What is Double Pipe Heat Exchanger & it's Working Principles types

 

Heat Exchangers transfer or exchange heat between two fluids without mixing and come in various types depending on the design, application, required space, and fluid flows in the system. The heat exchangers have a barrier that separates the fluids and allows heat transfer simultaneously.  

The double pipe heat exchanger is one of the most basic types of exchangers with a very flexible configuration. There are two types of counterflow or parallel flow for this type of pipe, which are the basis for determining pipe size, length, and the number of bends. In this article, we’ll explore different aspects of double pipe heat exchangers. 


Heat exchangers with double pipes 

In a double pipe heat exchanger, we have a large pipe with a small pipe inside it concentrically, and all the heat transfer occurs in the larger pipe. As a conductive barrier, a small pipe flows one fluid through its interior and another fluid flows between the inner and outer pipes. Outside or shell side fluid flow includes inner side fluid flow. 


This type of heat exchanger is also known as a hairpin, jacketed pipe, jacketed u-tube, and pipe in pipe exchanger. One pipe or pipe bundle can be contained (less than 30), and the outer pipe must have a diameter of less than 200mm. In some instances, longitudinal fins in the inner tube are used to increase heat transfer between working fluids. 


Specification and Applications 

A double pipe heat exchanger is one of the simplest heat exchangers. There are many options available to a customer because of the straightforward design. There are a wide variety of custom heat exchangers available in the market to satisfy industry and project needs. This type would be best suited for low-capacity applications, where the heat transfer area is less than 45 square metres. 

It is important to know what type of fluid you are using when using this exchanger. Viscous fluids should be used on the shell side due to the larger space available in the flow. Therefore, if you are using steam as a fluid in the exchanger, it would be better to use pipes. 


A proper exchanger should be selected based on the project specifications. It should meet the required temperature and transfer requirements. When you provide these details, you make it easier for a supplier to introduce exchangers on the market or design the right pipe pairs for you. It was discussed before that the design of a double pipe heat exchanger is simple and modular, but if you increase the exchanger’s surface area, you’ll have to pay a lot more for it. 


Because of their simple, elegant, and practical design, double pipe heat exchangers are suitable for a wide range of applications. Listed below are just a few: 

  • Boilers and compressors, as they operate at high temperatures and pressures 
  • Heating and cooling in process engineering 
  • Refining petroleum 
  • Treatment of sewage 

Try double pipe heat exchangers for your project if space is an issue and you do not need a complex heat exchanger. 

 

To Know More Read Full Article Here: https://sa179tubes.com/what-is-double-pipe-heat-exchanger-its-working-principles-types/ 

 

#SA179 #StainlessSteel #design #steel #rust #sculpture #metal #Heater #plate 

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