?

The heat exchanger is a widely used tool for the heat treatment of materials. It is used for cooking, pasteurization, sterilization, and heating or cooling a wide range of products.

When it comes to designing a heat exchanger, there are two main considerations to keep in mind. The first is to select the appropriate type of Heat Exchanger Tubes Manufacturers In India: plate, tubular, corrugated tube, scraped surface, etc. Several factors will influence this choice. These factors are the nature of the product to be heated or cooled; the purpose of the process. The important factor to consider is restrictions on the environment in which the exchanger will be used. The second consideration is the size. The heat exchanger must be properly sized for its purpose.

Types of heat exchangers are

Plate heat exchanger:

They are composed of thin Duplex Steel Pipe and compressed within a frame, with the product and the service circulating in alternate channels. They are ideal for applications where fluids have a relatively low viscosity and no particles. They are also a valid option when the product outlet temperature is close to the service inlet temperature.

Performance can be improved by setting the plate design, such as the angle of corrugation of the exchanger plates. These are assembled in a reverse formation to create two parallel channel systems, one for each liquid. The direction of the corrugation is opposite in both fluids. A high number of support points are achieved, creating a lattice in each channel. It provides a high level of turbulence, which in turn leads to high heat transfer rates.

Tubular and corrugated heat exchangers: According to Gi Pipe Manufacturers In India, tubular heat exchangers consist of one or more tubes within a jacket. The product flows into the tube, and the service fluid flows over the tubes (through the jacket). Through corrugated tube technology, heat transfer and efficiency are increased compared to standard smooth tube heat exchangers. Furthermore, potential fouling is minimized, making it possible to supply more compact and economic exchanges. Specific API 5L Seamless Pipe models have been developed for various types of industries. They are manufactured in stainless steel suitable for use in the food, pharmaceutical, and chemical industries.

Scraped Surface Heat Exchangers:

Used in the purpose where fouling reason heat transfer rate to reduce, or when viscous fluids have very low heat transmit rates.

Fouling occurs when fluids degrade near the tube wall, and layers of solids settle on the tube wall. These layers act as an insulator and prevent efficient heat transfer. Another form of fouling is crystallization. Here, due to cooling or a rising concentration, the liquid components are dumped on the exchanger ASTM A672 PIPE surface. Scraping the heat exchanger's surface to remove these layers of scale and dirt allows the heat transfer rate to remain high.

In general, the more viscous the fluid, the lower the heat transfer rate, which is why highly viscous fluids require very large transfer areas. Scraped surface heat exchangers mix fluid vigorously, increasing the amount of fluid in contact with the heat exchange surface. It increases the rate of heat transfer and reducing the required surface area.