EXERGY heat exchanger from the United States

A heat exchanger is a device that transfers heat between materials between two or more fluids at different temperatures. It is widely used in industrial fields such as chemical, petroleum, power, and food, and plays an important role. Heat exchangers can be classified into various types according to different classification methods, including the following:

1. Classified by heat transfer principle:

Inter wall heat exchanger: This type of heat exchanger separates fluids of different temperatures through the wall surface, and uses heat conduction and convection for heat transfer. The specific forms include shell and tube type, sleeve type, etc., which are the most widely used.

Regenerative heat exchanger: also known as regenerative heat exchanger, transfers heat through a solid material composed of a heat storage body, suitable for intermittent operation processes.

Hybrid heat exchanger: Direct contact between cold and hot fluids for heat transfer, such as in cold water towers and gas condensers.

Duplex heat exchanger: Combining the characteristics of partition and hybrid, it has higher heat transfer efficiency.

2. Classified by structure:

Floating head heat exchanger: One end of the tube plate is not fixed to the shell and can be removed for cleaning, suitable for media that are prone to scaling.

Fixed tube plate heat exchanger: The structure is simple, but the shell side cannot be mechanically cleaned, making it suitable for situations where the temperature difference between the two streams is not significant.

U-shaped tube heat exchanger: With only one tube plate, the tube bundle can freely expand and contract, suitable for large temperature difference applications.

Plate heat exchanger: It transfers heat through the plate surface and has the characteristics of high efficiency and compactness.

3. Classified by material:

Metal material heat exchanger: Common metal materials include carbon steel, stainless steel, copper, and copper alloys, which have high heat transfer efficiency.

Non metallic material heat exchanger: Commonly used non-metallic materials include graphite, glass, plastic, etc., mainly used for corrosive materials with low heat transfer efficiency.

As a key heat exchange equipment in industry, the classification and performance characteristics of heat exchangers determine their wide range of applications. When selecting a heat exchanger, the most suitable type should be determined based on specific process requirements and fluid characteristics. At the same time, with the advancement of technology, new types of heat exchangers such as eddy current film heat exchangers and thermosensitive sensing heat exchange units are constantly emerging, providing new technological choices for improving industrial energy efficiency.